Fonitronik mh11 Quick Start Manual

Adc sequencer

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mh11 – ADC Sequencer – Quick Start

music electronics made in germany

Sequencer controls:

Clock input and manual step button: Apply a clock signal here (i e LFO) It is

Clock input and manual step button: Apply a clock signal here (i.e. LFO). It is

great if you have a clock with PWM. Why? Just because the width of the

sequencers trigger output pulses follows the clocks pulse width.

Reset input and manual reset button: When high the sequencer resets to step

on. As long as the reset is high, the sequencer will not step forward.

8x Step controls, Outputs, sequencer visuals:

For each step there is a knob to set the CV output value, and a mode switch

to set this steps status (ON, OFF, ADC). Whenever the sequencer steps to an

active step the set CV value, a gate (as long as the whole step, consecutive

gates merge), and a trigger (as long as the clock signal) will be available on

the outputs.

There is a passive attenuator for the CV output.

For inactive steps 0V will be seen on the CV output.

For all steps that are in ADC mode the status will be set by the ADC module

to the left (red).

The upper yellow LED-Array tells you what the actual sequencer is doing: it

indicates the current step, and if a gate or trigger output is active.

ADC module:

Here voltages are converted to an 8-bit code (hex). This voltage can be set

manually (Offset, Fine), or one could use an external pattern control voltage

(PCV). The PCV input has an attenuator.

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The actual ADC wants to see 0-5V. To keep your pattern control voltages in

this window the attenuator and the offset controls form a voltage processor.

This processed voltage is also available at the PCV out.

Each of this 8 bits corresponds to one of your sequencers steps. If it is "I" it

would set the corresponding step to ON, if it is "O" it would set it to OFF (if this

steps mode switch is set to ADC, of course!).

Think this 8-bit code as a pattern: IIOIIOIO (and all possible 256 combi-

nations can be achieved)

The lower red LED-Array shows the actual pattern (depending on your mode

switch and PCV settings), and below that it provides two warning LEDs (PCV

<0V or >+5V).

)

Refer to block diagram on next page also.

page 1

Table of Contents

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Summary of Contents for Fonitronik mh11

Page 1 – ADC Sequencer – Quick Start music electronics made in germany Sequencer controls: Clock input and manual step button: Apply a clock signal here (i e LFO) It is Clock input and manual step button: Apply a clock signal here (i.e. LFO). It is great if you have a clock with PWM.
Page 2 So you could i.e. set steps 1, 4 and 7 to always ON, step 2 and 8 to always OFF, whereas the other steps are controlled by the ADC module. To understand what's happening, feed the mh11 a clock and set all step switches to the up/ ON position. All steps play. Then 'mute' certain steps by setting the switch to the OFF position.
Page 3 The socket X6 is for connecting an expander module (not released yet). Here the current pattern is available. Don’t connect anything if you don’t know what you do. If you need more technical information, contact fonitronik. Connecting the module to the Doepfer Eurorack-Buss: The module comes with a ribbon cable.