acidlab M303 User Manual

Introduction

Thank you for purchasing the M303.
The M303 is a monophonic, analogue synthesizer module.
It is recommended to control the M303 with the CV In, Gate In and Accent In from the

Autobot or the Bassline3.
Other CV/Gate-Sequencer will work in the same way, but maybe they have not the

exactly timing and groove of the TB-303 sequencer.
The M303 works like the synthesizer-section of the Bassline3, with much more sound

variations in your modular system, than known from any other TB-303 modifications.
Everything, from abstract filter-sweeps to percussion-sounds is possible.

In comparision to the Bassline3 or the TB-303, the resonance range is extended, that
the filter can be played without the VCO.

The M303 circuits of the VCO, VCF, VCA and the envelopes are the same that are
used in the original TB-303 bass synthesizer, with a lot of additional features.

The VCO has an additional temperature-compensating circuit, to insure VCO long­time-stability over life-time and changing ambient temperatures.

To get an idea about the possibilities of the sound-generation of the M303, it is
best, to take a look on the block-diagram!

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