Underflow and ALSA underrun issues.

Open

#253 opened on May 16, 2026 2 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty: 4/5
Estimated time: 3-5 days
Newbie friendliness: 38/100

Issue type: Bug
Clarity: Needs clarification
Activity status: Quiet
Tech stack: python
Domain: audio-video-rtc, cli

Research direction

Reproduce playback with the CM108B USB DAC on version 7.3.1 and capture the underflow and ALSA underrun behavior during stream startup. Start by tracing the player’s audio-output path and compare it with the pull request mentioned in the report; done means startup no longer takes 5–10 seconds and playback has no audio drops.

Written by the indexing model from the issue text.

Description

Hi there,

I am just starting to get dedicated hardware players for music assistant and decided to buy a USB DAC centered around the CM108B chipset. I am having an issue where, when starting an audio stream, there is a large amount of underflow errors and ALSA lib pcm.c:8740:(snd_pcm_recover) underrun occurred errors. This causes the stream to start delayed (approx. 5-10 seconds after pressing play) and also leads to audio drops occasionally. I saw the pr that was supposed to fix this issue, but I just installed 7.3.1.

I tried troubleshooting by changing the codecs/audio formats and also directly connecting to a brand new MA server just to make sure my previous setup wasn't causing an issue.

Would also like to note, all other sendspin players (web, android, chromecast) do not have any issues.

I love where this project and format is going and can't be any more appreciative of the work everyone puts into this.

Thank you!

Dominant language: Python
Stars: 190
Forks: 36
Avg merge: 11d 19h
Merged PRs (30d): 2

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