MFOS Soundlab with MIDI and other mods

YouTube Uploaded by clackbeetle on Apr 27, 2011

"I had some parts laying around from Various jobs at clacktronics, so rather than waste them I thought I would create a synthesizer. I had a PCB for the soundlab from a workshop I did and I tried to make it behave more like a performance synthesizer, this involved modding and calibrating it to behave properly.

It is for sale so email Ben@clacktronics.co.uk for enquiries and any questions - for thos of you interested I will be posting this mods shortly on clacktronics.co.uk

The Mods I have added to the Soundlab are as follows

An Octave Switcher - single switch that changes the pitch from a very low C and six octaves up, for both VCO's

Improvement to CV summing - the original Soundlab drags the CV's down to almost -15 for the filters and VCA, but with MIDI and an octave switcher this makes the LFO to VCO almost useless as the pitch drags right down and the switcher cant bring it up high enough. To fix this I made all CV's operate around GND and created a separate mixer that buffers and pulls the voltages down for the VCA/VCF. This means you can add the LFO or AR to the VCO's and they will modulate the pitch around the set note making vibrato sounds much easier.

The MIDI part of the synthesizer is a MIDImplant by Roman Sowa, The pitch CV directly controls the VCO's and the gate goes to the AR generator. The MIDImplant has 2 CV's though so I added a switch that allows the second VCO to be controlled by the second CV - the only problem is that it has to be controlled on a second MIDI channel as the Implant cannot do polyphonic assigning of the CV outputs. The second CV is normally connected to the VCA or VCF inputs this allows velocity or mod wheel control (this will be demonstrated in another video) All the MIDI settings are on the back of the Soundlab and the assignment of MIDI channel and parameters are all controlled by a single button.

The power supply - It runs of an AC adaptor that supplies Ray Wilsons wall wart supply inside at -/+15v, this means it can interact with normal synthesizers more easily taking CV's upto 10v and normal gate levels (the sockets are provided on the back)

Please note that I have only just finished this synth and there needs to be a bit more calibration!!

MIDImplant can be found here
http://www.midimplant.com/

the Soundlab here
http://www.musicfromouterspace.com/analogsynth/SOUNDLABMINISYNTH/soundlab.php...

My Page
http://Clacktronics.co.uk"

Update:

MIDI Soundlab Bassline