Officially, in terms of what you can play from the keyboard, you can program 8 parts to have whatever upper and lower key limits you want. So you you could split the keyboard into 8 different regions each with their own sound, if you want (you can overlap them too, if you want).

By looping back and addressing parts 9-16 via MIDI, you can apparently even increase that 8 to 16.

There are 16 maximum note ranges - one for each Part.

One thing to add about note limits - a note limit can be defined as what I would call a "negative range". You can define a Part note limit as a range of notes that will not be inside the range. This is done by using a larger note value for the "low" value vs the "high" value.

By defining the range this way, you can setup a range like this:

[C-2========(High Range Note)]----------------[(Low Range Note)=========G8]

Where notes inside [=====] are the active notes and notes between (bot not including) High Range Note-Low Range Note are not active. This way - you can define two different regions (an upper and lower) using one note range.

An example would be if the High Range Note was C2 and the Low Range note is C4. When the "Low" Note is greater (higher) than the "High" Note - one of these negative ranges is setup.

I personally haven't found a huge call to use this feature - but it's there.

Strictly speaking - for AWM2 sampled sounds - each Part (which can be defined as one note range for the entire Part) can be comprised of 8 total elements. And EACH of these 8 elements can have its own note limit. Therefore - you can use individual elements within a single Part to create a split. The limiting factor is that each element will need to share other resources that are defined at the Part common level. Still, you can get up to 8 "splits" inside a single Part if you can manage to use a single waveform (element) per split and also manage the other resource constraints.

Given this, you could get (with a considerable amount of work) up to 8x8 = 64 splits under direct control and up to 8x16 = 128 splits when adding the 8 Parts (9-16) that require "external" control.

Also, if you count the negative note ranges as being 2 "split" regions - then you would double each of the above assuming every range is defined as negative.

What is the maximum number of splits that can be programmed on a modx 6?

If you want to use it as a master keyboard for controlling other instruments /VSTis, it can be split into a max of 8 Zones and each Zone can be assigned a different MIDI channel.

Which is interesting, considering that most higher end MIDI controller keyboards have at most 4 zones.

Which is interesting, considering that most higher end MIDI controller keyboards have at most 4 zones.

4 is pretty common, but lots of boards with MIDI controller functions can even do 16. In current models, that includes Korg Kross/Krome.Nautilus/Kronos, Kurzweil PC4/Forte/K2700, Roland FA/Fantom.

Native Instruments Komplete Kontrol S series is 16 zones (although this requires a PC for full support the way that controller works). Novation's top end (SL MKIII) supports 8 zones. Doepfer LMK4+ is 8 zone.

On the MIDI controller + (plus other things) side, Viscount's Physis K4/K5 EX are said to be powerful controllers with lots of assignment flexibility and 8 zones. The Alesis QS8 is discontinued but supports 16 zones.