Sunday, November 18, 2012

Drum Trigger to MIDI to PC Audio Out

Here are some measurements of the delays in my edrum setup:

The overall delay from the piezo trigger input to the audio out of the pc sound card.  Showing a delay of 10.8ms in this sample.  (blue is the piezo trigger input and yellow is the pc audio out) 



The delay from the piezo trigger input (blue) to the edrum serial comms MIDI transmission (yellow)



The time to send the MIDI command over serial at 115200baud.  (note it is showing there are some non-optimal gaps between the transmitted bytes so could be slightly faster, but not much.



I am actually surprised at how long the computer takes to process the MIDI and produce an output.  Will need to investigate further.