[CM] Multiple midi ports

[Heinrich Taube]

the code isnt written to do this -- there is nothing to stop it being  
implemented however, i just decided not to tackle it until there was a  
need. the main issue would be how to address the different devices.   
for example there could be a :port  option to the mp output :

(mp:midi :key 50 :chan 0 :port 3)


input is harder, the eaiest would be to still have only one hook but  
to pass it a extra 'port' value.



> Is there an example somewhere that shows how to send different  
> events to different midi output ports?
>
> Also, how do I provide hooks to receive events from multiple midi in  
> ports simultaneously?
>
> Thanks,
>