Re: Silent noise while running simple OSS program and moving mouse?

From: Evgeniy Khramtsov via freebsd-multimedia <>
Date: Sun, 16 May 2021 22:56:36 UTC
> Is it gaps in the sound?

According to OSS documentation at, read and write are
blocking until there should be enough data for a buffer. If I don't
touch mouse, e.g. typing only or doing some CPU stress stuff, there
is no noise. But once I move mouse around, there is some silent noise.

> Maybe post a recording of it.

Writing to a fd doesn't produce a formatted .wav file, unfortunately.
I'll report later once I figure out this and how to output as .wav.

On Sun, May 16, 2021 at 03:36:49PM -0700, John-Mark Gurney wrote:
> Evgeniy Khramtsov via freebsd-multimedia wrote this message on Mon, May 17, 2021 at 01:01 +0300:
> > I wrote this simple OSS program that outputs sound from microphone back
> > to the speakers (the close() and stuff is omitted):
> >
> > 
> > It works, though for some reason I get some silent noise while moving
> > mouse around. Any ideas what could be wrong? Thanks.
> Can you define silent noise better?  Maybe post a recording of it.
> Is it gaps in the sound?  where there's a gap in either playback
> or recording and it's absolutely silent, or do you mean that there's
> an additional sound that only appears when you move the mouse?
> -- 
>   John-Mark Gurney				Voice: +1 415 225 5579
>      "All that I will do, has been done, All that I have, has not."