Hi all,

I'm currently investigating audio latency compensation in Pd. The goal is for recorded audio to align well with generated sounds timing-wise. I'm wondering now what methods people already have employed in order to achieve that goal.

So far, I was able to find the formulas to calculate the correct latency when using ALSA and JACK audio back-ends as long as the paramaters 'Delay(msec)' and 'Block size' for ALSA, respectively 'Frames/period' and 'Periods/buffer' for JACK are known. Currently, this approach works, but requires me to tell the latency compensation calculator what driver I'm using and what the current settings are. Also, it yet only works on Linux, but not with any other drivers like CoreAudio, ASIO, etc.

How can I achieve correct latency compensation reliably on any platform? Is there some more generic way?

I'm also looking at IEM's mediasettings library, hoping it would deliver the required information to calculate latency. The README.txt says 'get/set Audio and MIDI settings within Pd', but I wasn't able to find a way to _get_ current settings other than 'advance 100', which probably refers to 'Delay(msec)' set to '100'. But still, if it would give all Pd audio settings, how would it know about current jackd settings?

Roman