Audio out
Record the patched master or select a supported audio device.
FREE · PATCHABLE SYNTHESIZER
ModularARK
Patch Lab
Build the signal path yourself. Every cable has a job, every module changes the system, and silence is often the best clue.
LIVE OUTPUTSYSTEM IDLE
OUTPUT ROUTING
Audio out + MIDI out
Capture the patched master, export the sequence, or route it to a supported audio or MIDI device.
MIDI out
Export the sequence or send its pitch and gate notes to a synth or DAW.
Ready to capture or route your sound.MIDI FILE MODE
MIDI file and WAV downloads work without an account. Live MIDI and audio-device selection depend on browser and operating-system support.
Clock
8-step sequencer
-12
-7
-5
0
+3
0
-5
-7
Oscillator A
Oscillator B
Mixer
Combine audio before shaping it.
Filter
Envelope
LFO
VCA
Audio level controlled by the envelope.
Delay
Output
ACTIVE CABLES · 12
LEARN THE PATCH
Connect.
Listen.
Understand.
The rack teaches by reacting. These notes explain what you just heard.
01Signal flow comes first+
A modular system has no assumed instrument architecture. Audio and control signals only travel where you patch them. Begin by tracing one complete path from an oscillator to the output, then add control signals one at a time.
02Audio, CV, gate and clock+
Audio cables carry sound. CV changes a parameter such as pitch or cutoff. Gate describes when a note opens and closes. Clock is a repeating timing pulse that advances the sequencer. The jack colours in this lab keep those jobs visible.
03Oscillators create raw material+
An oscillator repeats a waveform. Sine is pure, triangle is soft, sawtooth is bright and square is hollow. Tuning two oscillators by an octave, fifth or small detune changes the harmonic weight before the filter does any work.
04A sequencer controls pitch and time+
Each step stores a pitch offset and a gate state. Clock moves from one step to the next; pitch CV tells the oscillator which note to play; gate triggers the envelope. Remove any one of those cables and the behaviour changes.
05The filter shapes harmonics+
A low-pass filter removes energy above the cutoff, a high-pass removes energy below it, and a band-pass keeps a focused region. Resonance emphasises frequencies around the cutoff. Patch the LFO to Cutoff CV to hear the filter move automatically.
06Envelope and VCA shape a note+
The VCA controls amplitude. The envelope tells it how a note evolves: attack rises, decay falls, sustain holds and release fades after the gate. Without this control patch, an oscillator behaves like a continuous drone.
07Effects belong to the signal path+
Delay only affects sound routed into it. Time sets the spacing of repeats, feedback returns part of the echo to itself and mix balances dry and delayed sound. Moving the effect earlier or later in a real modular patch changes the result.
08A useful first experiment+
- Load the Classic patch and start the system.
- Remove LFO → Filter CV and compare the static cutoff.
- Reconnect it, then change LFO rate and depth.
- Remove Envelope → VCA to turn the sequence into a drone.
- Restore it and edit the eight pitch steps.