Hack your MiniBrute into a Modular MEGABRUTE!

Tuesday, January 28th, 2014 | Building Things, Electronics, Modular Synth, Music!

MEGA!

The MiniBrute (MB) is an affordable analogue mono-synth which offers several Control Voltages (CVs) for use with modular synth systems. As standard you get:

Pitch out

Gate out

Gate in

Amp in

Filter in

Pitch in

Main audio out

Headphone out

Audio in

Midi in

Midi out

This is amazing for a synth of this price but inside the MB lurk many more useful CVs! Opening up the synth you will see there are many test points, these are all numbered and will make the task of modifying your MB a piece of cake.

I spent the last week poking around with a osciloscope and discovered lots of useful CV signals and waveforms just waiting to zip in to a modular system. Here is what i found:

Power (small board middle, ground main board lower left)

PT742 +12v

PT743 -12v

PT720 / PT 605 3.3v

PT175 Ground – there are loads of ground points to choose from, try and stick with one though.

Envelopes (large board upper left)

PT105 Filter Envelope

PT112 Volume Envelope

LFOs (large board lower middle – these all respond to tempo and are MIDI beatclockable!)

PT59 Random Steps

PT58 Smooth Steps

PT35 Sine

PT32 Triangle

PT34 Saw

PT33 Square

Oscillators (large board mid right – respond to pitch)

PT13 Square

PT158 Sub (square or sine as selected on MB panel)

PT22 Triangle (+metaliser if activated)

PT19 Triangle (clean)

PT20 Saw (the modulating wave for this is PT65)

PT57 Noise

PT151 some kind of folded triangle ( |\/|/\| )

Clocks (large board bottom left)

PT136 Clock out

PT145 Clock in (see special tap emulation circuit)

Modulation (small board bottom right)

PT656 After Touch

PT655 Mod Wheel

PT654 Pitch Bend

there is a thread about the mods on Muffwiggler

And I’ve uploaded fairly comprehensive mod instructions here MegaBrute Leafcutter Mods 03.pdf

Have Fun!

 

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