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#149867
cauldron
Participant

Hi Tom,

I apologize. I have redoed the measurements and I confirm what you said except for 176.4kHz and 192kHz which are 10512 samples.

I used a buffer of 8192 samples. The round-trip time is measured (with and without the Physion plugin) using the jack_delay utility ( https://kokkinizita.linuxaudio.org/linuxaudio/downloads/jack_delay-0.4.0.tar.bz2 ). Jack Audio includes the jack_iodelay utility which is equivalent.

Latency is always constant (just over 50ms).

192kHz  ***10512***

      26896.000 frames  140.083 ms

      16384.000 frames   85.333 ms

176.4kHz ***10512***

      26896.000 frames  152.472 ms

      16384.000 frames   92.880 ms

96kHz ***5392***

      21776.000 frames  226.833 ms

      16384.000 frames  170.667 ms

88.2kHz ***5392***

      21776.000 frames  246.893 ms

      16384.000 frames  185.760 ms

48kHz  ***2832***

      19216.000 frames  400.333 ms

      16384.000 frames  341.333 ms

44.1kHz ***2832***

      19216.000 frames  435.737 ms

      16384.000 frames  371.519 ms

 

Elia