MuSeq and uTable

A few people have spotted a couple of new modules in a recent video I uploaded to YouTube where I was having a play with my modular synth.

There are two modules in use that aren’t available yet, so I’ll explain.

MuSeq

This is, rather predictably a step sequencer, but I’m taking what I’ve learned from developing GorF and starting again which gives me the opportunity to add in a bunch of features that I never had time to implement.

Currently MuSeq has 8 steps, two CV outputs and two gate outputs.
Each step has it’s own OLED display showing what is going on for that step, note, length, gate, tie, skip, etc
You can skip steps (up to 7), you can also tie steps together and of course not trigger a gate (a bit like a rest, though the CV still changes).
Both CVs are 1V/oct, but currently CV-A shows a scale according to note (i.e. C, C#, D, etc) and CV-B is a value from 0 to 511.
Each step can have it’s own step length, be it 1/4 notes, 1/8th notes, 1/6ths and even triplets, the whole range is there from 1/1 to 1/32 notes.
Each step also has a ratchet option (which you can hear in the video above) with the option to double, or triple fire the gate.
It also can store and load sequences from a FAT32 formatted micro SDCard, so you can back up and share your sequences quickly and easily.

There are a few currently un-implemented sockets, for 5 pin DIN connectors, STG Clock connectors (in and out) on the rear of the PCB and also two inputs (CV or gate) and two outputs (CV or gate).

Things that I will be adding, in no particular order;
* MIDI In/Out (for clock and note)
* SYNC 24 In/Out (For clock)
* CV/Gate inputs for Clocking or anything else (e.g. tempo)
* Bank play mode (like GorF)
* Chain mode (Chain two patterns to get 16 steps)

So there is still a lot of work to do on this, it will take a few more months before it’s completed, and there will be panel revisions also.

uTable

I wanted to have a bunch of oscillators for those ‘big’ modular sounds that modulars are so well known for. Now I also wanted them to be slim as my latest oscillators have been 2U and 3U wide. Me being me I wasn’t content with a regular sine/saw/square type oscillator, so of course I made a single 1U wide wavetable oscillator. But it has a few differences.

Firstly there is a switch on the front that lets you choose between wavetable mode, stepped mode (so waveforms just jump rather than transform) and also pulse width modulation, all the way from 0% to 100%.

Secondly, and this is where it gets special, there is a switch to flip between regular FM and through zero FM. So now you can do through zero FM with wavetables, and it sounds incredible.

What’s the big difference between regular FM and through zero FM, well, simply put as the incoming FM CV drops below zero with a regular FM it will simply “stop” the oscillator, with a through zero FM oscillator the output waveforms starts reversing and then the pitch increases as the CV goes further negative. These creates a much more ‘musical’ sounding FM than you get with regular FM.

Now this also needs some work, currently there’s a small amount of jitter around the crossover point which causes a nasty click with low modulation depths, and I need to modify the crossover circuit to resolve this.
I also need to adjust the range of the fine control, which right now is about 3 octaves (whoops).