[alsa-devel] New sound device question

Hello All

I'm a newbie in this group and the sound systems.

I try to developpe a usb sound driver for a Alesis Multix 8 USB2.0

http://www.alesis.com/multimix8usb20

The output interface is allready fonctional, but the Input not :-( Because there is 2 end point for it. The first one is on Isochronous mode and the other is on Bulk mode

I don't know how to declare the second endpoint in the quirks_table.

Where can I get a good documentation or help about the alsa USB sound structure.

The only informations I have about the devices, are dump from windows

thanks