Summary

Discord voice channel join succeeds, but the bot does not speak/respond in voice. Logs show voice receive decrypt failures.

Environment

• OpenClaw version: 2026.2.23 (b817600)
• Host: macOS (arm64)
• Node: v25.6.1
• ffmpeg: installed (/opt/homebrew/bin/ffmpeg)
• Discord native commands: enabled
• Discord voice config: enabled with TTS OpenAI/alloy

Config (relevant)

{
  "channels": {
    "discord": {
      "voice": {
        "enabled": true,
        "tts": {
          "provider": "openai",
          "openai": { "voice": "alloy" }
        }
      }
    }
  }
}

What works

• /vc join now succeeds and bot joins/stays in the voice channel.
• Bot has Connect + Speak permissions.
• Gateway remains up (no immediate crash after join in latest repro).

What fails

• Bot does not talk/respond in voice channel.
• No audible TTS playback after user speech.

Logs

{"subsystem":"discord/voice"} discord voice: receive error: Failed to decrypt: DecryptionFailed(UnencryptedWhenPassthroughDisabled)

Also observed earlier in same environment (prior runs) that /vc join could crash with:

Cannot utilize the DAVE protocol as the @snazzah/davey package has not been installed.

After restart/new repro, this hard crash was not present, but voice still does not function due to decrypt failures.

Repro steps

1. Configure channels.discord.voice.enabled=true with voice.tts set.
2. Start/restart gateway.
3. In Discord guild text channel, run /vc join.
4. Confirm bot joins VC.
5. Speak in VC (e.g., "can you hear me?").
6. Observe no voice response and decryption warning in logs.

Expected behavior

Bot should receive/decrypt inbound audio and produce spoken responses in VC.

Actual behavior

Bot joins VC but cannot process inbound audio due to DecryptionFailed(UnencryptedWhenPassthroughDisabled) and remains silent.

Notes

• Related recently-closed issues appear focused on Opus packaging/update failures (#23737, #23733, #23703).
• This appears to be a separate runtime voice decrypt path issue.