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

From: Hans Petter Selasky <hps_at_selasky.org>
Date: Sun, 16 May 2021 22:19:17 UTC 
On 5/17/21 12:17 AM, Hans Petter Selasky wrote:
> On 5/17/21 12:01 AM, Evgeniy Khramtsov via freebsd-multimedia wrote:
>> Hi.
>>
>> I wrote this simple OSS program that outputs sound from microphone back
>> to the speakers (the close() and stuff is omitted):
>> https://pastebin.com/raw/yX4gm5fL
>>
>> It works, though for some reason I get some silent noise while moving
>> mouse around. Any ideas what could be wrong? Thanks.
>>
> 
> Hi,
> 
> Are you using a professional balanced audio microphone? If no, then 
> information is leaking via ground on the mainboard :-(
> 
> Been there done that :-)
> 

Hi,

A possible solution:

Use qaudiosonar to find the frequency.

Start virtual_oss with EQ support to filter away the frequency.

--HPS