PCM audio playback got interrupted on Node 20

[jimchen5209]

Not sure what's changed in Node 20 to affect this.

After upgrading Node from 18 to 20, the voice got interrupted at about 200ms when I attempted to play a PCM file, without any error or disconnection.
It works fine when I play an OPUS file.
If I downgrade to Node 18, everything works fine again.

I've tested across Node 18 to 21, it breaks only on version >= 20.

I've created a repo to reproduce this bug at https://github.com/jimchen5209/eris-node20-bug.

[jimchen5209]

After debugging and searching, the problem is at node.js' side.
The issue is nodejs/node#51930.
Fixed by applying workaround highWaterMark variable to 1 at lib/voice/streams/BaseTransformer.js or downgrading node.js to 20.9.0.