Date: Tue, 28 May 2013 12:24:38 +0200 From: Hans Petter Selasky <hps@bitfrost.no> To: Jakub Lach <jakub_lach@mailplus.pl> Cc: freebsd-usb@freebsd.org Subject: Re: Any recent changes in usb audio in 9-STABLE? Message-ID: <51A485E6.4030901@bitfrost.no> In-Reply-To: <1369697546368-5815619.post@n5.nabble.com> References: <1369697546368-5815619.post@n5.nabble.com>
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On 05/28/13 01:32, Jakub Lach wrote: > Which would explain why I now have dev.pcm.0.play.vchanrate: 48000 > if bitperfect is set, while previously it was dev.pcm.0.play.vchanrate: > 96000 ? > > e.g. now if bitperfect is set- > > AUDIO: 44100 Hz, 2 ch, s16le, 0.0 kbit/0.00% (ratio: 0->176400) > Selected audio codec: [ffwavpack] afm: ffmpeg (FFmpeg WavPack audio) > AO: [oss] 48000Hz 2ch s16le (2 bytes per sample) > > previously- > > AUDIO: 44100 Hz, 2 ch, s16le, 0.0 kbit/0.00% (ratio: 0->176400) > Selected audio codec: [ffwavpack] afm: ffmpeg (FFmpeg WavPack audio) > AO: [oss] 96000Hz 2ch s16le (2 bytes per sample) > > No change with bitperfect=0 > > AUDIO: 44100 Hz, 2 ch, s16le, 0.0 kbit/0.00% (ratio: 0->176400) > Selected audio codec: [ffwavpack] afm: ffmpeg (FFmpeg WavPack audio) > AO: [oss] 44100Hz 2ch s16le (2 bytes per sample) > > Device is 96000Hz 2ch s24le capable. > > I thought bitperfect would disable any resampling so stream should > be the same as source or (as I thought when 96000 appeared) highest > supported by device? > Yes, Set "vchanmode" to "adaptive". 9-stable now supports more hardware rates. --HPS
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