I don't see where this is happening in the code. I know that this does 
not happen in some PortMidi applications I've built. I wonder if there 
could be something in the device driver or the receiver could be turning 
off notes when MIDI active sensing messages stop?

If you can set some breakpoints on Pm_WriteShort and Pm_Write, you could 
look at the stack to find who is calling it (if anyone).

-Roger

On 4/3/14 5:26 PM, Stephane Poirier wrote:
> Hi all,
>
> Portmidi is sending automatically "All sound off" on the 16 channel when
> closing device. That is after I have sent some midi control changes to
> that device.
>
> Is there a way to disable that default behavior?
>
> Steph
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