Music Thing Modular Turing Machine Mk II

Random looping sequencer for evolving generative melodies

10 HP Eurorack module

The Turing Machine Mk II is a random looping sequencer for Eurorack modular synthesizers. It generates evolving CV and gate patterns by randomly flipping bits in a shift register, with a probability knob controlling how chaotic or locked the sequence becomes. Its musical character ranges from perfectly locked melodic loops to wildly unpredictable generative sequences, making it ideal for self-playing patches and evolving compositions.

Features

• 8 or 16-step looping shift register sequencer
• Probability knob controls randomness from locked loop to total chaos
• 10 red LEDs display current sequence state
• CV output via DAC0800 for melodic sequencing
• Gate output derived from shift register bits
• Auxiliary output for additional CV or gate signals
• Clock input for external sync
• Reset input to restart sequence
• Length CV input for voltage-controlled loop length
• Probability CV input for voltage-controlled randomness
• Range CV input for voltage-controlled output scaling
• Rotary switch for 7 selectable loop lengths: 2, 3, 4, 5, 6, 8, 16 steps

Controls & Jacks (19)

• Scale— Controls the probability of random changes occurring in the sequence
• Noise— CV input to modulate sequence length
• Out— Outputs gate signal for each step
• Chance— Sets the range of CV output voltage
• Clock In— Receives clock/timing trigger to advance the sequence
• Length— Sets the length of the sequence from 2 to 32 steps
• CV— Outputs the sequenced control voltage
• Pulse— CV input to modulate probability
• Write— Selects between different sequence generation modes
• CHANCE— Controls the probability of random changes occurring in the sequence
• SCALE— Sets the range of CV output voltage
• WRITE— Selects between different sequence generation modes
• LEDs— 10 red LEDs showing the current state of the shift register bits in the sequence
• Reset In— Resets the sequence to the beginning
• CHANCE CV— CV input to modulate probability
• SCALE CV— CV input to modulate output range
• CV OUT— Outputs the sequenced control voltage
• PULSE OUT— Outputs gate signal for each step
• MIX OUT— Auxiliary CV output

How-To Guides

• Locked Melodic Loop
• Slowly Evolving Ambient Melody
• Chaotic Generative Sequence
• Voltage Controlled Probability
• Generative Drum Trigger Patterns
• Phrase-Locked Generative Sequence
• Generative Bass Line
• Dual Voice Generative Patch
• Morphing Loop Length
• Initial Calibration

Explore the interactive Turing Machine Mk II panel on BleepDex — tap any control to learn what it does.