The attached manual is for the 2hp TM, a compact probabilistic random sequencer/CV generator. On its own, it does not quantize pitch, clock itself, or generate gates for note articulation beyond responding to an incoming trigger. But as a melodic utility in a Eurorack system, it can be very effective when paired with a clock/trigger source, quantizer, VCO/voice, and optionally sample & hold, slew, logic, or modulation.
The TM outputs a 0–5V random control voltage at its OUT jack whenever it receives a trigger or gate at TRIG.
Its key idea is that it does not behave like pure chaos all the time. Instead, it stores a sequence of step voltages and uses a probability control to decide whether each step changes or remains the same as the sequence advances.
This is best thought of as a Turing Machine-style looping random melody source: - At high probability settings, the melody changes constantly. - At low probability settings, the melody becomes increasingly repeatable. - At 0% probability, it acts like a locked sequence. - Changing STEPS changes phrase length. - Changing AMP changes melodic range before quantization.
That makes it very useful for: - generative melodies - evolving basslines - semi-repeating motifs - controlled random transposition - modulation of melodic parameters
Each trigger advances the TM. The output voltage is quantized into musical notes, giving you a melody.
The quantizer turns the TM’s raw random voltages into scale tones. The TM’s probability memory gives the result more structure than pure sample-and-hold randomness.
Same as above.
You now have a repeating melodic loop with up to 32 steps.
Momentarily bring PROB left to let a few notes mutate, then return right. This gives subtle phrase evolution without losing the identity of the melody.
Because the output range is reduced with AMP, the quantizer sees a narrower CV span, which often creates tighter melodic contours suitable for basslines.
The phrase length changes over time, causing the melodic cycle to shift.
This is great for: - non-repeating ambient melodies - phase-like pattern changes - evolving techno arps
Subtle modulation of STEPS CV tends to be more musical than wild jumps.
The melody moves between: - highly unstable / novel - semi-repetitive - fully locked
This is one of the strongest features of the module. You can automate tension and release: - verses: lower probability, more repeatability - transitions: higher probability, more mutation - breakdowns: fully random - choruses: locked phrase
Since TM is only one module, the "used together" part really means how it works alongside other common Eurorack categories.
This is the most important partner.
TM outputs continuous random CV from 0–5V, not discrete musical notes. A quantizer converts that into a scale.
If the quantizer supports transposition, feed a second CV source into transpose for harmonic movement while TM handles note selection.
TM needs external timing.
Changing the trigger rhythm changes the perceived sequence as much as changing the pitch data.
Once quantized, TM can drive: - a sine or triangle oscillator for simple melodies - a wavetable VCO for animated lead lines - a complex oscillator for experimental phrases - a full voice module for compact patches
TM does not produce note gates for articulation by itself beyond reacting to incoming triggers. So you usually pair the same trigger source, or a related rhythm source, with an envelope/VCA path.
Placing a slew after the quantizer or before the oscillator can create: - portamento - gliding random melodies - smooth ambient pitch transitions
Very effective for generative melodic textures.
These can further structure TM’s output.
Since TM outputs 0–5V, you may want to control register.
A self-evolving melody with recurring fragments and shifting phrase lengths.
A stable but mutable riff generator. Great for live performance by nudging PROB.
Correlated melodic layers from the same evolving sequence.
Instead of controlling oscillator pitch directly: - TM OUT → quantizer → oscillator FM amount CV - or TM OUT → filter cutoff CV - or TM OUT → wavefolder symmetry
You preserve a fixed melody elsewhere while TM adds pseudo-melodic internal motion.
It sits between random source and sequencer.
One knob move on PROB can move the patch from chaos to motif.
At 2hp, it gives a lot of melodic utility in very little space.
STEPS from 1–32 lets it do anything from drones to long evolving patterns.
This is deceptively useful. Lowering amplitude before quantization can keep melodies focused and musical.
You will usually want an external quantizer for tonal melodies.
Needs external triggers.
This means phrase alignment with other sequencers may be less exact than with a traditional sequencer.
Depending on your oscillator and quantizer, this can span a wide register. You may want attenuation, offset, or transposition management.
A strong musical workflow with TM is:
This makes TM especially strong for: - ambient - Berlin-school style generative sequencing - minimal techno - experimental tonal patches - evolving soundtrack textures
The 2hp TM is best used as a probabilistic CV melody source. It becomes a powerful melodic tool when combined with: - a trigger/clock source - a quantizer - a voice or oscillator - and optionally CV modulation, slew, switching, or transposition
Its musical sweet spot is generating phrases that feel alive, semi-repeatable, and gradually mutating, rather than fully programmed or fully random.
If you want, I can also turn this into: 1. a patch recipe list, 2. a beginner-friendly explanation, 3. or a “best companion modules” table.