On Tue, 10 Oct 2017 20:14:37 +0200 Alexander Leidinger <alexan...@leidinger.net> wrote:
> Quoting Hans Petter Selasky <h...@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 alexan...@leidinger.net: PGP 0x8F31830F9F2772BF > http://www.FreeBSD.org netch...@freebsd.org : PGP 0x8F31830F9F2772BF -- Gary Jennejohn _______________________________________________ freebsd-usb@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-usb To unsubscribe, send any mail to "freebsd-usb-unsubscr...@freebsd.org"
