[[Sold] 2 pre-soldered GM5 chips including PCBs]

Hey midiboxers,

 

selling 2 pre-soldered GM5 chips with the small PCBs from this bulk-order:

 

 http://www.midibox.org/dokuwiki/tk_gm5_bulkorder

 

Update: – sold.

 

Jakob

[Bulk Order #3 of SoundWell rotary encoders **SPARE BOX OF 96**]

encoders received.

Thank you Wilba

Kind regards

koppi

[Bulk Order #3 of SoundWell rotary encoders **SPARE BOX OF 96**]

Wilba, I'm in for a set.

[GM5: Least-cost USB-MIDI Interface Chip for 4.50 EUR]

Hm - seems, that this is my first post, so -- Hello MidiBoxers!

Just finished soldering and testing the first GM5x5x5 interface:

• http://twitpic.com/1wdtk
  
• http://twitpic.com/1wdv8
  
• http://twitpic.com/1wjdu
  

Thorsten, thanks a lot for synchronizing your GM5 bulk order with the GM5x5x5 bulk order!

And, Nils - thanks for designing this nice PCB! It is totally awesome.

Thanks to ploytec.com for coding this genuine firmware (- can you give me a hint, how you managed to get the fifth uart work this smooth on this tiny avr chip?).

Kind regards,

++koppi

Update: Wrote a small linux application called "alsa-midi-latency-test" to benchmark the GM5 Midi USB interface chip and my midi setup. Here is a small screenshot: http://twitpic.com/1y188 - please pm me, if you're interested in the linux application and willing to test it with your midi setup. I need more benchmark results to see, if the app's timing results are calculated correctly.

One thing, which would be really nice to test is: build a long midi chain "[PC] --> [iN1] --> [PC] --> [OUT1] --> [iN2] --> [PC] --> [OUT2] --> [iN3] --> [PC] --> [OUT3] --> [iN4] --> [PC] --> [OUT4] --> [iN5] --> [PC] --> [OUT5] --> [PC]" and see, if any kind midi message gets lost with heavy midi traffic. How is the latency in this kind of setup?

Update2: Just uploaded the source of the application to github: http://github.com/koppi/alsa-midi-latency-test/ Feedback, benchmarking results and patches are greatly appreciated.