midi ports on linux

angelo_maci · 05-13-2010, 11:32 AM

hi
I created a nice midi application in java under windows with midi ins and outs.
When I run it in Linux I get few midi ports available: edirol interface midi in/out and two apparently useless internal synth/sequencer ports.
When I run other linux applications midi trough in/out ports appear but I just cannot find them in my java application.
Can you help me to get my application communicate with other linux application (alsa/jack) via midi?
How could I get some further midi ports like "midiyoke" on linux?
thanks in advance

Shadow_7 · 05-13-2010, 09:53 PM

$ timidity -Os -iA

synthesized in software for the soundcard. Or were you looking for physical I/O with a midi device / interface? Perhaps those are only visible when the interface is on, the midi device is on, and everything is connected. Or I could be wrong. The aforementioned assumes alsa was compiled with --enable-sequencer=yes and that timidity was compiled with synthesis options. You can use jackd with slightly different parameters. And many means to an end.

angelo_maci · 05-14-2010, 05:22 AM

Java takes note of the available midi ports in the system, at least it does so under Windows. When I use my application under Linux, Java recognizes just the Edirol interface and these two default ports but I need my application to communicate with other applications within the Linux system, so other ports are nedeed...

i92guboj · 05-14-2010, 06:08 AM

Does midi work at all in your linux installation? For that you need a midi synth, and most sound cards nowadays doesn't provide that (even the most expensive ones sometimes). So you need to use a soft-synth like timidity or fluidsynth.

So, if you are talking about midi hardware, you need the right driver for it (provided that such a thing exist).

If you are doing synth via software then you need to correctly set up a soft-synth as said above. Windows does this by default, it's a bit expensive in cpu terms though.

angelo_maci · 05-14-2010, 07:09 AM

Yes, java works, my application works and the other applications work.

"I need my application to communicate with other applications within the Linux system, so other ports are nedeed."

No hardware involved, no default soft-synth involved.

i92guboj · 05-14-2010, 07:25 AM

Ok, it seems like you might need to look into jack, phonon or something like that. There's an app called jack-rack which might be of interest to you if you want to know how to interconnect applications using jack.