Monday, March 20, 2017

DRE4MTR4CK Eurorack Sequencer Module


The DRE4MTR4CK is my prototype eurorack module that has been two months in development. DRE4MTR4CK is a simple and intuitive chromatic pitch CV sequencer in a mere 12HP.

It has 4 independent, externally clocked tracks with 4 steps each. Each track sends pitch CV to one of your VCO modules. With external clocking, you decide if timing is slow and dreamy, bouncy and up-tempo, or all out fury going into audio rates.

Unused clock inputs are multiples from input 1. Clocking can be interrupted for a track by inserting a floating patchcord. Manually trigger a track step using the TRIG buttons. Intuitively build evolving chords or poly-rhythmic note progressions.

Simple pattern modes and Octave transpose for each track provide seemingly endless note progression. Mix things up with Step reset and track data Rotate to re-circulate CVs among your VCOs. 16 memories are provided for program note data storage. Recall of programs during performance provides changes in melodic or chord structures on-the-fly.

***** SPECS ******
4-tracks
4-steps per track
Chromatic Scale Note Quantization
4x4 LED Matrix

EACH TRACK has
- 1 external clock input.
- 1 duplicated, unbuffered clock out signal for clocking other devices
- Independent Pattern selection: Forward/Reverse/Forward-Reverse/ZIGZAG
- pitch CV output 1v/oct over 5v range
- Octave Transpose +/- 2 octaves selection
- Store/Recall 16 non-volitile memories in EEPROM
- Note programming on a per-step basis

Clocking Behaviour Options
- Unused clock inputs are duplicated from input #1
- Interrupt clocking by inserting a floating patchcord
- Manual trigger sent to clock out using the TRIG buttons

Programmer Interface
- 1 Data Pot
- 12 Momentary Buttons
- 16 LEDs

Memory and Processing
- 16 non-volatile memories in EEPROM for note data
- Processing Speed: 20MHz

INPUT 1/8" MINIJACKS
- 4 clock inputs
- 1 control input for RESET
- 1 control input for ROTATE

OUTPUT 1/8" MINIJACKS
- 4 unbuffered clock outputs (multed from inputs) + manual trigger
- 4 buffered 1V/oct pitch CV outputs, each 0-5v

Internal Clocking: none
External Clocking: 4 inputs

SIZE: 12 HP (60.60mm) Eurorack format, 3U high

POWER OPTIONS
Accepts standard keyed 2x8 (16-pin) eurorack ribbon cable (included)
Jumper/Shunt Setting:
- Option #1. (default) uses 5v input from your system power supply (if provided)
- Option #2. Draws power from +12v line. Requires Maxim Integrated
700-REF02CP 5v regulator (sold separately)

MEASURED CURRENT DRAW
Option #1 (default): 5v from Euro Power
+12v @ 3 mA
-12v @ 3 mA
+5v @ 103 mA Peak, 5 mA typical
Option #2: 5v from REF02 chip
+12v @ 64 mA Peak, 8 mA typical
-12v @ 3 mA


The DRE4MTR4CK module has no affiliation with any persons with similar name.

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