Re: Roland Mobile Studio Canvas SD-50

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Daniel Mack wrote:
> On 08.06.2013 10:52, immanuel litzroth wrote:
>> the card is recognized but it doesn't show up in aplaymidi -l
>
> Maybe it needs another quirk there, even though the descriptors contain
> a MIDI header.

I haven't seen the lsusb output, but my crystal ball tells me that that
descriptor has a descriptor subtype of 0xf1, which is not a standard
MIDI header.

I'm writing a patch to allow the driver to detect these Roland
descriptors automatically, but if you want to get this device to work
quickly, add a FIXED_ENDPOINT quirk with the correct bitmasks (in the
f1/02 descriptor, the last two bytes specify the number of input and
output ports).


Regards,
Clemens

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