soumello
23-08-25, 01:58
Hi, I’m getting about 50 ms of latency when running SamplerBox with Pisound on Raspberry Pi.
I tried changing BLOCKSIZE in configuration.txt:
BLOCKSIZE = Low → still forces high buffer size (period_size: 416, buffer_size: 2080).
BLOCKSIZE = 104 → SamplerBox shows blocksize=104, but ALSA reports period_size: 626, buffer_size: 1878.
BLOCKSIZE = 204 → ALSA falls back to period_size: 624, buffer_size: 1872.
I also tried modifying audio.py to add latency=0.02 in the sounddevice.Stream. This reduced the buffer size, but caused strong clicks and pops.
It seems ALSA always overrides the requested settings with much larger period/buffer sizes.
Question:
What’s the recommended way to configure Pisound + SamplerBox for reliable low latency (e.g., period_size=64 / buffer_size=128 at 48kHz) without glitches? Should this be forced via .asoundrc or directly in SamplerBox’s audio backend?
I tried changing BLOCKSIZE in configuration.txt:
BLOCKSIZE = Low → still forces high buffer size (period_size: 416, buffer_size: 2080).
BLOCKSIZE = 104 → SamplerBox shows blocksize=104, but ALSA reports period_size: 626, buffer_size: 1878.
BLOCKSIZE = 204 → ALSA falls back to period_size: 624, buffer_size: 1872.
I also tried modifying audio.py to add latency=0.02 in the sounddevice.Stream. This reduced the buffer size, but caused strong clicks and pops.
It seems ALSA always overrides the requested settings with much larger period/buffer sizes.
Question:
What’s the recommended way to configure Pisound + SamplerBox for reliable low latency (e.g., period_size=64 / buffer_size=128 at 48kHz) without glitches? Should this be forced via .asoundrc or directly in SamplerBox’s audio backend?