[CM] common music, portmidi, filling up queues?

[Rick Taube]

nando -- i just tried your example with 1000 events and didnt have this 
problem on OS X. what is the value of  *portmidi-default-outbuf-size* ? 
it should be 2048. if its not then try setting it to a larger value or 
\ open portmidi explicitly and pass the value to it:
	(portmidi-open :outbuf-size 2048 ... )
as far as i can tell, that is the only method portmidi gives to 
increase queue size. if increasing this number doesnt fix the problem i 
think there must be some portmidi/linux issue on lurking.

btw it seems from your backtrace that my portmidi error reporting isnt 
working.

On Jan 31, 2006, at 7:46 PM, Fernando Lopez-Lezcano wrote:

> Hi all, I'm running here a CM snapshot from 2005.12.15 and I'm having
> problems with portmidi. It looks like when the portmidi/alsa internal
> buffer becomes full Common Music just throws an error and that's it. 
> For
> example this plays fine (you have to open the portmidi device first):
>
> (events (process for i from 0 below 250
>                  output (new midi :keynum (+ 60 (mod i 40)) :time 
> (now))
>                  wait 0.01)
>         "midi-port.pm")
>
> add one more note (251 instead of 250):
>
> (events (process for i from 0 below 251
>                  output (new midi :keynum (+ 60 (mod i 40)) :time 
> (now))
>                  wait 0.01)
>         "midi-port.pm")
>
> and I get:
> --------
> bad argument to ERROR: #.(SB-SYS:INT-SAP #XB7FEBDDD)
>    [Condition of type SIMPLE-TYPE-ERROR]
>
> Restarts:
>   0: [ABORT-REQUEST] Abort handling SLIME request.
>   1: [ABORT] Exit debugger, returning to top level.
>
> Backtrace:
>   0: (SB-KERNEL:COERCE-TO-CONDITION #.(SB-SYS:INT-SAP #XB7FEBDDD) NIL
> SIMPLE-ERROR ERROR)
>   1: (ERROR #.(SB-SYS:INT-SAP #XB7FEBDDD))
>   2: (PORTMIDI:WRITESHORT #.(SB-SYS:INT-SAP #X082809F0) 3094653 
> 8340864)
> [MUNCH]
> --------
>
> Using "(rts" instead minimizes the chance of this happening but the
> error can be triggered...
>
> What could I do about this (other than sending few notes :-)?
> -- Fernando
>
>
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