Hi
I'm using an AudioFire 8a that has 16 channels over the firewire bus and the snd-fireworks alsa firewire driver. In Jack, when I set Frames/Period to anything higher than 64, alsa fails with an error saying
Mon Apr 7 22:15:35 2025: ERROR: ALSA: cannot set hardware parameters for capture Mon Apr 7 22:15:35 2025: ERROR: ALSA: cannot configure capture channel
I noticed that the output of "aplay -D hw:1,0 --dump-hw-params /dev/zero" indicated the following alsa settings: Playing raw data '/dev/zero' : Unsigned 8 bit, Rate 8000 Hz, Mono HW Params of device "hw:1,0": -------------------- ACCESS: MMAP_INTERLEAVED RW_INTERLEAVED FORMAT: S32_LE SUBFORMAT: STD SAMPLE_BITS: 32 FRAME_BITS: [384 512] CHANNELS: [12 16] RATE: [32000 96000] PERIOD_TIME: [250 32000] PERIOD_SIZE: [16 2720] PERIOD_BYTES: [768 131072] PERIODS: [2 341] BUFFER_TIME: (333 170500] BUFFER_SIZE: [32 5456] BUFFER_BYTES: [1536 262144] TICK_TIME: ALL -------------------- aplay: set_params:1371: Sample format non available Available formats: - S32_LE
I was concerned that the BUFFER_SIZE was too small to support 16 channels at a 128 Frames/Period size. But when I modded the driver to increase this figure, it did not fix the issue.
Anyone have any insight on this issue? Running Ubuntu 24.04 with kernel 6.8.0-57-lowlatency. Everything seems to work fine when I set 64 Frames/Period (except the occasional annoying stuttering that one can expect in that scenario; with a buffer that is too small to support the system load).
Thanks
Jay