Date: Wed, 11 Oct 2017 06:07:34 +0200 From: Gary Jennejohn <gljennjohn@gmail.com> To: Alexander Leidinger <Alexander@leidinger.net> Cc: Hans Petter Selasky <hps@selasky.org>, freebsd-usb@freebsd.org Subject: Re: uaudio - distorted output Message-ID: <20171011060734.6db69d1e@ernst.home> In-Reply-To: <20171010201437.Horde.akunLS7Olg1TP_2Xo07fLI3@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> <de20c0f8-76b1-7ab5-c2b3-7ca5c2f9d087@selasky.org> <20171010201437.Horde.akunLS7Olg1TP_2Xo07fLI3@webmail.leidinger.net>
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On Tue, 10 Oct 2017 20:14:37 +0200 Alexander Leidinger <Alexander@leidinger.net> wrote: > Quoting Hans Petter Selasky <hps@selasky.org> (from Mon, 9 Oct 2017 22:38:32 +0200): > > > 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! > > I have now tried every single USB connector, external and internal. None of them attaches to the EHCI bus. :( The only connector which Iwas not able to test is labeled "USB SSD" and has a smaller pin-gridthan those other internal usb-PIN-connectors with cables to the frontof the case. > > I think I will now buy a PCIe USB3.0 card. Anything I should avoid? Anything you recommend? I found this: > www.amazon.de/CSL-Express-Controller-SATA-Stromanschluss-Schnittstellenkart > e/dp/B00OBACW0G > which seems to have some VLI chip on it. I haven't found anything usable in terms of vendor/product ID or such. > 4 ports may be enough, for an external USB backup HD, the soundcard, and a video device, but for ~10 EUR difference... > I've been using the CSL B00F9XGPTI XHCI 4-port card which works. I bought it on amazon.de, but I don't know whether it's still available. > >> 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 > > I activated bitperfect as a test because I got the distortion and was hoping to either gain some lower-latency or at least get rid of somelayers of code to rule out issues there. > > > 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. > > In the end I want 5.1 output, so if the bus speed doesn't give me this: no need to waste our time with the slow ports. > > Bye, > Alexander. > > -- > http://www.Leidinger.net Alexander@Leidinger.net: PGP 0x8F31830F9F2772BF > http://www.FreeBSD.org netchild@FreeBSD.org : PGP 0x8F31830F9F2772BF -- Gary Jennejohn
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