Tutorial

Getting Started

Lossless Extract is a powerful macOS and Windows application that extracts high-quality audio tracks from MKV video files, Blu-ray discs, BDMV folders and ISO files, DVD-Audio discs, SACD ISO files, and Audio CDs. Whether you’re archiving music from concert videos, extracting soundtracks from movies, preserving audio from Blu-ray discs, digitizing your DVD-Audio and SACD collections, or ripping your CD library, this app makes it simple.

What You Can Do

  • Extract audio from MKV video files with chapter support
  • Extract audio directly from Blu-ray Discs, BDMV folders and ISO files with Atmos detection
  • Extract audio from DVD-Audio (AUDIO_TS) folders and ISO files
  • Extract audio from SACD ISO files (DSF, DFF, or FLAC output)
  • Rip Audio CDs with automatic MusicBrainz metadata and AcoustID fingerprinting
  • Backup encrypted DVD-Audio discs from optical drives
  • Preview audio streams before extraction with built-in playback
  • Dock integration: Drag files onto the app icon to instantly load them
  • Choose from multiple audio formats: FLAC, M4A, MKA, DSF, or DFF
  • Extract multiple audio streams from the same file
  • Automatically split audio into individual chapter files
  • Extract as one gapless file for continuous playback
  • Add metadata tags and artwork from MusicBrainz
Pro Tip: Create a dedicated folder for extracted audio files to keep your music library organized!

Basic Audio Extraction from MKV Files

1. Add File
2. Select Streams
3. Choose Format
4. Extract

1Adding Your File

There are four ways to add files to Lossless Extract:

  1. Drag and Drop: Simply drag your file from Finder and drop it into the app window (supports MKV, BDMV discs, folders and ISO files, AUDIO_TS folders, DVD-Audio ISO files, SACD ISO files, and Audio CD volumes)
  2. Dock Icon: Drag files directly onto the Lossless Extract icon in your Dock – works even when the app isn’t running! The app will launch and automatically load your files
  3. Open File Button: Click the “Open File” button in the drop zone area
  4. File Menu: Use ⌘O or go to File → Open
Main app window showing the drop zone with Open File button and drag-and-drop area

The main window with drag-and-drop area

Dock Tip: Dragging files onto the Dock icon is the fastest way to start – no need to open the app first!

Once added, the file will appear in the sidebar on the left side of the window.

2Selecting Audio Streams

After adding a file, Lossless Extract automatically scans it and detects all available audio streams. Here’s how to select which streams to extract:

Sidebar showing expanded file with list of audio streams, each with checkbox, codec info, channels, sample rate, and format dropdown

Expanded file view showing detected audio streams

  1. Click on the file name in the sidebar to expand it
  2. You’ll see a list of all detected audio streams with information about each:
    • Codec: The audio format (PCM, DTS-HD MA, Dolby TrueHD, Atmos, MLP, etc.)
    • Channels: Number of audio channels (2.0, 5.1, 7.1, etc.)
    • Sample Rate: Audio quality (48kHz, 96kHz, 176.4kHz, etc.)
    • Language: Audio track language (if available)
  3. Check the box next to each stream you want to extract
  4. Preview streams: Click the play button (▶️) next to any stream to hear it before extraction
  5. You can select multiple streams from the same file

Audio Playback Preview

Preview any audio stream or chapter before extraction with the built-in player:

  • Click the play button (▶️) next to any stream or chapter in the sidebar
  • Playback controls appear in the bottom toolbar with full functionality
  • Seek anywhere: Drag the seek slider to jump to any position in the audio
  • Chapter navigation: Automatically advances to the next chapter when current chapter finishes
  • Volume control: Adjust playback volume with the volume slider
  • Time display: Shows current position and total duration
  • Works with all supported formats (MKV, BDMV, AUDIO_TS, SACD, Audio CD)
  • Supports all codecs: PCM, MLP, DTS-HD MA, Dolby TrueHD/Atmos, DSD
Playback Tip: The player uses AVAudioEngine on MacOS and WASAPI on Windows for high-quality, low-latency playback with full seeking support. Perfect for previewing long tracks and verifying stream quality before extraction.

3Choosing Output Format

For each selected stream, you can choose a different output format using the dropdown menu next to the stream:

Close-up of format selection dropdown menu

Format selection dropdown for each stream

Format Best For Quality
FLAC PCM streams, maximum quality, archival Lossless (100% original quality)
M4A Dolby TrueHD/Atmos and DTS-HD MA streams Lossless (preserves atmos object metadata)
MKA Keeping original codec, compatibility Original (no conversion)
Note: M4A format is only available for Dolby TrueHD/Atmos and DTS-HD MA streams. For PCM streams, only FLAC and MKA options will appear. The app automatically detects Dolby Atmos in TrueHD streams and displays “ATMOS” instead of “TRUEHD” in the stream information.

4Starting the Extraction

Once you’ve selected your streams and formats:

  1. Review your selections in the sidebar
  2. Click the “Extract Audio” button at the bottom of the window
  3. Watch the progress bar as files are extracted
  4. When complete, your audio files will be in the output directory you selected
Bottom toolbar showing Extract Audio button and progress bar during extraction

The Extract Audio button and progress indicator

Extraction Complete! Your audio files are now ready. You can find them in your output directory, and they’ll be named based on the source file name and stream information.

Extracting Audio from Blu-ray BDMV Folders and ISO Files

Lossless Extract can extract audio directly from Blu-ray disc folders and ISO files, making it perfect for archiving concert videos, music documentaries, or any audio content from Blu-ray discs.

1Preparing Your Blu-ray Content

You can use Blu-ray content in two ways:

  • BDMV Folder: A ripped Blu-ray folder structure on your hard drive (recommended for best performance)
  • Blu-ray ISO File: A Blu-ray disc image file (slower extraction, but convenient)
  • Blu-ray DISC: A Blu-ray Audio disc, extract directly from Blu-ray audio optical disc. (note: some bluray video discs may not work. primarily intended for bluray audio discs only. Back up entire disc first and then extracting chapters recommended.

The folder structure should look like this:

Your Disc Folder/
└── BDMV/
├── STREAM/ (contains M2TS video/audio files)
└── PLAYLIST/ (contains MPLS playlist files)
⚠️ Performance Note: For MacOS Blu-ray ISO extraction is significantly slower than folder extraction and in some cases Bluray DISC, especially for later chapters. For best performance, mount the ISO and copy the BDMV folder to your file system before extracting. Folders use direct M2TS file access which is much faster than the ISO protocol. Mac os doesn’t officially support bluray UDF, so mounting Bluray isos can lead to deadlock where the disc can’t be unmounted until a reboot. This is a MacOs UDF implementation issue. We get around this by never mounting bluray isos and looking inside them. This can be slow and with some isos especially non standard homemade ones chapters that span M2TS will fail to extract. If this is happening, manually mount the iso and then drag the folders to your mac and then import to Lossless Extract. Windows natively auto mounts UDF iso with more robust support so this is not an issue.

2Adding Blu-ray Content

You can drag:

  • The Blu-ray Disc from Finder or Explorer
  • The BDMV folder itself
  • The parent folder containing BDMV (the disc root folder)
  • A Blu-ray .iso file
Finder window showing BDMV folder structure, and the app window accepting the drag-and-drop

Dragging Blu-ray content into the app

Simply drag the folder or ISO file or DISC from Finder and drop it into the Lossless Extract window.

Automatic Detection: The app automatically detects BDMV folders and ISO files, finding the best audio streams. It also intelligently selects the MPLS playlist file with the most chapters for optimal extraction. Lossy streams (AC3, DTS Core) are hidden by default; enable “Show lossy streams” in Settings to display them.

3Blu-ray Content Processing

When you add Blu-ray content, Lossless Extract:

  1. Scans the BDMV/STREAM/ folder for M2TS files (or reads from ISO using libbluray)
  2. Analyzes BDMV/PLAYLIST/ for MPLS playlist files
  3. Identifies the MPLS file with the most chapters (usually the main feature)
  4. Detects all available audio streams in the selected playlist
  5. Filters out lossy streams (AC3, DTS Core) by default
  6. Displays the lossless streams in the sidebar for selection
Console showing BDMV processing and stream detection

Console showing Blu-ray processing information

The app automatically handles the complex Blu-ray structure, so you don’t need to manually find M2TS files or playlists!
Folder Access: macOS may prompt you to grant folder or External Disc access permissions. Make sure to allow access to the BDMV folder or ISO file so the app can read the necessary files.

4BDMV Folder Backup (AACS-Encrypted Discs)

For AACS-encrypted physical Blu-ray discs, Lossless Extract can create decrypted BDMV folder backups:

  1. Insert your AACS-encrypted Blu-ray disc
  2. Drag the disc volume from Finder or Explorer into Lossless Extract
  3. The app will detect AACS encryption
  4. Click the “Backup Folder” button next to the disc
  5. Choose a destination folder for the backup
  6. The app will copy all files with automatic AACS decryption

BDMV Backup Features

  • Decode blu-ray: Automatically decode M2TS files during backup
  • Complete Structure: Preserves full BDMV and CERTIFICATE folders
  • Progress Tracking: Real-time progress updates during backup
  • Cancellable: Stop backup at any time with cancel button
Why Backup? Creating decrypted BDMV folder backups provides faster extraction performance and preserves your discs. Backups can be used for audio extraction without needing the physical disc. You must own the disc yourself. Check local laws.
Requirements for AACS Decryption:
  • libaacs library must be installed:
  • AACS key database file (keydb.cfg) must be installed:
    • macOS: ~/Library/Preferences/aacs/keydb.cfg
    • Windows: C:\Users\User\AppData\Roaming\aacs\keydb.cfg
  • The app will guide you through AACS setup if the library or keys are not found.
  • You can obtain keydb.cfg from the FindVUK database online.
Disc Compatibility Disclaimer: Some Blu-ray discs may fail to decrypt if their specific disc key is not present in your keydb.cfg file. If you encounter decryption errors, try updating your key database with the latest keys from the FindVUK database. Not all discs are covered, and newer releases may require updated keys. If there are issues due with disc authoring or key issues stream detection or chapter extraction it is recommend to do a full disc backup, and then import into Lossless Extract. In most cases this will allow chapter extraction.
Note: The backup button only appears when an encrypted Blu-ray disc is detected in an optical drive. For already-ripped folders or ISO files, use the normal extraction process.

Extracting Audio from DVD-Audio Discs

Lossless Extract fully supports DVD-Audio discs, allowing you to extract high-resolution audio from your DVD-Audio collection. The app supports both AUDIO_TS folders and DVD-Audio ISO files.

1Adding DVD-Audio Content

You can add DVD-Audio content in three ways:

  • DVD-Audio Disc: Drag the Disc
  • AUDIO_TS Folder: Drag the AUDIO_TS folder from a ripped DVD-Audio disc
  • DVD-Audio ISO File: Drag the .iso file directly into the app (the app will automatically mount and access the AUDIO_TS folder)
Adding DVD-Audio content to the app

Adding DVD-Audio content to the app

The app automatically detects DVD-Audio content and parses the IFO files to identify all available titles and chapters.

2Understanding DVD-Audio Titles and Streams

DVD-Audio discs can contain multiple titles, each with different audio configurations:

  • Title: A complete audio program (often an album)
  • Chapters: Individual tracks within a title
  • Streams: Different audio formats (MLP, LPCM) and channel configurations (2.0, 5.1, 6.0, etc.)

When you add a DVD-Audio disc, the app displays:

  • All available titles
  • Stream information for each title (codec: MLP or LPCM, channels, sample rate)
  • Chapter count for each title

3Selecting Titles and Streams

To extract audio from a DVD-Audio disc:

  1. Click on the disc name in the sidebar to expand it
  2. You’ll see a list of all available titles
  3. Click on a title to see its available streams
  4. Check the box next to each stream you want to extract
  5. Select the output format (FLAC is recommended for DVD-Audio)
Stream Selection: DVD-Audio titles often have multiple streams with different channel configurations. For example, a title might have a 2.0 stereo stream and a 5.1 or 6.0 surround stream. Choose the stream that matches your playback setup.

4Backup Feature for Encrypted Discs

If you have a DVD-Audio disc in an optical drive, Lossless Extract can automatically backup the entire disc:

  1. Insert your DVD-Audio disc into the optical drive
  2. A “Backup Folder” button will appear in the app
  3. Click the button to start the backup process
  4. The app will automatically:
    • Decode the disc contents
    • Copy the AUDIO_TS folder (and VIDEO_TS if present) to your hard drive
    • Save the backup to a location you choose
Backup button appears when a DVD is in an optical drive

Backup button appears when a DVD is in an optical drive

Note: The backup button only appears when a DVD is detected in an optical drive. For already-ripped folders or ISO files, use the normal extraction process.

DVD-Audio Format Support

Lossless Extract supports all standard DVD-Audio formats:

  • MLP (Meridian Lossless Packing): Compressed lossless audio, supports high sample rates (96kHz, 192kHz) and multi-channel (up to 6.0)
  • LPCM (Linear PCM): Uncompressed audio, typically 2.0 stereo at various sample rates
  • Sample Rates: 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz
  • Channel Configurations: 2.0, 4.0, 5.1, 6.0, and other surround formats

Extracting Audio from SACD ISO Files

Lossless Extract supports Super Audio CD (SACD) ISO files, allowing you to extract high-resolution DSD audio from your SACD collection. You can work with existing SACD ISO files or create them via network extraction from compatible Blu-ray players.

1Getting SACD ISO Files

There are two ways to obtain SACD ISO files:

Method 1: Network SACD Extraction

  1. Go to File → Network SACD… (⌘⇧N) on mac or click the hamburger icon on Windows
  2. Enter your compatible Blu-ray player’s IP address or click scan (you can then click the found players IP to add it.
  3. Click Extract to ISO to rip SACD disc directly over network
  4. The ISO file will be created in your output directory (10-30 minutes)
  5. Drag the resulting ISO back into the app to extract DSD/DSF files
Network SACD Dialog

Network SACD extraction dialog

Testing Connection

Testing connection to SACD player

Extracting SACD to ISO

Extracting SACD disc to ISO file

SACD Extraction Complete

SACD extraction completed successfully

Compatible Players: Network SACD extraction requires a Blu-ray player with a MediaTek chipset (2012–2017 models). A USB flash drive with AutoScript is also required. See the Network SACD setup guide in the app for complete instructions.

Sony

  • BDP-S390 / BX39
  • BDP-S490
  • BDP-S590 / BX59
  • BDP-S4100
  • BDP-S5100 / BX510 (Most Common)
  • BDP-S6200 / BX620
  • BDP-S6500 / BX650
  • BDP-S6700 (Only certain early production is compatible)
  • BDP-S7200
  • BDP-S790
  • BDP-A6000
  • BDV-E190
  • BDV-NF720
  • UHP-H1 (Only certain early production is compatible)
  • UBP-X800 (Only certain early production is compatible)

Pioneer

  • BDP-53FD
  • BDP-80FD
  • BDP-140
  • BDP-440
  • BDP-150
  • BDP-450
  • BDP-160
  • BDP-170
  • MCS-FS232

Oppo

  • BDP-93 and 95
  • BDP-103 / 103D
  • BDP-105 / 105D
  • UDP-203 and 205

Cambridge Audio

  • Azur 752BD
  • CXU

Arcam

  • FMJ UDP411
  • FMJ CDS27

Other Brands

  • Primare BD32 MkII
  • Electrocompaniet EMP3
  • Denon DBT-3313UD
  • MSB Universal Media Transport V
  • Yamaha BD-S677
  • Marantz UD5007 / UD7007

Where to Find: These players are no longer in production but are readily available on eBay ($20–60), thrift stores ($10–30), and Facebook Marketplace / Craigslist. The Sony BDP-S5100 / BX510 is the most common.

Method 2: Use Existing SACD ISO

  1. Make sure you have an SACD ISO file (from previous rip or network extraction)
  2. Drag the .iso file directly into the Lossless Extract window
  3. The app will automatically detect it as an SACD ISO and scan for audio tracks

2Selecting SACD Tracks

After adding an SACD ISO, the app will display:

  • All available audio tracks from the SACD
  • Track information (duration, DSD format)
  • DSD layer information (stereo, multi-channel if available)
  1. Click on the SACD ISO file name in the sidebar to expand it
  2. Check the box next to each track you want to extract
  3. Select your preferred output format (DSF, DFF, or FLAC)

3Choosing SACD Output Format

SACD audio can be extracted in three formats:

  • DSF (DSD Stream File): Native DSD format, widely supported, includes metadata support. Uncompressed DSD much larger file size
  • DFF (DSD Interchange File Format): Compressed DSD format, less common but still supported
  • FLAC: Converted to PCM format, excellent compatibility, slightly larger files
Format Recommendation: DSF is the recommended format for SACD extraction as it preserves the native DSD audio and has excellent player support. Use FLAC if you need maximum compatibility with players that don’t support DSD.

FLAC Sample Rate Options

When extracting SACD to FLAC format, you can choose the sample rate:

  • 88.2 kHz: Standard high-resolution option, excellent quality with good file size balance
  • 176.4 kHz: Ultra high-resolution option, maximum quality for audiophile applications

The sample rate option is available in the app’s settings when FLAC is selected as the output format for SACD files.

ReplayGain Tags (SACD to FLAC)

When converting SACD to FLAC format, you can optionally add ReplayGain tags for volume normalization:

  • ReplayGain checkbox: Enable to add ReplayGain metadata to your FLAC files
  • Volume normalization: Automatically analyzes audio levels and adds tags for consistent playback volume
  • 2-pass process: First converts DSF to FLAC, then analyzes and adds ReplayGain tags
  • Player support: Works with players that support ReplayGain (Kodi, foobar2000, VLC, and many others)

Note: Enabling ReplayGain increases conversion time as the audio must be analyzed after conversion.

SACD Audio Quality

SACD uses Direct Stream Digital (DSD) encoding, which provides:

  • High Resolution: DSD64 (2.8MHz) or DSD128 (5.6MHz) sampling
  • Stereo and Multi-Channel: Many SACDs include both stereo and surround sound layers
  • Superior Audio Quality: Often considered superior to standard CD quality

The app automatically detects and extracts the available DSD layers from your SACD ISO file.

Ripping Audio from Audio CDs

Lossless Extract supports ripping standard Audio CDs directly from your optical drive, with automatic metadata retrieval from MusicBrainz and AcoustID fingerprinting for accurate track identification.

1Inserting an Audio CD

To rip audio from a CD:

  1. Make sure you have “show cds/dvds on your desktop” checked in Finder settings
  2. Insert an Audio CD into your Mac’s optical drive (internal or external USB)
  3. The CD will automatically mount at /Volumes/Audio CD
  4. Drag the mounted Audio CD volume into Lossless Extract
  5. The app will read the CD’s Table of Contents (TOC) and display all tracks
Audio CD in Lossless Extract

Audio CD with track list and metadata

Automatic Metadata: On first insertion, the app automatically queries MusicBrainz to retrieve album, artist, and track names. This metadata is saved and will be remembered for future insertions of the same disc.

2Selecting CD Tracks

After the CD loads:

  • The artist name appears as the file title (falls back to “Audio CD” if unknown)
  • Album name and artist are shown above the track list
  • Each track shows its number, title, and duration
  • Total disc size is calculated from audio data (Red Book standard)
  1. Click the artist name to expand the track list
  2. Check the box next to each track you want to rip
  3. Or use “Select All” / “Deselect All” buttons below the track list
  4. Select your preferred output format (FLAC, WAV, or MKA)
Selection Counter: The status shows “X/Y selected” (e.g., “8/12 selected”) to help you track your selection. Orange means nothing selected, green when tracks are selected.

3Metadata and Track Identification

Audio CDs support multiple metadata sources:

  • MusicBrainz: Automatic lookup on first insert using disc ID
  • AcoustID: Fingerprint-based identification for accurate track matching
  • Manual Editing: Double-click any track name to edit it

Using AcoustID Fingerprinting

For more accurate track identification:

  1. Select the tracks you want to identify
  2. Click the fingerprint icon next to the artist name
  3. The app will fingerprint the first selected track (takes about 30 seconds)
  4. Track names will be updated with AcoustID results
Metadata Priority: The app uses a “last-write-wins” system. If you run AcoustID, it overwrites previous metadata. If you manually edit a track name, you can run AcoustID again to replace it with fingerprinted data, or manually edit it back.

Manual Track Editing

To manually edit track names:

  1. Double-click any track name in the list
  2. Type the new name (or delete all text to reset to automatic metadata)
  3. Press Enter or click outside to save
Clearing Edits: To remove your manual edit and revert to automatic metadata, double-click the track name, delete all text, and press Enter. This allows the automatic metadata to show through again.

4CD Output Formats

Audio CDs can be ripped to three formats:

  • FLAC: Lossless compression, excellent quality, smaller file sizes (recommended)
  • WAV: Uncompressed PCM audio, larger files
  • MKA (Matroska Audio): Container format with metadata support
Format Recommendation: FLAC is recommended for Audio CDs as it provides lossless compression (saves ~50% space) while maintaining perfect audio quality and excellent metadata support.

5CD Playback and Preview

You can preview tracks before ripping:

  1. Select one or more tracks
  2. Click the Play button in the playback controls
  3. Use Next/Previous buttons to skip between selected tracks
  4. Use the seek slider to navigate within a track
  5. Click Stop to end playback
Direct AIFF Playback: CD tracks are played directly from the mounted volume as AIFF files, providing instant playback with full seeking support.

Audio CD Technical Details

  • Format: Red Book Audio CD standard (44.1 kHz, 16-bit, stereo)
  • Disc ID: MusicBrainz disc ID generated from TOC for metadata lookup
  • Metadata Storage: Saved as cdid_*.xml files in ~/Library/Application Support/LExt/Metadata/
  • Extraction Method: Direct sector reading at 2352 bytes per sector
  • Persistent Metadata: Track names, edits, and identifications are remembered for each disc

CD Mounting Considerations

⚠️ Important: Avoid accessing the CD volume in Finder while ripping or during metadata operations. The app needs exclusive access to read the disc reliably.

If the CD unmounts unexpectedly during use, eject and re-insert the disc. The app will reload your previous selections and metadata automatically.

Editing Chapter and Track Names

Customize chapter and track names before extraction to ensure your files have proper titles. This feature works for all disc formats.

How to Edit Names

  1. Select a title or stream in the sidebar
  2. Double-click any chapter or track name
  3. An edit dialog will appear with the current name
  4. Enter your new name (or leave empty to reset to default)
  5. Click “Save” or press Enter to apply
Quick Edit: Simply double-click any chapter name to start editing. No menus needed!

Where Edited Names Appear

  • Filenames: Individual chapter files use your custom names (e.g., Album-Chapter 01-Breathe.flac)
  • CUE Sheets: Track titles in CUE files reflect your edits
  • Metadata Tags: Track titles are embedded in the audio file metadata

Automatic MusicBrainz Lookup (CD)

For CD discs, Lossless Extract can automatically fetch track names from MusicBrainz:

  • Load a CD into the app
  • Lossless Extract automatically queries MusicBrainz using disc ID
  • Track names and artwork populate automatically if a match found
  • Manual editing and Audio Finger printing will still be available for any track
Note: MusicBrainz lookup currently works for CD discs only. For DVD-Audio and Blu-ray, use manual editing.
Persistence: Edited chapter names are saved per disc/file. Remove and re-add the same disc to keep your edits.

Chapter Extraction vs. Gapless File

For BDMV folders and MKV files that contain chapters, Lossless Extract gives you two extraction options. Understanding the difference will help you choose the right method for your needs.

📁 Individual Chapters (Default)

What it does: Extracts each chapter as a separate audio file.

Best for:

  • Albums where each chapter is a song
  • When you want separate track files
  • Creating a playlist with individual tracks

File naming: Album Name - Chapter 01.flac, Album Name - Chapter 02.flac, etc.

🎵 Gapless File (Checked)

What it does: Extracts the entire stream as one continuous file.

Best for:

  • Gapless playback experiences
  • Live recordings meant to be continuous
  • When you want the complete album as one file

File naming: Album Name.flac (single file)

How to Choose

The “Gapless File” checkbox appears in the bottom toolbar when you have files with chapters selected (BDMV folders, Blu-ray ISOs, MKV files, DVD-Audio discs, or SACD discs).

Gapless File checkbox in the bottom toolbar

The Gapless File checkbox in the bottom toolbar

  1. Unchecked (Default): Extracts individual chapter files
    • Perfect for most music albums
    • Each song becomes its own file
    • Easy to organize and play individual tracks
  2. Checked: Extracts one continuous file
    • No chapter splitting
    • One file for the entire duration
    • Maintains perfect gapless playback
Real-World Example: For a concert Blu-ray with 12 songs, “Individual Chapters” gives you 12 separate files (one per song). “Gapless File” gives you one long file with all 12 songs seamlessly connected.
Note: The “Gapless File” option only appears for BDMV folders, Blu-ray ISOs, MKV files, DVD-Audio discs, and SACD discs. Regular video files without chapters always extract as one complete file.

CUE Sheet Generation

When you enable the “Gapless File” option, you also have the choice to generate a CUE sheet file alongside your audio.

What is a CUE Sheet?

A CUE sheet (.cue file) is a text file that contains track index points for a single audio file. Think of it as a “table of contents” that tells your media player where each track begins within the gapless file.

Benefits of CUE Sheets

  • Track Navigation: Jump to individual tracks within a gapless file
  • Perfect Playback: Maintains gapless transitions while showing track markers
  • Metadata Display: Media players show individual track positions and names
  • Best of Both Worlds: One file for seamless playback + individual track access

Without CUE Sheet

  • One continuous audio file
  • No track markers or navigation
  • Must manually seek to find specific sections
  • Media player shows total duration only

With CUE Sheet

  • Same single audio file
  • Plus a .cue text file with track indexes
  • Click tracks to jump instantly
  • Media player shows current track and position

Supported Formats

CUE sheet generation is available for all disc types when using gapless extraction:

  • Blu-ray Discs: BDMV folders and Blu-ray ISOs
  • MKV Files: Matroska files with chapter markers
  • DVD-Audio: AUDIO_TS folders and DVD-Audio ISOs
  • SACD: Super Audio CD ISOs (all formats: DSF, DFF, FLAC)
  • CD: Audio CDs (all formats: FLAC, WAV, MKA)
How to Use: Simply check both “Gapless File” and “CUE Sheet” in the bottom toolbar before extracting. You’ll get your audio file plus a matching .cue file. Most media players (Foobar2000, VLC, JRiver) can open the CUE file directly for full track navigation.
Real-World Example: Extract a Pink Floyd album with “Gapless File” + “CUE Sheet” enabled. You get one seamless Dark Side of the Moon.flac file that plays continuously, plus Dark Side of the Moon.cue that lets you jump to “Time”, “Money”, or any other track instantly.

Adding Metadata Tags and Artwork

After extracting your audio files, you can add professional metadata tags including album name, artist, track titles, year, and artwork. This makes your files easy to organize and display correctly in music players.

Important: The manual tagging panel only works for files located in the root output directory and processes one album at a time. Make sure all files for the album you want to tag are in the main output folder before applying tags.

1Opening the Tags Panel

Click the “Tags” button in the bottom toolbar to open the metadata tagging interface.

Opening the Tags panel from the bottom toolbar

Opening the Tags panel from the bottom toolbar

2Searching for Album Information

Lossless Extract uses MusicBrainz, a comprehensive music database, to find album information:

  1. Enter the Artist name in the search field
  2. Enter the Album name
  3. Click “Search”
  4. Browse through the search results
  5. Click on an album to select it
Searching for album information in the Tags panel

Searching for album information in the Tags panel

When you select an album, you’ll see:

  • Album artwork preview on the right side
  • Track listing information
  • Release year and other metadata

3Applying Tags to Files

Once you’ve selected an album:

  1. Review the album information and artwork
  2. Click “Save Tags to Files”
  3. The app will automatically:
    • Tag all extracted files in your output directory
    • Embed the album artwork
    • Rename files based on track titles
    • Add artist, album, year, and track number metadata
Tagging Complete! Your audio files now have professional metadata and will display correctly in iTunes, Music.app, Spotify, and other music players.

Custom Artwork

If you want to use your own artwork instead of the MusicBrainz image:

  1. Open the “Console” tab in the bottom panel
  2. Drag and drop a JPG or PNG image into the artwork area
  3. The custom artwork will be used when you save tags
Adding custom artwork in the Console tab

Adding custom artwork in the Console tab

You can also right-click on any artwork to save it as an image file.

Pro Tip: Make sure you’ve extracted your audio files before adding tags. The tagging feature only works on files that are already in your root output directory and only for one album at a time.

Audio Fingerprinting

Audio Fingerprinting icon

Click the fingerprint icon to identify albums

Lossless Extract can automatically identify albums and retrieve track names using audio fingerprinting technology. This works for all formats including DVD-Audio, SACD, Blu-ray, and MKV files.

How It Works

Audio fingerprinting analyzes the actual audio content to identify the track, similar to apps like Shazam:

  1. Select a chapter or track in the sidebar
  2. Click the fingerprint icon button
  3. The app extracts a 120 sample and generates an audio fingerprint
  4. Queries AcoustID and MusicBrainz databases
  5. If found, automatically applies track names to all chapters

Best Results

  • Try Track 2 or 3: If Track 1 doesn’t find a match, try fingerprinting Track 2 or 3 instead
  • Stereo Stereo finger printing is usually more accurate than surround titles
  • Progress indicator: Shows progress during extraction, fingerprinting, and database lookup
Automatic Album Identification! When successful, all track names are automatically applied to your chapters. Perfect for DVD-Audio and SACD discs where metadata may be missing.
Note: Audio fingerprinting requires the track to be in the AcoustID database. Not all DVD-Audio and SACD discs are indexed yet. For discs not found, you can manually edit track names or use the MusicBrainz search in the Tags panel.

Understanding Output Formats

Lossless Extract supports three output formats, each optimized for different use cases. Understanding when to use each format will help you get the best results.

FLACFLAC (Free Lossless Audio Codec)

Best for: PCM streams, maximum quality preservation, archival purposes, SACD conversion

  • Quality: 100% lossless – no quality loss
  • File Size: Large (typically 30-50MB per minute for stereo)
  • Compatibility: Excellent – supported by most modern players
  • Use when: You want the absolute best quality and have storage space
  • SACD FLAC Options: When extracting SACD to FLAC, you can choose between 88.2 kHz or 176.4 kHz sample rates for optimal quality and compatibility

M4AM4A (Dolby TrueHD/Atmos / DTS-HD MA)

Best for: Dolby TrueHD, Dolby Atmos, and DTS-HD MA multi-channel audio streams

  • Quality: Lossless – preserves the original codec
  • File Size: Large (similar to FLAC for multi-channel)
  • Compatibility: Good – works with Apple devices and many players
  • Use when: Extracting Dolby TrueHD, Dolby Atmos, or DTS-HD MA streams
  • Atmos Detection: The app automatically detects Dolby Atmos in TrueHD streams and displays “ATMOS” in the stream information
  • Note: Only available for these specific codec types

DSF/DFFDSF / DFF (SACD Formats)

Best for: SACD ISO files, preserving native DSD audio

  • Quality: Native DSD – preserves original DSD encoding
  • File Size: Large (DSD64 files are typically 10-15MB per minute)
  • Compatibility: Good – DSF is widely supported, DFF is less common
  • Use when: Extracting from SACD ISO files and you want native DSD format
  • Note: Only available for SACD ISO files

MKAMKA (Matroska Audio)

Best for: Keeping the original audio codec, maximum compatibility

  • Quality: Original – no conversion, preserves source codec
  • File Size: Varies based on source
  • Compatibility: Excellent – Matroska is widely supported
  • Use when: You want to preserve the exact original audio format

DSCDSC (Direct Stream Copy)

Best for: Raw codec streams, custom workflows, professional audio work

  • Quality: Original – no conversion or container overhead
  • File Size: Smallest – raw stream without container
  • Speed: Fastest extraction method
  • Compatibility: Limited – requires compatible player or further processing
  • Use when: You need the raw audio stream for custom processing or professional workflows
Format Selection Guide: For most music extraction, FLAC is the recommended choice. It provides perfect quality and excellent compatibility. Use M4A only when extracting Dolby TrueHD/Atmos or DTS-HD MA streams, use DSF/DFF for SACD ISO files, use MKA when you specifically need to preserve the original codec, and use DSC for raw streams or custom workflows.

Troubleshooting Common Issues

No Audio Streams Detected

Problem: The app doesn’t show any audio streams after adding a file.

Solutions:

  • The file may not contain audio tracks – verify the file has audio
  • Try using the manual stream entry option if available
  • Check the Console tab for error messages
  • Verify the file isn’t corrupted by trying to play it in another app

BDMV Folder Not Working

Problem: BDMV folder extraction fails or doesn’t detect streams.

Solutions:

  • Make sure you’re dragging the BDMV folder or its parent folder
  • Verify the folder structure includes both BDMV/STREAM/ and BDMV/PLAYLIST/
  • Grant folder access permissions when prompted by macOS
  • Check the Console tab for specific error messages
  • Try the “Gapless File” option if chapter extraction isn’t working

DVD-Audio Not Detecting Streams

Problem: DVD-Audio disc or folder doesn’t show any streams.

Solutions:

  • Make sure you’re dragging the AUDIO_TS folder or a DVD-Audio ISO file
  • Verify the AUDIO_TS folder contains IFO files (AUDIO_TS.IFO, ATS_01_0.IFO, etc.)
  • For ISO files, ensure it’s a DVD-Audio ISO, not a video DVD ISO
  • Grant folder access permissions when prompted by macOS
  • Check the Console tab for specific error messages
  • Some discs may have encrypted content – use the Backup feature if the disc is in an optical drive

SACD ISO Not Working

Problem: SACD ISO file doesn’t extract or shows no tracks.

Solutions:

  • Verify the file is a valid SACD ISO (not a regular CD or DVD ISO)
  • Check the Console tab for specific error messages
  • Ensure the ISO file isn’t corrupted – try opening it with another tool to verify
  • Some SACD ISOs may have copy protection – ensure you have a properly ripped ISO

Chapter Extraction Not Working

Problem: Chapters aren’t being split into separate files.

Solutions:

  • Some BDMV folders may not have chapter information in MPLS files
  • Check the Console tab to see which MPLS file was selected
  • Try using “Gapless File” to extract the entire stream as one file
  • For MKV files, verify the file actually contains chapter markers
  • The app automatically selects the MPLS with the most chapters – this may not always be the main feature

Extraction Fails or Crashes

Problem: Extraction process fails or the app crashes.

Solutions:

  • Check the Console tab for detailed error messages
  • Ensure you have enough disk space (audio files can be large)
  • Verify the output directory is writable and accessible
  • Try a different output format
  • Make sure the source file isn’t corrupted
  • Close other applications to free up system resources

Tags Not Appearing

Problem: Metadata tags don’t show up in music players.

Solutions:

  • Make sure you’ve extracted the audio files first (tags only apply to existing files)
  • Verify files are in the output directory
  • Check that you selected an album and clicked “Save Tags to Files”
  • Some players may need to refresh or rescan to show new tags
  • Try opening the file in a different player to verify tags are embedded

Metadata Display or Corruption Issues

Problem: Metadata displays incorrectly or you would like to reset all metadata.

Solutions:

  • Delete the Metadata folder or individual XML file at ~/Library/Application Support/LExt/Metadata for mac or C:\Users\User\AppData\Local\LosslessExtract\Metadata for windows. This will reset metadata for the input source.

Output Directory Issues

Problem: Files aren’t being saved or can’t find output directory.

Solutions:

  • If the output folder no longer exists, the app will prompt you to select a new one
  • Click “Choose…” next to the Output label to select a new directory
  • Double-click the output path to open it in Finder and verify files are there
  • Make sure you have write permissions for the selected folder
Getting Help: The Console tab at the bottom of the window shows detailed information about what the app is doing. If you encounter issues, check the Console for specific error messages that can help diagnose the problem.

System Requirements

  • macOS: 13.0 Ventura or later
  • Windows: 10.0 Windows 10 64bit 1809+ or later
  • Architecture: Universal binary – works on both Intel and Apple Silicon Macs, arm64 apple silicon only, x86_64 Intel mac or apple silicon via rosetta
  • Storage: Sufficient disk space for extracted audio files (FLAC files can be 30-50MB per minute, DSD files 10-15MB per minute)
  • Internet: Required for metadata tagging (MusicBrainz search)
  • Optical Drive: Required only for the DVD-Audio/Bluray backup feature and extraction (optional)