i'd like to report that after some more fixes i am able to achieve a measured click-free analog latency of 10 ms with the RME Multiface. In former times i haven't been able to go below 25 ms.
i'm curious, which buffer size you where using ...
i used 128 frames of hardware buffer.
i was thinking ... this is too much ...
128 * 2 (input and output) are 256 samples ... that is 5.8 ms at a sampling rate of 44100 ... what have you specified as latency inside pd?
still thinking about a way to run the scheduler from the dsp callback ... tim