Hi, Polashek, Matthew wrote: > Anyone here know: > > 1 - How I can measure the latency of a USB-audio device connected to PD via > ALSA? There is a patch in "doc/7.stuff/tools/" called latency.pd, which you can use to measure roundtrip latencies with Pd. It comes with instructions on use. Pd is *not* callback driven and uses various buffers, so you will always get double or even triple latency in Pd compared to something like Ardour. > 2 - What the minimum latency of a USB-audio device is with Linux? In my experiences with about 20 USB devices "jackstart -p 128" is the lowest I ever could achieve more or less stable. How low a latency in msecs that is depends on the samplerate. Ciao -- Frank Barknecht
