Maybe the word latency did confuse some people here. Latency is sometimes used for the OS scheduling time, or for a network packet delay, or for the audio buffer-size.
In my case I wanted to name the delay from the analogue input signal to the analogue output signal. > > > Nonsense! What about tubas ? > > > I admit a guitar would feel pretty awful w/ 10 ms latency, > > > > And yet electric guitarists do it all the time. Ever stood 10 feet away > > from your amp? It's no big deal, you get used to it. > > Thats true, but doesn't match my experience of trying to play with 512 > sample buffers... although that probably doesn't equate to 512 samples of > latency, its probably more. It is more indeed! An ALSA audio interface normally uses two double-buffers. One for the input and one for the output. 512 samples is the size of one half of the double buffer. Therefore the minimum delay in your test was 2*512/48kHz = 21.3ms. Usually the ADC/DAC adds another 1-2ms. Besides that you probably used loudspeakers for your test and therefore the acoustic delay needs to be added. > I'l have to try it with a hardware delay line. Yes! Great idea!
