Re: [Denemo-devel] midi input

[Richard Shann]

On Wed, 2008-11-05 at 12:55 -0600, Jeremiah Benham wrote:
> > I have both alsa and jack installed I think,
and timidity
>  but I
> > have no /dev/sequencer
correction, I have this
>  - I don't know what might create that (it would
> > have to be a soft synthesizer as I don't have dedicated hardware).
> 
> You probably don't have a hardware synth in your sound card.
right, the sound support is on the motherboard
>  You can
> emulate one with timidity or other software. By default ubuntu lauches
> timidity in damen mode. Anything written to /dev/sequencer is sounded
> via timidity as the events are received.  
Ok, this is what I need I think. I have timidity installed, but no
daemon running. Also I have both /dev/sequencer and /dev/sequencer2 but
only the second responds to the ioctl (sequencer_fd, SNDCTL_SYNTH_INFO,
&card_info) call in midi.c
it comes back with this:

Synthesizer detected: Midi Through Port-0
Synthesizer supports 16 voices.

but when I do
 
$ aseqdump
Waiting for data at port 128:0. Press Ctrl+C to end.
Source_ Event_________________ Ch _Data__
The data that comes out when denemo starts doesn't look convincing
it starts with Port subscribed, but after that ...
 0:1   Port subscribed           15:1 -> 128:0
 15:1   Control change          0 123   0
 15:1   Control change          0 121   0
 15:1   Pitch bend              0       0
 15:1   Control change          1 123   0
 15:1   Control change          1 121   0
 15:1   Pitch bend              1       0
 15:1   Control change          2 123   0
 15:1   Control change          2 121   0
 15:1   Pitch bend              2       0
 15:1   Control change          3 123   0
and so on until
 15:1   Control change         15 123   0
 15:1   Control change         15 121   0
 15:1   Pitch bend             15       0
  0:1   Port unsubscribed         15:1 -> 128:0
  0:1   Port subscribed           15:1 -> 128:0
  0:1   Port unsubscribed         15:1 -> 128:0

turning on playnotes() in denemo (it is commented out at the moment)
spews out similar looking stuff for each note played. I don't get
anything coming from the loudspeakers.

If I try running a timidity daemon with

$ timidity -iAD
TiMidity starting in ALSA server mode
Opening sequencer port: 129:0 129:1 129:2 129:3

this seems to have no effect on all the above dignostics.
You mentioned that midi.c was broken - do you recall in what way it was
broken? Was it working at one time?
Should /dev/sequencer take the raw midi data that my music-keyboard is
putting out?
Is there a way to test it (iv I cat a midi file at it I get
cat junk.mid > /dev/sequencer2
cat: write error: Invalid argument

If anyone can help, with suggested diagnostic procedures etc, please do,
and thanks in advance.

Richard