> Hi, > > attached are the config descriptors and the device dump of two uaudio > devices. Both exhibit distorted audio output. It sounds a little bit > like clipping / not feeding enough samples fast enough... > > I played around with dev.pcm.2.bitperfect=1, dev.pcm.2.play.vchans=0, > dev.pcm.2.play.vchanrate and hw.snd.latency=1...10. > > At some point vchanrate doesn't work anymore, it always stays at 4.0 > audio, even when trying to go back to 2.0. I have to usbconfig reset the > device. > > Sometimes (rarely) when playing around I get clear audio output, but > when I try to reproduce it (going back to default value for the last > sysctl setting and then going back again to the same setting again), the > audio is distorted again. > > To me it sounds like some kind of buffer is not big enough or the data > is not delivered fast enough to the uaudio device. But this is a > dual-socket system with: > CPU: Intel(R) Xeon(R) CPU E5620 @ 2.40GHz (2133.36-MHz > K8-class CPU) > FreeBSD/SMP: Multiprocessor System Detected: 16 CPUs > FreeBSD/SMP: 2 package(s) x 4 core(s) x 2 hardware threads > And while playing around with uaudio the system has a load of around 1, > so I would expect CPU/RAM is not an issue here.
Hi, What version of FreeBSD is this? Try to enable hw.usb.uaudio.debug=16 during playback. -- Alexander Garcia https://www.drillanddriver.com _______________________________________________ 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"
