[LAU] Edirol UA-20 in advanced mode

Any news about this????

[linux-audio-user] Edirol UA-20 not seen by alsa in ADVANCED mode -
ADDITIONAL INFO

Clemens Ladisch clemens at ladisch.de
Mon Nov 21 11:49:03 EST 2005

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________________________________

Cesare Marilungo wrote:

> This is my lsusb -v output:
>
> Bus 001 Device 002: ID 0582:0025 Roland Corp.
> ...
> bcdDevice 1.01
> ...
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 1
> bAlternateSetting 1
> bNumEndpoints 1
> bInterfaceClass 255 Vendor Specific Class
> bInterfaceSubClass 2
> bInterfaceProtocol 0
> iInterface 0
> Endpoint Descriptor:
> bLength 9
> bDescriptorType 5
> bEndpointAddress 0x01 EP 1 OUT
> bmAttributes 9
> Transfer Type Isochronous
> Synch Type Adaptive
> Usage Type Data
> wMaxPacketSize 0x0120 bytes 288 once
> bInterval 1
> bRefresh 0
> bSynchAddress 0

It seems some moron at Roland made a new revision of this device and left out
the class-specific descriptors that would have told the driver what sample
format to use.

I've changed the driver to use a hard-coded sample format for the UA-20.
This should be on the public CVS servers in a hour or so.

HTH
Clemens

Thanks
Nicola Lunghi
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Received on Thu Jan 29 20:15:04 2009