Hi, On Thu, 2007-09-20 at 17:28 -0400, DJ A. J. Slye wrote: > ok, the BCD2000 is USB compliant and defined at the hardware level. Linux > detects the device as bcd2000 but doesn't have drivers for the components > past the USB i.e. Sound and Midi, However, it's doesn't appear to be the > components that are not compliant it seems to be the firmware of the device > that isn't, as you can see from the lsusb output I posted earlier... USB provides for a "Device Class" which allows for developers to develop drivers based on the specifications at http://www.usb.org/developers/devclass_docs - this is what is meant by "USB Class Compliant", so any device that is, say, "USB Audio Class Compliant" will work with drivers that understand that specification - e.g. the ALSA snd-usb-audio driver. However this device has a class of 255 which is reserved for proprietary interfaces - the manufacturer can send and receive data of their own devising within the USB protocol, it can be thought of as an I/O device for a specific piece of software that uses the lower level USB protocols for convenience. It is likely that the only specification for the higher level protocol that exists was passed between the manufacturers hardware designers and their driver developers. > I also > know that I am not the first person to ask about this, if we could get a > working OSS or ALSA driver then we would also have a place to start for > other OS support. Behringers driver suport is slim to none and any work > towards an opensource driver for this device would help to eleviate many who > have this device.... Almost certainly the prerequisites before anyone could even think of developing a driver for this device would be that there is a specification of the interface that is sufficiently detailed to write an implementation from (like those linked above) and an example of the hardware. See http://www.alsa-project.org/main/index.php/ALSA_Soundcard_Vendor_Information Then of course you need a sufficiently motivated developer as Bill explained. P.S. It appears that someone has done some work on a MAC OS/X driver - http://www.evinyatar.be/sphpblog/index.php?category=4 but hasn't released the source, this may or may not be useful to anyone developing an ALSA driver. /J\ ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
