At Fri, 8 Oct 2004 11:26:39 -0400 (EDT),
Patrick Dumais wrote:
> 
> I noticed that some drivers tend to send "batch" note-on commands. I mean:
> instead of sending 90h,01h,7Fh everytime, it sends a first 90,01,7f then
> just 02,7f etc... It sends the noteon command only once and assumes that
> your application will set itself in a "noteon receive" mode. This is very
> annoying because my application expects to receive a command byte each
> time. the emu10k1 driver doesn't do that, but snd-virmidi does.

Yes, virmidi reduces the command byte when the identical
running-status is kept.

Note that this is the correct MIDI implementation.  Many devices
output in this way (although many don't).


> I'm using virmidi because I want 2 apps to read my sbLive midi port. I
> aconnect this port to 2 virmidi ports then my apps read from those ports.
> 
> Is there any way that I can configure virmidi so that it sends commands
> the conventional way, or any other way that I could have 2 applications
> reading on the same midi port? (using the alsa sequencer interface is not
> an alternative method that I want to consider for the scope of my
> applications)

The attached (untested) patch will add no_status option to snd-virmidi
module.  When this is set to 1, the running-status is always output as
you like.

But, again, reducing the identical running-status is the feature of
MIDI byte stream.  Your app should really handle it.


Takashi