Make Noise — Maths

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Manual PDF

Make Noise MATHS: using it to create melodic components

MATHS is not an oscillator or sequencer in the traditional sense, but it is extremely useful for building melodic structure in a Eurorack patch. From the manual, its main strengths are:

• function generation: envelopes, LFOs, cycling slopes
• slew / portamento
• CV mixing, inversion, offset generation
• analog OR / max selection
• gate extraction, pulse delay, clock division
• comparator-like and logic-like patch behavior

That means MATHS is best understood as a melody shaper, melody animator, and melody utility brain. It can help generate, process, quantize-friendly, rhythmically reshape, and articulate pitch CV.

What MATHS contributes to melody

To make melody in modular, you usually need some combination of:

• pitch CV source
• timing / trigger source
• articulation / envelopes
• variation / modulation
• mixing / offsets / inversion
• sometimes portamento / slew
• sometimes clock division / rhythmic derivation

MATHS covers most of the support roles.

Core melodic uses

1. Portamento and glide for pitch lines

One of the most direct melodic uses:

• patch a sequencer or keyboard CV into CH 1 or CH 4 Signal Input
• take Unity Output or Variable Output
• send that to your oscillator’s 1V/oct input

Then use:

• Rise to control upward glide time
• Fall to control downward glide time
• Vari-Response to shape the glide curve

This is especially powerful because MATHS gives you independent up/down slew. That means:

• rising notes can glide slowly
• falling notes can snap quickly
• or the reverse

That produces melodic phrasing impossible with a simple one-knob slew limiter.

Musical results

• acid-style slides
• “lazy” upward inflection on arpeggios
• asymmetrical lead phrasing
• humanized pitch movement

2. Mixing and offsetting pitch CV

Channels 2 and 3 can act as:

• attenuverters for incoming CV
• DC offsets when nothing is patched

This is very useful for melody because you can:

• transpose a melodic sequence
• add vibrato depth
• combine multiple pitch influences before they hit a quantizer or oscillator
• invert a melodic contour

For example:

• sequence into CH 2
• slow LFO into CH 3
• CH 2 and CH 3 mixed at SUM OUT
• send SUM to a quantizer or oscillator pitch input

This creates: - transposed melody - drifting melodic variation - interval modulation

Because CH 2 can generate up to about ±10V offset and CH 3 about ±5V, they are also useful for manual transposition.

3. Creating stepped melodic variation via gate-derived timing

MATHS itself is not a pitch quantizer, but it can create timing structures that drive melodic events.

Using:

• EOR from CH 1
• EOC from CH 4
• cycling channels
• trigger inputs
• pulse delay / clock division patches

you can derive alternate clocks for:

• sequencer advance
• sample-and-hold triggering
• quantizer triggering
• envelope triggering for notes

Why this matters melodically

A lot of melody comes from when notes happen, not just which pitches occur. MATHS can generate: - delayed note entries - divided trigger streams - flams - syncopated derived clocks - self-modulated pulse trains

So even if another module produces pitch, MATHS can make it melodically expressive.

4. Envelope generation for melodic articulation

CH 1 and CH 4 can each be used as: - AD envelopes via Trigger Input - ASR-style envelopes via Signal Input - cycling modulation sources

This helps with melody in several ways:

• shape amplitude per note
• shape filter per note
• shape FM amount per note
• shape wavefolder depth per note

That turns a static pitch sequence into an actual melodic line.

Example

• sequencer pitch -> oscillator 1V/oct
• gate -> MATHS CH 1 Trigger
• CH 1 output -> VCA CV
• CH 4 cycling slowly -> filter cutoff or FM depth

Now melody has: - note contour - dynamic phrasing - timbral movement

5. Vibrato and expressive pitch modulation

Set CH 1 or CH 4 to cycle as an LFO:

• linear response for triangle-like vibrato
• ramp or skewed shape for more character
• audio-rate if you want aggressive FM-like sidebands

Patch: - Unity or Variable Output -> oscillator pitch input, ideally through attenuation

Or better: - use CH 2 / CH 3 to scale the vibrato depth first

Musical uses

• subtle lead vibrato
• delayed vibrato if triggered from a gate structure
• asymmetrical or vocal-style pitch wobble
• animated bassline tuning movement

6. Building more complex melodic modulation with SUM / INV / OR

The SUM, INV, and OR outputs are especially good for melody support.

SUM OUT

Use it to combine: - pitch sequence - transposition offset - vibrato - envelope amount - random drift

Then send to: - quantizer - oscillator pitch - filter tracking destination

INV OUT

Use it to create mirrored contour: - melody rises while another parameter falls - or invert a pitch modulation before mixing

OR OUT

This outputs the maximum positive voltage among inputs. For melody, that can be used as: - a “highest wins” contour selector - a way to combine envelopes into one accent stream - half-wave rectification of modulation before it affects pitch

This is less traditional for pitch itself, but very useful for accent and phrasing logic around melody.

Practical melodic patch ideas from the manual

1. Glide sequencer patch

Use MATHS as an asymmetrical slew on pitch CV.

Patch

• sequencer pitch CV -> CH 1 Signal Input
• CH 1 Unity Output -> oscillator 1V/oct
• tune Rise and Fall to taste
• Vari-Response near log or linear

Result

• controlled glide between notes
• different feel going up vs down

Nice additions

• send gate accent to Rise CV or Fall CV
• use CH 2 or CH 3 to attenuate that modulation

This can make only accented notes glide.

2. Manual transposition bus

Patch

• sequencer pitch -> CH 2 Signal Input
• leave CH 3 input unpatched to use its offset
• mix with SUM OUT
• send SUM -> quantizer or oscillator

Result

• CH 3 becomes a transpose knob
• CH 2 sets pitch scaling/polarity

Good for: - key changes - chorus lift - bass transposition

3. Envelope-shaped pitch bend

Patch

• trigger stream -> CH 1 Trigger Input
• CH 1 Unity or Variable Out -> oscillator pitch FM input or mixed into pitch CV path
• attenuate carefully
• short Rise, medium Fall

Result

• each note gets a pitch sweep
• classic synth “pluck” or tom-like attack bend
• expressive lead attack inflection

If you run this into a quantizer after mixing, it creates stepped ornament behavior; if directly to pitch, it makes continuous bends.

4. Vibrato under performance control

Patch

• CH 4 in cycle mode
• CH 4 output -> CH 2 Signal Input
• CH 2 output or SUM output -> oscillator pitch modulation input
• use CH 2 attenuverter as vibrato depth control

Result

• manual vibrato amount
• can be faded in live

Further: - patch gate or pressure CV to CH 4 Cycle Input for run/stop vibrato - or to Both CV for vibrato speed changes

5. Delayed note trigger for melodic swing

From the manual’s pulse delay concept:

Patch

• clock or gate -> CH 1 Trigger Input
• take EOR OUT as delayed trigger
• send EOR to:
• envelope trigger
• sequencer advance
• sample & hold trigger

Result

• delayed note onset
• laid-back phrasing
• pseudo-swing
• staggered melodic layers

Fall affects pulse width, Rise affects delay.

6. Clock division for melodic density control

Patch

• master clock -> CH 1 Trigger Input
• use EOR or EOC-like derived behavior as divided output
• send that divided clock to sequencer advance or quantizer trigger

Result

• melody moves slower than the master rhythm
• changing Rise changes the melodic division ratio feel
• useful for polyrhythmic note progression

7. Complex LFO as melodic source into quantizer

The manual includes triangle/ramp/self-cycling patches. If you patch a cycling channel into a quantizer, it becomes a pitch source.

Patch

• CH 1 cycling, linear or skewed response
• output from Unity Out
• send to quantizer input
• quantizer output -> oscillator 1V/oct

Result

• repeating melodic contour
• triangle gives pendulum-like melodies
• ramp gives rising phrases with reset
• skewed response changes how long notes dwell in parts of the scale

Very musical and simple.

8. Dual interacting functions into quantizer

Using both CH 1 and CH 4:

Patch

• CH 1 cycling slowly
• CH 4 cycling at a different rate
• combine with SUM OUT
• send SUM -> quantizer
• quantizer out -> oscillator pitch

Optionally: - use EOR and EOC to cross-trigger one another - modulate each other’s Rise/Fall/Both

Result

• semi-repeating melodic phrases
• evolving contour
• complex but still bounded pitch movement

This is one of the strongest “melody from utilities” uses of MATHS.

9. Sample-and-hold melodic system support

If you have a sample-and-hold or random voltage source elsewhere, MATHS makes it more melodic.

Use MATHS for:

• divided or delayed triggers to clock the S&H
• slew on the sampled voltage
• offset/transposition before quantization
• envelope generation for note articulation

Example

• noise/random -> S&H input
• MATHS EOR -> S&H clock
• S&H out -> CH 1 Signal Input for glide
• CH 2 offset added via SUM
• SUM -> quantizer -> oscillator

Result

• random but shaped melodies
• smoother intervals
• playable transposition

10. Accent extraction and phrase shaping

Use the OR bus and end-of-stage outputs to derive accents.

Patch idea

• multiple modulation sources to CH 1–4 variable outs
• OR OUT -> VCA CV or filter accent
• sequence pitch from elsewhere
• note trigger from MATHS-derived clocks

Result

• melody gets dynamic accent patterns
• “strongest of several motions” becomes accent contour
• useful for techno, IDM, generative lines

Best melodic workflows with MATHS

A. With a sequencer

MATHS is best used to: - slew pitch - transpose - generate envelopes - derive alternate clocks - add vibrato and bends

B. With a quantizer

MATHS becomes much more melodic with a quantizer downstream: - cycling functions become scale-based melodies - mixed CV becomes harmonic motion - offsets become musical transposition - self-patched complexity becomes usable pitch material

C. With oscillators and VCAs

MATHS gives: - note articulation - accent - vibrato - pitch glide - timbral contour

D. In generative systems

MATHS can act as: - timing brain - contour generator - CV mixer - event derivation source

That makes it excellent for evolving melodic patches even if no traditional sequencer is present.

Particularly strong melodic patch combinations inside MATHS itself

1. CH 1 or 4 cycling into quantizer

Simple repeating melody source.

2. SUM of CH 1 + CH 4 into quantizer

More complex melodic phrase source.

3. CH 2 and CH 3 as transpose + interval offset

Great for harmonic movement.

4. EOR / EOC used as note clocks

Excellent for rhythmic melody generation.

5. Slewed sequence + envelope pitch bend

Classic expressive mono synth behavior.

A few concrete musical examples

Acid-style lead

• sequencer pitch -> CH 1 Signal In
• CH 1 Unity -> oscillator 1V/oct
• gate -> CH 4 Trigger
• CH 4 out -> VCA/filter
• use CH 1 Rise/Fall for slide
• use CH 4 for snappy envelope

Generative melody

• CH 1 cycle slow
• CH 4 cycle medium
• SUM OUT -> quantizer
• quantizer -> oscillator
• EOC or EOR -> envelope trigger
• CH 2 offset for transposition

Bassline with accents

• sequencer pitch direct to oscillator
• MATHS derives divided/delayed trigger stream
• CH 1 envelope -> VCA
• OR OUT -> filter accent
• CH 4 cycling slowly -> subtle pitch wobble

Ornamented lead

• base pitch sequence -> oscillator
• CH 1 triggered envelope mixed lightly into pitch
• CH 4 cycle as vibrato
• CH 2 controls vibrato depth
• delayed EOR triggers occasional secondary envelope

Bottom line

MATHS creates melodic components less by “playing notes” directly and more by controlling the things that make notes musical:

• pitch movement
• glide
• transposition
• articulation
• timing
• accent
• phrase variation
• complex CV generation for quantized melodies

If you pair it with: - an oscillator, - a quantizer and/or sequencer, - a VCA/filter,

then MATHS becomes an extremely powerful melodic utility and generative composition tool.

For melody specifically, the most important tricks are:

1. slew incoming pitch CV for expressive glide
2. mix and offset CV for transposition and interval shaping
3. use cycling outputs into a quantizer for self-generated melodies
4. derive clocks with EOR/EOC for rhythmic note structure
5. use envelopes for pitch bends and articulation
6. combine channels with SUM/INV/OR for evolving melodic modulation

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