## MMPM/2 Device Driver Reference

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### Priorities

When the VSD receives DDCMD_READ and DDCMD_WRITE messages, it will occur on a time-critical thread from the audio stream handler. If other threads are running, the DDCMD thread will always run first because of priority.

Other commands such as VSD_SET and VSD_QUERY may come simultaneously at a normal priority. (You may be executing one command and then be jumped to a thread of higher priority.)