Forum to discuss all matters relating to the MPC1000 and MPC2500 operating systems created by 'JJ' (all versions).
By shredkeenan Sun Mar 18, 2012 1:27 pm
I have been playing around with my new MPC 1000 this weekend and am running the free JJ OS v3.13.

I created a multisampled piano program, with the pads assigned chromatically (screenshot below).

Image

For the most part it works beautifully. All the samples trigger correctly when I play the pads on the MPC, however when I use a midi controller, there are three notes that don't correctly trigger.

A1 played on midi keyboard is triggering A#2 sample
D1 played on midi keyboard is triggering E1 sample
C1 played on midi keyboard is triggering C#1 sample

It doesn't make sense because if I play the pads assigned to A1, D1, and C1 and send MIDI to my keyboard, it plays the correct samples and makes the keyboard sound the correct pitch. If I do the opposite and play the keyboard, I get the correct keyboard note but the wrong samples in these 3 cases.

Everything looks to be set up correctly in the program, and I get the same behavior from 2 different midi controllers. Is this a known issue or did I somehow screw something up?
By elmacaco Wed Mar 21, 2012 8:33 pm
You're probably doing something wrong.

check the midi note assignments for the pads for those weird notes, and check in step edit while hitting the bad keys on the controller and see what is says. Double check the rest.
By shredkeenan Mon Apr 09, 2012 1:37 am
I still haven't solved this and really think this is a bug. As you can see by my screen shot, the midi notes are correctly assigned chromatically to the pads.

I decided to make a recording and check it in step edit as elmacaco suggested. I started recording, and banged away on one of the problem pads, A11, which corresponds to a MIDI 45 (A1) note. As I recorded, the pad sounded the correct A1 note sample which I assigned to it, but when it looped and started replaying, the sound changed! The sequencer recorded the correct A1 MIDI information.

Has anyone else had anything like this happen? I can't see what I might be doing wrong.