As it happens, I'd missed something very obvious. In pavucontrol (the one place I'd failed to look), the device showed up as being auto-configured, which explained why I couldn't open it with ALSA cli tools, or bridge it into JACK.
As soon as I disabled the device in pavucontrol, I was able to expose all 4 of its inputs and all 4 outputs in JACK via the zita bridge tools. Cheers David On Sun, 8 Oct 2023 at 19:05, David McNab <davidmcna...@gmail.com> wrote: > Hi all, > > I'm hoping for some ideas to get a maya44-based audio device working in > ALSA on a Ubuntu 20.04LTS x86-64 audio workstation. > > The device shows up in 'arecord -l' and 'aplay -l'. But when I try to > record from it with arecord, I get: > > > *arecord -D hw:5 -t wav -c 2 -f S16_LE -r 44100 /tmp/foo.wavarecord: > main:831: audio open error: Device or resource busy* > > The device shows up in alsamixer, with 2 x stereo line outputs, but only 1 > x stereo line input. > > My kernel does have the 'maya44' code compiled in. > > Further system and device details below. > > Can anyone please help me get this working? > > Cheers > Daid > > > *Device details:* > > *Type*: USB audio interface, 4 analog in, 4 analog out > *Brand:* Vestax > *Model*: VAI-40 > *lsusb output:* ID 0a92:0091 EGO SYStems, Inc. Maya 44 > *uname output:* Linux rebirth 6.2.0-32-generic #32~22.04.1-Ubuntu SMP > PREEMPT_DYNAMIC Fri Aug 18 10:40:13 UTC 2 x86_64 x86_64 x86_64 GNU/Linux > *syslog entries:* > Oct 8 07:21:52 rebirth kernel: [1529905.178342] usb 1-8: new full-speed > USB device number 65 using xhci_hcd > Oct 8 07:21:53 rebirth kernel: [1529905.345032] usb 1-8: New USB device > found, idVendor=0a92, idProduct=0091, bcdDevice= 1.00 > Oct 8 07:21:53 rebirth kernel: [1529905.345046] usb 1-8: New USB device > strings: Mfr=1, Product=2, SerialNumber=0 > Oct 8 07:21:53 rebirth kernel: [1529905.345048] usb 1-8: Product: MAYA44 > USB > Oct 8 07:21:53 rebirth kernel: [1529905.345050] usb 1-8: Manufacturer: > AUDIOTRAK > Oct 8 07:21:53 rebirth iWatch[2886]: * Send email to root@localhost > Oct 8 07:21:54 rebirth iWatch[2886]: * Send email to root@localhost > Oct 8 07:21:54 rebirth kernel: [1529906.695073] hid-generic > 0003:0A92:0091.00A1: hiddev1,hidraw5: USB HID v1.00 Device [AUDIOTRAK > MAYA44 USB] on usb-0000:00:14.0-8/input3 > Oct 8 07:21:54 rebirth mtp-probe: checking bus 1, device 65: > "/sys/devices/pci0000:00/0000:00:14.0/usb1/1-8" > Oct 8 07:21:54 rebirth mtp-probe: bus: 1, device: 65 was not an MTP device > Oct 8 07:21:54 rebirth systemd-udevd[2368803]: controlC5: Process > '/usr/sbin/alsactl -E HOME=/run/alsa -E XDG_RUNTIME_DIR=/run/alsa/runtime > restore 5' failed with exit code 99. > Oct 8 07:21:54 rebirth mtp-probe: checking bus 1, device 65: > "/sys/devices/pci0000:00/0000:00:14.0/usb1/1-8" > Oct 8 07:21:54 rebirth mtp-probe: bus: 1, device: 65 was not an MTP device > > > > >
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