Both are already mentioned but I'd like to confirm that these do work on RPi (provided the USB speed is lowered as described in this thread): iMic and Behringer UCA202.
Katja On Sun, Jan 27, 2013 at 5:51 PM, Miller Puckette <m...@ucsd.edu> wrote: > I heard suggestions on the Pi sites (I forget exactly where) that the USB > 2.0 implementation isn't compatible with a large variety of USB 2.0 devices > (including for instance the Griffin iMic). So I don't think the issue is > the load that USB 2.0 puts on the Pi, it's simply bugs. But I gather nobody > is in a hurry to get them fixed - the attitude in Cambridge is that it's the > devices' fault, not the Pi's. > > I have beem suspecting that my keyboard is also incompatible with the Pi at > USB 1.1 speed. I haven't tried other keyboards yet since I'm usually happy > to ssh in without any other USB devices (besides audio and ethernet) > talking to the Pi. But this is not always true so soon enough I'll have to > try other keyboards so I can get the thing working as a standalone computer. > > cheers > Miller > > On Sun, Jan 27, 2013 at 04:50:16PM +0100, katja wrote: >> Thanks Pierre and Cyrille. >> >> It turned out that various keyboards and mouse just kill USB (when at >> 1.1) on the Pi. 'Keysonic Wireless Trackball Keyboard' happens to work >> well. The lower USB speed brings substantial improvement of the audio >> indeed. Now a real realtime kernel, that would probably improve things >> further. >> >> Katja >> >> >> >> On Sun, Jan 27, 2013 at 2:33 PM, Cyrille Henry <c...@chnry.net> wrote: >> > i put it in front of everything : >> > >> > dwc_otg.speed=1 dwc_otg.lpm_enable=0 console=ttyAMA0,115200 >> > kgdboc=ttyAMA0,115200 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 >> > elevator=deadline rootwait >> > >> > cheers >> > c >> > >> > Le 27/01/2013 11:42, katja a écrit : >> > >> >> Hello, >> >> >> >> Some people seem to have result with setting lower USB speed on the >> >> Pi, but when I try this, the Pi doesn't even respond to keyboard >> >> anymore. Checking /boot/cmdline.txt with another computer, I'm sure it >> >> is not due to a typo. But the order of settings may be important? >> >> Could anyone copy the full text of /boot/cmdline.txt for me, if you >> >> have keyboard working with lowered USB speed? (I'm not talking about >> >> good audio yet). >> >> >> >> Thanks, >> >> Katja >> >> >> >> >> >> On Sat, Jan 26, 2013 at 8:54 PM, Thomas Grill <g...@grrrr.org> wrote: >> >>> >> >>> Message to self: it seems that one has to wait for updated RPi USB >> >>> firmware/drivers to get USB 2.0 audio going. >> >>> Obviously the "isochronous transfer mode" as used by audio interfaces is >> >>> currently broken. >> >>> gr~~~ >> >>> >> >>> >> >>> 2013/1/26 Thomas Grill <g...@grrrr.org> >> >>>> >> >>>> >> >>>> Hi all, >> >>>> for my USB audio class 2.0 device "Native Instruments Komplete Audio 6" >> >>>> i >> >>>> can't report such good news. >> >>>> There is constant irregular crackling, not only with Pd but also with >> >>>> aplay etc. It seems related to USB bandwidth, since turning on and off >> >>>> the >> >>>> inputs in Pd changes crackling frequency. The dwc_otg.speed setting is >> >>>> not >> >>>> usable for me, since the device is dependent on USB 2.0 operation. >> >>>> Any experiences with USB 2.0 audio devices under ALSA/rpi? >> >>>> thanks, >> >>>> gr~~~ >> >>>> >> >>>> >> >>>> 2013/1/26 Cyrille Henry <c...@chnry.net> >> >>>>> >> >>>>> >> >>>>> hello, >> >>>>> >> >>>>> I just install raspbian release and update it. then install pd 0.44.1 >> >>>>> (without any specific optimisation flag) >> >>>>> >> >>>>> I made the standard optimisation : >> >>>>> * - rtprio 99 >> >>>>> * - memlock 1000000000 >> >>>>> in /etc/security/limits.conf >> >>>>> >> >>>>> and >> >>>>> dwc_otg.speed=1 >> >>>>> in /boot/cmdline.txt >> >>>>> as suggested by miller >> >>>>> >> >>>>> I use a uca222 beringher (that cost about 20 or 25€) sound card. >> >>>>> trying the test audio and midi, there is no click with 10ms audio >> >>>>> buffer >> >>>>> (with adc~ enable). >> >>>>> >> >>>>> this is with usb keyboard / mouse combo plugged and graphical interface >> >>>>> (for the system and for pd). >> >>>>> >> >>>>> without X, audiobuf can be as low as 5ms >> >>>>> >> >>>>> having a usb keyboard did not change anything for me. >> >>>>> >> >>>>> i'm very happy >> >>>>> >> >>>>> cheers >> >>>>> c >> >>>>> >> >>>>> _______________________________________________ >> >>>>> Pd-list@iem.at mailing list >> >>>>> UNSUBSCRIBE and account-management -> >> >>>>> http://lists.puredata.info/listinfo/pd-list >> >>>> >> >>>> >> >>>> >> >>>> >> >>>> >> >>>> -- >> >>>> Thomas Grill >> >>>> http://grrrr.org >> >>> >> >>> >> >>> >> >>> >> >>> >> >>> -- >> >>> Thomas Grill >> >>> http://grrrr.org >> >>> >> >>> _______________________________________________ >> >>> Pd-list@iem.at mailing list >> >>> UNSUBSCRIBE and account-management -> >> >>> http://lists.puredata.info/listinfo/pd-list >> >>> >> >> >> >> _______________________________________________ >> >> Pd-list@iem.at mailing list >> >> UNSUBSCRIBE and account-management -> >> >> http://lists.puredata.info/listinfo/pd-list >> >> >> > >> >> _______________________________________________ >> Pd-list@iem.at mailing list >> UNSUBSCRIBE and account-management -> >> http://lists.puredata.info/listinfo/pd-list _______________________________________________ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list