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Re: [fluid-dev] Reading input from a MIDI device

From: Vesa Paatero
Subject: Re: [fluid-dev] Reading input from a MIDI device
Date: Tue, 17 Dec 2013 22:54:48 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.2.0

On this Linux system, the MIDI keyboard is in /dev/dmmidi2 and when
I try "cat /dev/dmmidi2" I get characters on screen when pressing the
Hmm, interesting. Anyway, I think the raw midi device is in
/dev/snd/midiC*D* (but I'm not sure it's as easy to open and test)

Here is a command line whereby the system works with "noteon":

fluidsynth -v -a alsa -o synth.gain=3.0 -o synth.verbose=yes
The easiest way is to use the alsa rawmidi driver. Find the card name by
looking at the /proc/asound/cards file - find the row corresponding to
the right sound card, and the label within brackets.
In my case it's "Piano", so then the options I need to add are:

" -m alsa_raw -o midi.alsa.device=hw:Piano"

(of course in your case replace "Piano" with your card name)

Thanks for these hints, David. Raw MIDI without any mixer activity by CPU sounds like a good choice to minimize latency.


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