Dear ALSA Developers

I have a problem getting my obscure USB DAC (Starting Point Systems DAC3) to work in Linux. I believe the problem may be similar to this one, but am not sure:

https://groups.google.com/forum/#!topic/linux.debian.kernel/HwwkRkbL5aY

If I try to use aplay to play a wav I receive the following error:

aplay -D default test.wav Playing WAVE 'test.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo aplay: pcm_write:1939: write error: No such device

syslog shows the following:

Jul 9 15:38:31 atlas kernel: [ 4805.148059] usb 7-2: USB disconnect, device number 19 Jul 9 15:38:32 atlas kernel: [ 4805.532022] usb 7-2: new full-speed USB device number 20 using uhci_hcd Jul 9 15:38:32 atlas kernel: [ 4805.725024] usb 7-2: New USB device found, idVendor=2504, idProduct=0201 Jul 9 15:38:32 atlas kernel: [ 4805.725029] usb 7-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 Jul 9 15:38:32 atlas kernel: [ 4805.725032] usb 7-2: Product: TDA 1543 DAC 3 v1.4 Jul 9 15:38:32 atlas kernel: [ 4805.725034] usb 7-2: Manufacturer: STARTING POINT SYSTEMS Jul 9 15:38:32 atlas kernel: [ 4805.725035] usb 7-2: SerialNumber: Jul 9 15:38:32 atlas kernel: [ 4805.745018] usb 7-2: Warning! Unlikely big volume range (=65535), cval->res is probably wrong. Jul 9 15:38:32 atlas kernel: [ 4805.745023] usb 7-2: [2] FU [PCM Playback Volume] ch = 1, val = -32768/32767/1 Jul 9 15:38:32 atlas mtp-probe: checking bus 7, device 20: "/sys/devices/pci0000:00/0000:00:1d.1/usb7/7-2" Jul 9 15:38:32 atlas mtp-probe: bus: 7, device: 20 was not an MTP device

I have another USB DAC that works fine, in syslog the working DAC has the following lines which are not present with the non-working DAC:

Jul 11 19:56:35 atlas kernel: [83940.049124] input: Lakewest Audio Audiolab M-DAC as /devices/pci0000:00/0000:00:1d.1/usb7/7-2/7-2:1.0/0003:0451:ADAC.0002/input/input12 Jul 11 19:56:35 atlas kernel: [83940.104367] hid-generic 0003:0451:ADAC.0002:input,hiddev0,hidraw1: USB HID v1.11 Device [Lakewest Audio Audiolab M-DAC] on usb-0000:00:1d.1-2/input0

With the non-working DAC I get these lines instead:

Jul 11 19:56:25 atlas kernel: [83930.079063] usb 7-2: Warning! Unlikely big volume range (=65535), cval->res is probably wrong. Jul 11 19:56:25 atlas kernel: [83930.079067] usb 7-2: [2] FU [PCM Playback Volume] ch = 1, val = -32768/32767/1

I am using Linux Mint 17.3 64bit, kernel 3.19.0-32. I have also tried kernel 4.4.0-28 but to no avail. The ALSA version is 1.0.27.2 .

Any help or suggestions would be greatly appreciated. Thanks very much.

Best regards

John Westwood