Forum to discuss all matters relating to the MPC1000 and MPC2500 operating systems created by 'JJ' (all versions).
By gronsen Sat Aug 08, 2020 11:07 am
Hello MPC-maniacs,

I recently bought a MPC 1000 with JJOS2XL. I have to say I'm very convinced by this little thing. :worthy:

Although most of its functions are almost self-explanatory I can't figure how to lock/quantize the PLAY/Sequence-start to a constant MIDI-Clock (coming from another MIDI-Device) after stoping the MPC. I want to keep the MPC in perfectly sync. When I press PLAY it syncs again to the MIDI-clock but the timing is shifted by my not perfectly quantized pressing of the PLAY button.

This feature is for me quite essential, since one have to stop the MPC for certain functions but don't want to interrupt the playing for instance in a situation of a jam. (e.g. my Arturia Keystep starts/quantizes always to the MIDI-clock).

Is there any possibility to quantize the Play without restarting the whole MIDI-clock?
I somewhere read about pressing OVER DUB + PLAY but unfortunately it didn't worked out.

best, J
By Switchbox Tue Aug 25, 2020 4:27 pm
Hi there,
first of all let me explain how midiclock works.

its basically just a trigger sequence wit a start and a stop signal. ( ok , there is a continue also...but rarely used)

simple as this in decimals:

Start = 250
Stop = 252
Clock = 248

1 MIDI beat = a 16th note = 6 clock pulses ...so it looks like this: beat = (|- 248 - 248 - 248 - 248 - 248 - 248 -|)

(start) 250 |- 248 - 248 - 248 - 248 - 248 - 248 -|- 248 - 248 - 248 - 248 - 248 - 248 - | - 248 - 248 - 248 - .............
.........................- 248 - 248 - 248 - 248 - 248 - 248 -|- 248 - 248 - 248 - 248 - 248 - 248 -....................
................................- 248 - 248 - 248 - 248 - 248 - 248 -|- 248 - 248 - 248 - 248 - 248 - 248 - .....................
................ - 248 - 248 - 248 - 248 - 248 - 248 -|- 248 - 248 - 248 - 248 - 248 - 248 - ....252 (stop)

...how would the MPC know where it should drop in without getting a Start and Stop?...once started its getting only 248 as a constant signal...what is like a "chain" to lock in....
Also with Midiclock you loose the MPC Groove...no swing anymore ...just Straight, only if you go up to 60%...thats sh**

But what you should use is MTC - Midi Timecode ...this is a Timebased Clock and allows Starting and Stopping in between...it works pretty good, even with Next Sequence - Immediately Play ( Never works with Midiclock )
And the Swing is also back, since its not bind to a "locking grid".

How you will be able to use this depends on your Setup/DAW.

Cheers, Nik