Re: [linux-audio-user] Spiral Synth and MusE

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Subject: Re: [linux-audio-user] Spiral Synth and MusE
From: Takashi Iwai (tiwai_AT_suse.de)
Date: Wed Apr 24 2002 - 20:03:06 EEST

At Wed, 24 Apr 2002 12:53:43 -0400 (EDT),
Bill Allen wrote:
>
> This is a similar question to that which Dave Phillips asked about
> RTSynth. I want MusE to drive SS. I assume that since SS uses /dev/midi as
> input that I need to use aconnect to connect one of the virmidi outputs to
> the midi input, then set a track on muse to output to the virmidi port.
>
> My ports are:
>
> [bill_AT_localhost music]$ aconnect -lo
> client 64: 'External MIDI 0' [type=kernel]
> 0 'MIDI 0-0 '
> client 65: 'OPL3 FM synth' [type=kernel]
> 0 'OPL3 Port '
> client 72: 'Virtual Raw MIDI 1-0' [type=kernel]
> 0 'VirMIDI 1-0 '
> client 73: 'Virtual Raw MIDI 1-1' [type=kernel]
> 0 'VirMIDI 1-1 '
> client 74: 'Virtual Raw MIDI 1-2' [type=kernel]
> 0 'VirMIDI 1-2 '
> client 75: 'Virtual Raw MIDI 1-3' [type=kernel]
> 0 'VirMIDI 1-3 '
> [bill_AT_localhost music]$ aconnect -li
> client 0: 'System' [type=kernel]
> 0 'Timer '
> 1 'Announce '
> Connecting To: 63:0
> client 64: 'External MIDI 0' [type=kernel]
> 0 'MIDI 0-0 '
> client 72: 'Virtual Raw MIDI 1-0' [type=kernel]
> 0 'VirMIDI 1-0 '
> client 73: 'Virtual Raw MIDI 1-1' [type=kernel]
> 0 'VirMIDI 1-1 '
> client 74: 'Virtual Raw MIDI 1-2' [type=kernel]
> 0 'VirMIDI 1-2 '
> client 75: 'Virtual Raw MIDI 1-3' [type=kernel]
> 0 'VirMIDI 1-3 '
>
> But when I aconnect 72:0 64:0, I can't start SpiralSynth. If I start
> SpiralSynth first, then I can't do the aconnect. I've got to be seriously
> confused about how things work, or something is wrong with my setup - I'm
> betting (and hoping) on the former.

this is because either SS or virmidi blocks /dev/midi.
the mpu401 device has exclusive access. i.e. only one application
can use the device. (while virmidi accepts multiplex r/w accesses.)

the solution is to change the SS's configuration to use
/dev/snd/midiC1D0 instead of the default /dev/midi.
then choose 'VirMIDI 1-0' from muse. you don't need to run
aconnect.

HTH.

ciao,

Takashi

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