2013-08-20, 20:15
(2013-08-20, 11:24)jjd-uk Wrote: Going back to GUI sounds I've some new observations from when I was investigating my music playback distortion.
WASAPI - HDMI does after all output GUI sounds with stream silence disabled, however it seems to queue up a load of sounds then plays out in a burst, so I never heard them on my 1st round of tests because I wasn't carrying out enough GUI actions before starting playback. Take a long list and start scrolling, I probably get about 15 items down then sound will suddenly kick in with a quick burst of about 2 sec of multiple clicks that seem to have been buffered, then it will go silent again until you gone down another 15 or so items and then you get another burst of clicks, and so on.
Directsound - HDMI outputs GUI sounds with no problems with or without stream silence.
I think the problem with WASAPI is that it won't start playing until the buffer is filled completely. A click sound is too short. The best idea I have is to ask the sink whether it supports drain mode and enable streamsilence if not. Further implement a mode to release the sink after some period of idle regardless if streamsilence is chosen.
