On 5/15/21 9:28 PM, Chris Caudle wrote: > No better results trying to use the Ardour ALSA backend, but that only > allows choosing 32 or 64 for period size, Try ardour/git that allows for non power of two buffers. or more specifically the ALSA backend explicitly offers millisecond buffer-sizes for devices that require it e.g. recent HDA Intel via SOF (Sound Open Firmware). Also as of yesterday's git, today's nightly.ardour.org build ARDOUR_ALSA_DEBUG=1024 Ardour6 will first try to use interleaved access and then fall back to non-interleaved instead of the other way around. -- robin PS. With a HDA Intel card here all I/O is MMAP interleaved. The device returns an error when trying to configure it with SND_PCM_ACCESS_MMAP_NONINTERLEAVED.
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