Bug reports & end-user support for Akai's MPC Software 'controllers' including the new MPC Studio 2, the MPC Touch, MPC Renaissance & original MPC Studio and MPC StudioB lack.
By Mtain89 Sat Jun 07, 2014 2:55 am
Hello folks!! I'm having some issues recently with my MPC REN about mono and poly... I know this questions gets asked pretty frequently, but im still having issues figuring this out.... When a sample is Poly, does that mean its stereo? Every time i load a sample on the software, or record it from my record player, i chop the sample up and have my drums laid out on one pad bank, and my sample on the first pad bank. I change the program settings to poly from mono, and the chopped sample part overlaps each other... When i put it back to mono the sample plays the way i want, but the drums cut off the sample part and it doesnt sound right. Does the sample have to be in mono? Or is there a way i can set up something to have it play the way i want? Just letting you know folks im fairly new to the whole MPC thing, (used maschine and FL studio before). Iv'e had my mpc ren for about 3 months and this didnt happen before in the beginning! Please help!
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By fdodds Sat Jun 07, 2014 3:29 am
there are program settings, and pad settings for poly and mono.

poly means overlapping samples, mono means samples cut each other off (nothing to do with stereo, in this case monophonic refers to multiple keys playing at once, not a mono audio channel)

so if you have drums and samples in the same program, you need to set the program to poly so your samples and drums overlap.

then you should set each individual sample pad to mono. you can find the pad mono/poly settings in the bottom panel on your computer screen when you're in program edit mode, all the way on the right (the mono/poly settings on the left are for the whole program). if you've got a few different samples or chops, you will probably want them all to mute each other. you should set them all to the same mute group within program edit, that way each pad that you have set to the same mute group will cut each other off.
By Mtain89 Sat Jun 07, 2014 3:58 am
Ok I have 16 different samples, and three drum samples on a different pad bank... what mute group setting do i need to have?
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By MPC-Tutor Sat Jun 07, 2014 7:54 am
Mono = monophonic, i.e. only one sound plays at a time
Poly = polyphonic, i.e. multiple sounds can play on top of each other.

In an MPC, polyphony can be set on a program-wide basis, which controls the way all the pads in a program interact with each other.

Separately it can also be set on a per-pad basis, but this only controls how that particular pad interacts with itself.

Example 1: Drum Kit

Assume you have a simple drum kit:

A1 = kick, A2 = snare, A3 = closed hat, A4 = open hat

For a natural sounding drum kit, set the entire program to POLY. This way, by default, all pads will 'overlap' each other, just like a real drum kit would - i.e. play the kick followed by a snare and you'll still hear the kick tail playing underneath the snare.

Now look at each individual pad. In the MPC Software, the default pad play setting is MONO. This means if you play that same kick on A1 three times quickly in succession, each subsequent play will cut out the previously playing kick, so there's no overlap of those three kicks. This setting is independent of any other pad, so if you quickly played a hi hat on top, it would still overlap the kick (thanks to the program POLY setting).

Setting pad play to POLY (default setting for all other MPCs) means three successive hits of A1 will overlap, which for a booming 808 kick would probably cause gain issues. However for a 'natural' drum kit, I tend to prefer setting individual pads to POLY as it often sounds more realistic, because in real life you would still hear some reverberation from that original kick and leaving that overlap tends to mimic this - MONO just doesn't sound right in many cases. Another example is cymbals - setting a ride pad to MONO just sounds awful when you're playing a ride pattern with it, it's much better to hear it overlap itself (IMO).

The other thing to look at are the hats. In reality, the open hat on A4 is actually the same instrument as the closed hat on A3, so with your open hat playing, any instant of the closed hat should immediately cut off that open hat - this mimics the opening and closing of the actual hat.

To do this, you can use MUTE GROUPS. Simply set A3 and A4 to MUTE GROUP 1. This is a two way mute - i.e. A3 mutes A4 and A4 mutes A3. If you prefer a one way mute, use MUTE TARGETS.

Example 2: Bass Program


Most bass lines sound better if the bass sounds do not overlap, so if you have a bass instrument program, simply set the whole program to MONO play and one one bass note can ever be heard.


Example 3: Chopped break program


If you've chopped a break into 16 equal slices, you'll usually want to set the program play to MONO to ensure those chops do not overlap. However the problem with this is that if you also chopped out an individual snare and then wanted to overlay some ghost snares and rolls, those rolls would also be affected by the program MONO setting and would therefore cut out the main break completely. There is no way to override the program wide MONO setting on a per-pad basis, unless....

Workaround: have your snare on a separate program, or more conveniently, set your entire program back to POLY and then set all the pads to MUTE GROUP 1 apart from your individual snare. With all pads set to the same mute group, the effect is identical to MONO program play, however this way you get to opt out' certain pads from being included.

I go into this in more detail with lots of practical examples in my 'MPC: Sampling Laid Bare' book:

http://www.mpc-samples.com/product.php/ ... laid-bare/
By Mtain89 Sun Jun 08, 2014 6:12 am
Ok thanks a lot guys i really appreciate the time. I got it all fixed and everything is the way i wanted it to be. Thanks for the help i understand now what mono/poly means! thanks guys!