Continuous transmission causes delays with unstable connection.

[MarioPL98]

Description

When using continuous transmission with unstable connection, there is up to 5-10 seconds delay accumulating over time. Muting does seem to remove the delay for a short while BUT when using "deafen yourself", the person's icon stays blue for the duration of the delay and only after that goes green (muted). Switching channels when there is a delay also causes the delayed audio to play after channel is switched. Example:

Versions affected:
tested 1.3.x and 1.4.x on Windows with same server versions

Probably related to:
#1617

I've noticed few times that the bug also happens when computer running mumble has high cpu usage or interrupts causing short system freezes. Just like with unstable connection, continuous mode gets delays.

Steps to reproduce

1. Join server with a good connection.
2. Make someone join the same server with a bad connection or simulated bad (ping variation 50-500ms, 0-2% packet loss).
3. Turn on continuous transmission mode.
4. Wait 10 minutes.

Mumble version

1.4.287

Mumble component

Both

OS

Windows

Reproducible?

Yes, very. Always happens with the same users with weaker connection.

Additional information

Possible solution:
Check amount of audio in buffer / queue and either skip delay or speed up the sound (maybe let user decide in settings).

[MarioPL98]

@Krzmbrzl I can try to look into the issue but can you give me any ideas, where to start?