Date: Mon, 29 Mar 2021 11:55:46 +0300 From: Softwafe Engineer <timsofteng@gmail.com> To: Hans Petter Selasky <hps@selasky.org> Cc: freebsd-multimedia@freebsd.org Subject: Re: Distorted sound with external usb-device and bitperfect Message-ID: <CAP7bFfAVVO=m2=YiqL5Kc_9pEpBCnnHEGVhhHer589THdWnLSw@mail.gmail.com> In-Reply-To: <69e199f6-a3ac-db3b-c7a1-00001f750624@selasky.org> References: <CAP7bFfBhoHQXV%2BzpW3Sm%2BLcJh77U=KBoZzhJ6oxCxBABx3UPwQ@mail.gmail.com> <d7d15f35-f363-44df-bf05-c2253a5307d1@selasky.org> <CAP7bFfCRBnJh5k0fe8r9AnhzTh8FBO6_r=iu9D9qrwo-PTxD6A@mail.gmail.com> <4938264f-686a-af1a-cb28-f39585b1375a@selasky.org> <CAP7bFfBAVF1NuVhXLrDMkHGnMZA=tn7taN4cxQGkwO4ogKHkCg@mail.gmail.com> <c2b50b48-f842-2509-2075-dd9d3c6e3d79@selasky.org> <CAP7bFfAQw2uJ%2Bkn7xC=Yis6iFrnh7qn%2BdbbULqARDRO-p5=bag@mail.gmail.com> <69e199f6-a3ac-db3b-c7a1-00001f750624@selasky.org>
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Thanks a lot. What about uadriver? Maybe Motu support more formats but something wrong with driver. Would it be true? I've send question about it to Motu support. пн, 29 мар. 2021 г., 11:52 Hans Petter Selasky <hps@selasky.org>: > On 3/29/21 10:47 AM, Softwafe Engineer wrote: > > So I can't get true bitperfect right? I should convert signal before send > > to card output anyway. > > As long as your USB audio device reports it only supports 32-bit as > native format, then 16-bit bitperfect won't be possible. > > I think in Linux, ALSA automatically does audio format conversions. The > choice is just if your application has to provide a certain format or not. > > Try to look at "top" under Linux while playing something and find who's > doing the format conversion. > > --HPS >help
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