Ralf Mardorf wrote:
> Sorry Rui, sorry list, but while there are a vast number of sides that 
> discuss and try to solve troubles with MIDI when using modern computers 
> that run Windows or MacOS, for Linux I only found stupid prejudices 
> about the MIDI standard, no serious discussion, no trouble shooting.
>
> I'll start a trouble shooting list. "If this or that happens, the course 
> might be this or that."
>
>   
Hi Ralf,

I've not responded to your earlier posts because I'm busy with three 
articles and getting ready for a student performance.

I have no special prejudices, stupid or otherwise, regarding MIDI. It 
works well for my purposes, and I've been using MIDI with internal and 
external synths for quite some time. My work is on-line, see 
http://linux-sound.org/ardour-music.html to find  it. The instrumental 
works are all MIDI compositions. In particular you might want to listen 
to the MIDI rendition of Stefan Wolpe's Form for piano and to my own 
Imaginary Trio for flute, guitar, and bassoon. Both of those pieces were 
made with internal synths. Carousel Ride is an earlier piece that was 
made with external synths (a lot of them), it's at 
http://linux-sound.org/audio/studiodave-carousel_ride.mp3 if you'd like 
to hear it.

I agree that more research into MIDI + Linux needs to happen. Perhaps 
you've seen this PDF :
/
/    
http://www.cc.gatech.edu/~mnelson/papers/Nelson_Thom_-_MIDI_Performance_-_NIME04.pdf

Unfortunately that research is old, but it could serve as a good 
jumping-off point.

> Has anybody experiences with MIDI by USB and MIDI by D-Sub MPU-401? What 
> is the more stable interface for Linux?
>   

I've used a MidiMan 2x2 USB interface with good results. I currently 
employ a SoundBlaster Live! and a SoundBlaster PCI128 for their hardware 
MIDI ports. I have a Yamaha MJC8 that lets me connect those interfaces 
to external gear or between computers in the studio. I've also used the 
hardware interfaces to test MTC transmission/reception in Ardour.

I can't involve myself further at this time. My workload is heavy and I 
need to devote my time to getting it done. I suggest that you start your 
trouble-shooting list and start reporting results from commonly 
available gear. A software test suite is essential, I'll be happy to run 
short tests as time permits.

Btw, the Linux MIDI Howto is terribly out of date. Perhaps someone from 
the LA* communities can take the time to update this rather significant 
document ?

Best,

dp

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