Sequencers Page

Sequencer Mark III "The Arpulator"

The latest design is an extention of the Darwinator ca lled the "Arpulator"
This replaces the switches with an A/D and PAL to give per stage mode control.

The way the modes are laid out for the pots in the second row of the Arpulator

SEQUENTIZER MARK II "THE DARWINATOR"

A variation on the sequantizer module engineered by Darwin Grosse. Heavily oriented towards sequencing (hence "sequEntizer"). This unit is designed to bring the TB-303 performance controls (stage selectable glide and accent) to a package like the ARP sequencer. Each row has three 3-position switches selecting between two busses and a neutral middle position.

In order the controls are:

• Stage indicator LED
• Tuning Knob
• Octave Up Bus
• Octave Down Bus
• Glide Bus
• Reset Bus
• Accent Bus
• Skip Bus

The bottom row of controls is:

Stage select | Clock Int/Ext switch | Tempo | Tempo LED | Reset Pushbutton | Glide time

Like the module version, this unit can be clocked at audible rates and act as a waveform source. The inclusion of the exclusive or "sequantizing" circuitry allows the unit to act as a complex waveform multiplier for two audio sources. This produces sounds related to, but more complex than, ring modulation. The equivalent patch in this mode uses two octave dividers and three ring modulators.

This module contains an on-board clock source. This is intended for applications where this module is the master clock source. The on-board clock source features high stability and ranges between 20 and 220 BPM. Visual indication of clock speed is provided. The preferred clock source is always the "Digital Noiseshapers" exponentially controlled, wide range, clocking module.

The on-board clock source:

• Has a RUN/STOP switch. In the STOP position, pulses applied to the external clock input are automatically routed to the gate output.
• Is externally synchable by narrow positive (+10V) pulses.
• Can be held off by external positive (+10V) gate.

The module version has a number of features added over the prototypes. The quantizer has been added with improved capabilities for octave transposing. Circuitry has been added to allow chaining of two units to form a sixteen stage sequencer. They can also be parralleled to add additional rows of control voltages. The same PCB has been designed to fit the module and "Darwinator" versions of the unit. So all the features in the "big" unit are in the module except for the switch marix.

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