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refactor(voice): Strict type checking in voice internals & DAVE Support (rec)#3159

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fix/voice-rec-2
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refactor(voice): Strict type checking in voice internals & DAVE Support (rec)#3159
Paillat-dev wants to merge 7 commits intomasterfrom
fix/voice-rec-2

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Summary

Information

  • This PR fixes an issue.
  • This PR adds something new (e.g. new method or parameters).
  • This PR is a breaking change (e.g. methods or parameters removed/renamed).
  • This PR is not a code change (e.g. documentation, README, typehinting,
    examples, ...).

Checklist

  • I have searched the open pull requests for duplicates.
  • If code changes were made then they have been tested.
    • I have updated the documentation to reflect the changes.
  • If type: ignore comments were used, a comment is also left explaining why.
  • I have updated the changelog to include these changes.
  • AI Usage has been disclosed.
    • If AI has been used, I understand fully what the code does

Discord enforces DAVE (E2E encryption) on all voice channels. py-cord
currently decodes Opus packets before stripping the DAVE application-layer
encryption, causing OpusError: corrupted stream and making voice reception
completely non-functional.

Changes:
- reader.py: Rewrite decrypt_rtp() to call dave.decrypt() BEFORE Opus
  decoding. Handles SSRC-to-user_id race condition by trying all known
  DAVE user IDs when the mapping is not yet populated, then caching the
  result. Falls back to OPUS_SILENCE on decrypt failure.
- opus.py: Remove erroneous dave.decrypt() call in _decode_packet() that
  was applied to already-decoded PCM data, corrupting the audio stream.
- router.py: Catch OpusError and AssertionError in _do_run() gracefully,
  emitting a single warning instead of crashing the router thread.

Fixes: #3139
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pycord-app bot commented Mar 19, 2026

Thanks for opening this pull request!
Please make sure you have read the Contributing Guidelines and Code of Conduct.

This pull request can be checked-out with:

git fetch origin pull/3159/head:pr-3159
git checkout pr-3159

This pull request can be installed with:

pip install git+https://github.com/Pycord-Development/pycord@refs/pull/3159/head

@Paillat-dev Paillat-dev added this to the Next minor rc1 milestone Mar 19, 2026

data.seek(0)
output = BytesIO()
with wave.open(output, "wb") as f:
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See if similar is required by other sinks or if it's even needed here idk if we might actually be better of undoing this. Test the other sinks

if uid:

if not uid:
# SSRC -> user_id mapping not yet populated (race with member_connect).
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"Bruteforcing" like this is ugly and hacky. See if we can have polling & timeout instead or similar.

finally:
self.reader.client.stop_recording()
try:
self.reader.client.stop_recording()
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Is this breaking ?

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changeling

@Lulalaby Lulalaby added help wanted Extra attention is needed priority: medium Medium Priority status: in progress Work in Progess dependencies Pull requests that update a dependency file feature Implements a feature hold: changelog This pull request is missing a changelog entry hold: testing This pull request requires further testing voice Related to the voice chat feature labels Mar 22, 2026
@github-project-automation github-project-automation bot moved this to In Progress in Pycord Releases Mar 22, 2026
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Labels

dependencies Pull requests that update a dependency file feature Implements a feature help wanted Extra attention is needed hold: changelog This pull request is missing a changelog entry hold: testing This pull request requires further testing priority: medium Medium Priority status: in progress Work in Progess voice Related to the voice chat feature

Projects

Status: Todo

4 participants