Date: Mon, 9 Oct 2017 22:38:32 +0200 From: Hans Petter Selasky <hps@selasky.org> To: Alexander Leidinger <Alexander@leidinger.net> Cc: freebsd-usb@freebsd.org Subject: Re: uaudio - distorted output Message-ID: <de20c0f8-76b1-7ab5-c2b3-7ca5c2f9d087@selasky.org> In-Reply-To: <20171009214747.Horde.6Me9X2nep_RP1M2tHVDmKxq@webmail.leidinger.net> References: <20171008125631.Horde.ZsqSFDr1-uiT1YrkgH5i0tF@webmail.leidinger.net> <633f23dd-3b61-fe17-b894-6b1221a5dfd4@selasky.org> <20171008142514.Horde.hRkzth4Ur4wvjgUIlWuc70c@webmail.leidinger.net> <21e04dc4-045d-fb30-337a-7f7bd4fe8b50@selasky.org> <20171008230836.Horde.gG7VyE_62V3bMJX_VtbUrAP@webmail.leidinger.net> <85f5fd9a-2a58-9f5d-6796-716aae617274@selasky.org> <20171009210535.Horde.-orp9MzE2_7XgkKpP7K9L4J@webmail.leidinger.net> <9399c2dc-b514-fd0f-3401-57d43daad96b@selasky.org> <20171009214747.Horde.6Me9X2nep_RP1M2tHVDmKxq@webmail.leidinger.net>
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On 10/09/17 21:47, Alexander Leidinger wrote: >> If you are using multi channel audio equipment with 24-bits, try to >> avoid FULL-speed ones! > > Well... first I want to get the 2 channel 16bit case working... then I > will have a look at extending this to 5.1 (most probably 16bit, that's > enough to watch action movies). Hi, Some more ideas: 2 channel 16 bit will only work if you turn off bitperfect. The lowest number of channels the device exports is 4 for playback. That means the kernel will re-format 2 channels to 4 channels always and that is done by the PCM feeder. You'll need to check that there is a filter which handle that. You might want to install virtual_oss from ports to handle this device properly. --HPS
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