Audio
The amber cable carries what you hear. Oscillator → Filter → Output is already a working patch.
Modular · a modular synth in your browser
Build music, one cable at a time.
Start with an oscillator, add a filter, and connect them to Output. Then bring in a beat, an echo, or an LFO that moves a control for you. Hear every change as you make it, record the result, and save your patch with a link — all in your browser.
Free · No installation · Save patches with a link
01 / SIGNAL FLOW
What travels through a cable?
The color tells you whether you are connecting sound, a changing control, or a command to play.
Control
The teal cable changes a setting for you: an LFO sweeps a filter, an envelope shapes volume.
Events
The pink cable says when to play. Clock counts the steps; Keyboard sends notes.
02 / START PATCHING
Your first patch in three steps
- 01
Add a source
Choose Oscillator or Drone. This is where your sound begins.
- 02
Connect Output
Draw a cable from the source to Output. Add a Filter or Reverb between them when you are ready.
- 03
Compare by ear
Press Listen and change one setting at a time. You will hear exactly what each module does.
Three ideas for your first patch
Build a small chain, listen, then change one piece to make it your own.
A long, gentle tone
Drone → Filter → Reverb → Output
Roll off the sharp highs with Filter, then add space with Reverb. Drone keeps playing without a keyboard.
A beat on every step
Clock → Sequencer → Drum → Output
Clock sets the pace; Sequencer places the hits. Change one step’s probability so the pattern does not repeat exactly.
A note that changes color
Oscillator → Filter → Output · LFO → Filter cutoff
A slow LFO moves the Filter cutoff. The same note grows brighter, then softer. Speed up the LFO and compare.
03 / MODULE REFERENCE
66 modules, explained one by one
Pick what you want to do: make a sound, find a rhythm, add motion, or shape a mix. Each card gives you a plain-language explanation and an idea to try.
Sound sources
A tone, noise, a drum hit, or a sample: this is where the sound begins.
01
Drone
A sustained low tone from a few detuned oscillators
Try this
Send Drone through Reverb to turn a held tone into a soft bed for a melody.
02
Voice
A polyphonic voice with envelope and filter that plays notes
Try this
Connect Keyboard to Voice and play a few notes of different lengths.
03
Oscillator
A simple tone generator at a fixed frequency
Try this
Run Oscillator through Filter. Lower the cutoff and hear the tone change.
04
Noise
White, pink or brown noise for wind, rain and textures
Try this
Roll off the highs with Filter: a hiss becomes a gentle rustle.
05
Wavetable
Eight waves the Position knob glides between
Try this
Connect an LFO to Wavetable position so the tone keeps changing on its own.
06
Complex Oscillator
Two oscillators with FM and AM plus a wavefolder — the west coast
Try this
Play from Keyboard and raise the modulation until a clear tone turns metallic.
07
String
A Karplus–Strong pluck: harp, koto, guitar — no samples
Try this
Send Sequencer notes to String for a short plucked melody.
08
Formant
Vowels A-E-I-O-U on one knob — a choir without samples
Try this
Hold a note and change the vowel to make the synth sound almost human.
09
Additive
Eight harmonics with their own levels that slowly drift
Try this
Add harmonics one by one and hear a simple tone grow richer.
10
Supersaw
Seven detuned saws spread across the stereo field
Try this
Run Supersaw through Filter to soften its broad, dense sound.
11
Texture
A rain of sine drops, noise grains or clicks
Try this
Add Reverb to Texture until separate grains blend into a sound bed.
12
Resonator
A bank of resonances: any signal becomes a string, a bar or a bell
Try this
Run a short drum hit through Resonator and tune the resulting ring.
13
Drum
Synthesized hits: kick, snare, wood, metal
Try this
Trigger Drum with Clock and choose a sound for a steady pulse.
14
Sampler
Plays a sample from notes: one-shot, looped or granular
Try this
Load a short sound and play a melody with it from the onscreen Keyboard.
Rhythm and notes
From a steady pulse to a melody that changes a little each time.
01
Clock
The patch's metronome: fires triggers in time with the BPM
Try this
Connect Clock to Sequencer, then change the tempo and hear the patch speed up.
02
Divider
Passes every Nth trigger
Try this
Put Divider after Clock so Drum plays once every four pulses.
03
Chance
Passes each event with a given probability
Try this
Run Clock through Chance so some drum hits disappear at random.
04
Random Note
Emits a random note in a range on every trigger
Try this
Trigger Random Note with Clock and hear a new melody on every pass.
05
Quantize
Snaps any note to the nearest one in the chosen scale
Try this
Send Random Note through Quantizer so its surprises stay within a chosen scale.
06
Sequencer
Up to 32 steps in four banks; each step has velocity, length, probability and shift
Try this
Place notes on the steps, then change one step while the melody plays.
07
Chord
Builds a chord on every note with a slight strum
Try this
Send one note into Chord and try different intervals between its voices.
08
Euclid
Spreads N hits over M steps as evenly as possible
Try this
Spread three hits across eight steps for an even but unexpected rhythm.
09
Progression
A chord sequencer that follows the degrees of a scale
Try this
Choose a few chords and loop them as the foundation of a track.
10
Turing Machine
A shift register of random bits: the melody locks or mutates
Try this
Drive Turing with Clock: a short phrase repeats, then gradually changes.
11
Déjà Vu
Random notes with memory: repeat, replace or forget
Try this
Route notes through Déjà Vu to hear a familiar phrase return with variations.
12
Logic
AND, OR, XOR over two streams of triggers
Try this
Combine two rhythms with Logic so a hit occurs only when your condition is met.
13
Bernoulli
A coin: every event goes either left or right
Try this
Send a pulse into Bernoulli and connect its outputs to two Drums: one path wins each time.
14
Burst
One trigger becomes a run of N: rolls and ratchets
Try this
Send one pulse into Burst to turn a single hit into a short roll.
Motion and modulation
Envelopes and control signals make sound change over time.
01
LFO
A slow wave that modulates knobs on other modules
Try this
Connect LFO to Filter cutoff so the sound alternates between bright and muted.
02
ADSR
An envelope: attack, decay, sustain, release from a gate
Try this
Control a VCA with Envelope to give a note a sharp attack or a long fade.
03
Note → CV
Turns notes into gate, pitch and velocity as CV
Try this
Convert Keyboard notes to CV and send it to Oscillator pitch.
04
CV → Trigger
Fires an event when CV crosses a threshold on the way up
Try this
Turn LFO movement into triggers that can play a Drum.
05
Follower
Tracks the loudness of a sound and outputs it as CV
Try this
Send microphone audio to Follower so Filter responds to the volume of your voice.
06
S&H
Captures a CV value on each trigger and holds it
Try this
Feed Noise and Clock into Sample & Hold for random values that change in steps.
07
Macro
One big knob that turns many parameters at once
Try this
Link Macro to several controls and reshape the whole patch with one move.
08
Timeline
A slow CV that travels a curve over a number of bars
Try this
Draw a slow Filter opening in Timeline to reveal the sound near the end.
09
Function
Rise and fall with a shape: envelope, LFO and end-of-cycle trigger in one
Try this
Draw your own curve in Function and use it to control volume through a VCA.
10
Slew
Cv cannot change faster than Rise and Fall allow
Try this
Pass sudden CV jumps through Slew so Filter moves smoothly instead.
11
CV → Note
Any voltage becomes notes in a scale
Try this
Convert a moving CV signal into notes and send them to Voice: a wave becomes a melody.
Sound shaping
Adjust tone and level, add echoes, or prepare a mix to record.
01
Filter
Removes highs, lows, or everything but a band around the cutoff
Try this
Lower Filter cutoff after Oscillator to take the edge off the high frequencies.
02
Overdrive
Soft clipping from warm saturation to a dense crunch
Try this
Add Overdrive to Drum and compare a dry hit with a heavier one.
03
Mastering
Final mix processing, peak control and WAV recording
Try this
Place Mastering after Mixer and set the level before recording.
04
Delay
An echo with feedback, tempo-synced or free
Try this
Add Delay to a short note and set the time between its echoes.
05
Reverb
Space: from a small room to an endless hall
Try this
Send a dry String pluck into Reverb to hear it in an imagined space.
06
Chorus
Widens and thickens the sound, like several players at once
Try this
Add Chorus to Voice and compare its width before and after processing.
07
Compressor
Evens out loudness; the Side input gives sidechain pumping
Try this
Run Drum through Compressor to smooth out overly loud hits.
08
EQ
Three bands, low, mid and high, each with its own gain
Try this
Cut muddy mids with EQ or give the low end more weight.
09
Pan
Moves sound left and right and controls the stereo width
Try this
Move Pan slowly from left to right to send the sound between your speakers.
10
Crossover
One audio input, three outputs: low, mid and high
Try this
Split a mix into low and high frequencies and process each part separately.
Mixing and routing
Blend sources, switch paths, and set conditions.
01
VCA
An amplifier whose volume is controlled by CV
Try this
Run Oscillator through VCA and open its volume with an Envelope control signal.
02
Mixer
Sums four audio signals into one, each with its own level
Try this
Blend Drum and Voice in Mixer, then adjust their balance.
03
Attenuverter
Scales and offsets CV, and can flip its sign
Try this
Reduce an LFO with Attenuverter so the Filter moves only a little.
04
Crossfade
Blend smoothly between two audio or CV signals
Try this
Blend a dry sound with its delayed version and glide between them.
05
Signal Switch
Choose A or B by hand or with CV
Try this
Connect two sources to Switch and choose which path you hear.
06
Math
Add, multiply and transform audio or CV
Try this
Add the movements of two LFOs together and send the result to Filter.
07
Compare
A signal condition: 1 when true, otherwise 0
Try this
Set a threshold in Compare and send its CV output to a VCA: a loud voice opens the sound.
Play and record
Play onscreen or with MIDI, load a file, or record your microphone.
01
Keyboard
An on-screen piano and QWERTY keys: play notes by hand
Try this
Connect Keyboard to Voice and play your first notes right on the screen.
02
MIDI In
Notes, gate, velocity, mod wheel and pitch bend from a MIDI controller
Try this
Connect a MIDI keyboard to Voice and play from physical keys.
03
Audio In
A microphone in the patch: live sound as an audio signal
Try this
Allow microphone access and send live sound through Reverb.
04
Audio File
A WAV or MP3 audio source: play, pause, seek and loop
Try this
Load a recording, select the part you want, and send it through an effect.
05
Looper
Records a few bars and cycles them, with overdubbing
Try this
Record a short phrase from the microphone, then layer another over it.
On the canvas
See the waveform and label the parts of your patch.
01
Scope
Shows the waveform or the spectrum of a signal
Try this
Connect Oscillator to Scope and compare the shapes of different waves.
02
3D Scope
Live waveform or spectrum history in a rotatable 3D view
Try this
Send a mix to 3D Scope to see how the sound changes over time.
03
Image
An image, cover or visual reference on the canvas
Try this
Place an image beside your patch to remember the mood you were after.
04
Note
A sticky note on the canvas: a comment, a section name, instructions
Try this
Label areas of your patch “bass”, “rhythm”, or “try later”.
Output
This is where the sound reaches your speakers.
01
Output
The way to the speakers: everything you hear passes through it
Try this
Finish the audio chain with Output so you can hear the patch.
04 / QUESTIONS
New to Modular?
Do I need to know music theory?
No. Start with a preset or connect Drone to Output. Every module is labeled, and this guide has an example for each one.
What is saved in a patch?
The modules, cables, and settings. You can reopen the patch with a link. Microphone audio and an external MIDI device do not travel with that link.
Can I record the sound?
Yes. The studio records and exports WAV. Your browser will ask permission before using a microphone.
MODULAR / STUDIO
Hear it for yourself.
Start with a preset or build a chain of your own. Save anything you want to hear again.