Hello, My audio driver is a stream class miniport. I'm trying to add a MIDI IN (device to host) pin. When I open this pin and request MIDI short messages my driver receives SRBs with buffers of 20 bytes. Does anyone know the how these 20 byte buffers are structured? FYI: I have also create a MIDI OUT pin. The buffers the driver receives when sending a MIDI short messages to this pin are of the form KSMUSICFORMAT. Thanks, John ****************** WDMAUDIODEV addresses: Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx Subscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=subscribe Unsubscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=unsubscribe Moderator: mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx URL to WDMAUDIODEV page: http://www.wdmaudiodev.de/