27 May
2003
27 May
'03
8:10 p.m.
Hi Clemens,
Before I reply below; with your instructions which due
to my lack of familiarity I only partially grasp, I've
configured a setup where Input ports are working but
the output ports aren't open/opening.
The output ports in this simple setup are used to
transmit MTC generated by Ardour back to the mixing
consol (Tascam DM-24) in order to sync the Ardour and
DM-24 transports.
To be half way there is very encouraging. Anyway, I'll
reply to your suggestions below.
--- Clemens Ladisch <clemens(a)ladisch.de> wrote:
Well, what I said earlier isn't entirely correct,
accessing
/dev/snd/midiC1D0 will open the first free port.
Connecting ports will
open them, so the first free port in your case was
probably Port 8.
And when you connect port x to port 0, data from the
device at port x will
be written to port 0, but you won't be able to read
it from port 0 because
MIDI Out 1 and MIDI In 1 are different ports.
Here's what I've got and you'll notice "Output: NONE".
I've been staring at all this for awhile and am not
improving my understanding.
./rawmidi -v -i hw:3,0 -I /dev/snd/midiC3D0
Using:
Input: device hw:3,0
Output: NONE
snd_rawmidi_open hw:3,0 failed: -2
Read midi in
Press ctrl-c to stop
read f0
read 7f
read 01
read 06
read 01
read f7
The "read:_N" are an mmc stop instruction. BTW,
'ctrl-c' fails to exit rawmidi, I have 'kill...'.
Anyway, at this point I need a device with both the
Input and Outputs that are open.
The ALSA library hides the device files behind
device names. Instead of
accessing the ALSA device files directly, you are
supposed to use some
program which uses the ALSA library.
Does this apply to applications? If yes, then Ardour
accessing the Alsa device="/dev/snd/midiC3D0" directly
should be changed to use the Alsa library. Yes, no?
There is an ugly test program which can display the
data from an ALSA
rawmidi port in the alsa-lib/test directory. Please
go there, run "make
rawmidi", and start it with
./rawmidi -v -i hw:1,x
It's telling us a story. :)
I appreciate all the help,
ron
HTH
Clemens
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