[wdmaudiodev] MIDI Vista RC2

  • From: Guenter Hildebrandt <g.hildebrandt@xxxxxxxxxxx>
  • To: wdmaudiodev@xxxxxxxxxxxxx
  • Date: Fri, 20 Oct 2006 08:17:34 +0200

Hi all,

the MIDI source behavior in the AVS model has changed with Vista, tested with RC2.

In XP the driver can assume that there is always a framing buffer to indicate received MIDI data to the ks.sys driver. In Vista there is only one buffer at el. It is independent from the settings in KSALLOCATOR_FRAMING_EX one buffer.

Furthermore some times there is no buffer for a time interval larger than 50 ms on a double core PC without any load condition. This seems very strange.

This causes the requirement to have a buffer in the driver to store the Midi data if the KS interface is not able to receive it.

I think this behavior is more a bug than a feature.



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  • » [wdmaudiodev] MIDI Vista RC2