Date: Mon, 17 May 2021 00:19:17 +0200 From: Hans Petter Selasky <hps@selasky.org> To: evgeniy@khramtsov.org, freebsd-multimedia@freebsd.org Subject: Re: Silent noise while running simple OSS program and moving mouse? Message-ID: <d9008a76-5377-0fcb-e94a-ef443bb8c451@selasky.org> In-Reply-To: <b18ca6ae-4754-2d52-3a16-b8835471fa54@selasky.org> References: <YKGWO6L9NTikr1ZI@vax.khramtsov.org> <b18ca6ae-4754-2d52-3a16-b8835471fa54@selasky.org>
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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
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