Re: [LAU] Sniffing on MIDI to/from virtualbox

Atte wrote:
> On 08/08/2015 04:05 PM, Clemens Ladisch wrote:
>> Atte wrote:
>>> When I enable the device in virtualbox, it seems to disappear from the
>>> linux
>>
>> USB devices cannot be shared between host and VM.
>
> Ok. I was just hoping to "listen in" on the traffic. I imagined the bits
> must be running somewhere in my linux system, even though it show up in
> virtualbox.

Virtualbox knows about that data, but it has no interface for you to
access it.

>> Please show the output of "lsusb -v" for this device.
>
> AudioControl Interface Descriptor:
> baInterfaceNr( 0) 1
> Interface Descriptor:
> bInterfaceClass 1 Audio
> bInterfaceSubClass 3 MIDI Streaming
> bInterfaceProtocol 0

This is a plain MIDI device, and there is no other obvious mechanism to
access the device, so it is likely that the software uses MIDI for its
vendor-specific stuff.

Anyway, Virtualbox uses the Linux API to access the real USB controller,
so it should be possible to use usbmon:
https://www.kernel.org/doc/Documentation/usb/usbmon.txt

> bmAttributes 0xa0
> (Bus Powered)
> Remote Wakeup
> MaxPower 100mA
> Interface Descriptor:
> bInterfaceNumber 0

I guess this is from some other device?

Regards,
Clemens
_______________________________________________
Linux-audio-user mailing list
Linux-audio-user@email-addr-hidden
http://lists.linuxaudio.org/listinfo/linux-audio-user
Received on Mon Aug 10 00:15:01 2015