This is still missing in 1.0.20.
This device doesn't seem to be supported yet. Does Roland make the specifications available, etc? The device is not compatible with USB Audio, but rather uses Vendor Specific Class.
It appears to have most of the audio class descriptors, so it should be possible to tell the driver to just use it.
Please try to add the following entry somewhere in sound/usb/usbquirks.h and to recompile the driver:
{ /* Edirol M-16DX */ USB_DEVICE(0x0582, 0x00c4), .driver_info = (unsigned long) & (const struct snd_usb_audio_quirk) { .ifnum = QUIRK_ANY_INTERFACE, .type = QUIRK_COMPOSITE, .data = (const struct snd_usb_audio_quirk[]) { { .ifnum = 0, .type = QUIRK_AUDIO_STANDARD_INTERFACE }, { .ifnum = 1, .type = QUIRK_AUDIO_STANDARD_INTERFACE }, { .ifnum = 2, .type = QUIRK_MIDI_FIXED_ENDPOINT, .data = & (const struct snd_usb_midi_endpoint_info) { .out_cables = 0x0001, .in_cables = 0x0001 } }, { .ifnum = -1 } } } },
Could you add this quirk to the alsa-driver distribution as well? I'm getting tired of patching it myself for every new release :)
I didn't get any response about the patch, so I couldn't apply it...
Perhaps you missed the entire thread that was going on about this in 2008? The one where I reported my results and other people also participated in the analysis.
Seriously, without the response from testers, the development can never go on. It'd be helpful if you give back the result precisely and soon at the next time...
Are you still expecting some feedback? You didn't suggest so in your last message, so I didn't see the need to answer.