Forum to discuss all matters relating to the MPC1000 and MPC2500 operating systems created by 'JJ' (all versions).
By Sander Tue Oct 07, 2008 9:18 pm
Here are two examples of a noterepeat, holding one pad, 120BPM, 1/16 timing
I trigger a Korg Mono/Poly synth with an internal midi->cv converter

On the MPC1000 with JJ os it goes just fine:

http://home.tiscali.nl/~smeyer/mpc1kmpnr.wma

But see what happens on the MPC 2KXL

http://home.tiscali.nl/~smeyer/mpc2kmpnr.wma

A rare timing and missing notes.

I have the same problem with the Juno-60 and a converter of the same company. Using a different converter (Kenton) it goes fine.

Also when I use the external CV/Gate inputs of the Mono/Poly with an external midi-cv converter is works great too.


Anyone got any idea why these converters have trouble with the 2K and not with the 1K?
By Sander Tue Oct 07, 2008 9:22 pm
Just tried it with JJ os 1, still no problems. I don't really like to put an Akai os on it to try.
By Forax Wed Oct 08, 2008 5:34 am
hmm not sure Sander.. does sound like something sketchy with the converter. maybe you could record the midi output into a sequencer and see what the difference between the data is. i dont have a midi cv converter but i bet thats really fun with note repeat.
By Sander Wed Oct 08, 2008 9:46 am
Forax wrote:hmm not sure Sander.. does sound like something sketchy with the converter. maybe you could record the midi output into a sequencer and see what the difference between the data is. i dont have a midi cv converter but i bet thats really fun with note repeat.


Hi Forax, I just got a reply of the manufacturer and he also suggest that recording:

Try to check and to compare MIDI data transmitted from your devices (MIDI ports) with any MIDI monitor. Use http://www.midiox.com for example.
A problem can be in Note-On and Note-Off command timing. The problem occurs if Note-On of next key is transmitted before Note-Off of previous key. By other words - new key is pressed before old key is depressed. Our MIDI converter can't press the same key twice so some keys are then lost.
By nanoloop Wed Oct 08, 2008 10:39 pm
go into step edit and make sure all your durations are good. i midified an sh101 and it did the same thing, then i got the synhouse jack and it had a 4note buffer, which got rid of the problem of overlaps.