[sdiy] Raspberry Pi 2 B Synthesizer Project Progress

ASSI Stromeko at nexgo.de
Tue Mar 15 20:19:55 CET 2016


On Tuesday 15 March 2016, 11:58:52, Scott Gravenhorst wrote:
> More progress - the current version works with latency (MIDI note-on
> receipt to start of sound) of 2 milliseconds.
> 
> Now that I finally understand how the buffer usage algorithm works for
> ALSA, I started reducing the buffer size until it stopped working.  4
> periods caused error messages from ALSA where 6 periods ran smoothly.
> 
> 6 periods or 48 frames at 44.1 ksps is about 1.09 milliseconds.

You can likely wring out some more performance when you set your processes 
up with the correct real-time scheduling strategy and priority and maybe CPU 
affinity.


Regards,
Achim.
-- 
+<[Q+ Matrix-12 WAVE#46+305 Neuron microQkb Andromeda XTk Blofeld]>+

SD adaptation for Waldorf Blofeld V1.15B11:
http://Synth.Stromeko.net/Downloads.html#WaldorfSDada




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