No, with frame/period of 2 it also *seems* to work. I tried jack_delay, it returns me this whatever frames/period I try. What that means? capture latency = 1024 playback_latency = 1024 Signal below threshold... Signal below threshold... Signal below threshold... Signal below threshold... Signal below threshold... Signal below threshold... 2011/4/2, Robin Gareus <robin@xxxxxxxxxx>: > On 04/03/2011 12:52 AM, Bernardo Barros wrote: >> I would be very embarrassed if I'm fooling myself, but from what I >> read the information provided by qjackctl, is this really the latency >> of the audio system as low as 0.08ms with frames/period of 2! :S > > must be a typo: 2*16/ 44100Hz = 0.725ms = ~0.8ms > > Measure it with 'jack_delay' [1]. The number given in qjackctl's setup > dialog is the nominal latency; and the time between two jack cycles. > > Usually there's additional latency due to [PCI|USB] bus overhead, > sound-card & ALSA buffering, DAC/ADCs, etc. - around 1 ms round-trip for > PCI devices. > http://wiki.linuxaudio.org/wiki/jack_latency_tests > > have fun, > robin > > > [1] http://kokkinizita.linuxaudio.org/linuxaudio/index.html > _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
