Re: HDSP 9652 MIDI IN - stuck notes

[Takashi Iwai <tiwai@suse.de>]

At 26 Feb 2003 20:47:41 -0800,
Mark Knecht wrote:
> 
>    If I then change my keyboard to drive the HDSP 9652 input 1 (Alsa
> 64:0) and change the connections internally to drive all of outputs, I
> get stuck notes pretty much immediately. It seems a bit worse with the
> sustain pedal, but does not seem to be effected at all by controllers.
> It is heavily effected by the MIDI note density. If I hit only one or
> two notes, I'm not likely to get it, but using the sustain pedal I can
> create the problem in under a minute.
> 
>    To be sure it's the input and not the outputs (as much as I can be) I
> have external synths attached to the Alsa outputs on 64:0, 72:0 and
> 72:1. When I get a stuck note, I seem to get it on both internal soft
> synths and all three external hardware synths at the same time. For this
> reason I deduce that it is the HDSP input that is not clearing out
> whatever event queue that holds this stuff and somehow the note never
> shuts off.

to be sure, the configuration which doesn't work is like below, ok?

	HDSP MIDI1 input -> softsynth

and/or
	
	HDSP MIDI1 input -> HDSP MIDI1 output -> external device

at least, we need to check whether the interrupts for MIDI are
generated properly.
please try the following.

1. connect HDSP MIDI1 input to HDSP MIDI1 output via aconnect.
2. trigger a note from MIDI1 input.
   check whether the IRQ count in /proc/interrupts (for HDSP)
   increases.
   during this test, don't use HDSP audio.


Takashi


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