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Synth Lab

Oscillator

Envelope (ADSR)

Filter

Effects

Test Keyboard:

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Core ToolReal-time

Synth Lab - Online Synthesizer with ADSR & Effects

Design custom synth sounds with oscillator control, ADSR envelope, filter, reverb, and delay. Test your patches with virtual keyboard playback.

Free browser-based synthesizer with full control
Launch Synth Lab
4 (Sine, Square, Saw, Triangle)
Waveforms
Full ADSR control
Envelope
Filter, Reverb, Delay
Effects
Free
Price
Synthesizer interface with ADSR and effects
Shape sounds with oscillators, filters, and effects

Why creators choose our AI Song Generator

Value propositions

Oscillators
Waveform selector

4 Oscillator Waveforms

Sine for smooth, Square for harsh, Sawtooth for bright, Triangle for mellow tones.

Envelope
ADSR controls

ADSR Envelope

Shape Attack, Decay, Sustain, and Release for complete control over sound dynamics.

Effects
Effects controls

Filter & Effects Chain

Low-pass filter with resonance, plus reverb and delay effects for space and depth.

Playback
Virtual keyboard interface

Virtual Keyboard Playback

Test your patches instantly with the built-in virtual keyboard. Play notes across multiple octaves to hear your sound design in action.

Real-time
Real-time controls

Real-time Parameter Control

Adjust every parameter in real-time while playing notes. Hear immediate changes as you tweak oscillators, envelopes, and effects.

Web-based
Browser-based interface

No Installation Required

Browser-based synthesizer powered by Web Audio API. Start designing sounds immediately without downloads or plugins.

Sarah just generated a trackLo-fi Hip Hop

2 minutes ago

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Workflow overview

Follow these steps to move from idea to final mix

  1. 1
    Turn on the synth using the power button
  2. 2
    Select oscillator waveform: Sine, Square, Sawtooth, or Triangle
  3. 3
    Adjust ADSR envelope: Attack (fade in), Decay (initial drop), Sustain (hold level), Release (fade out)
  4. 4
    Set filter cutoff frequency (100-10000 Hz) and resonance (Q factor)
  5. 5
    Add reverb for space (0-100%)
  6. 6
    Add delay for echo effects (0-100%)
  7. 7
    Test your patch using the virtual keyboard or chord button
  8. 8
    Tweak parameters until you get the sound you want

What you can create with AI Song Generator

Inspiration for different creator workflows

Electronic Producers

Design bass, lead, and pad sounds for electronic music tracks.

Sound Designers

Create custom sound effects for games, videos, or multimedia projects.

Music Students

Learn synthesis basics: oscillators, envelopes, filters, and effects.

Experimenters

Explore sound design and discover new textures and timbres.

Frequently asked questions

Answers for licensing, quality, and workflow

What is ADSR?+
ADSR stands for Attack (fade in time), Decay (time to drop to sustain), Sustain (hold level), and Release (fade out time after note ends).
What's the difference between waveforms?+
Sine = pure/smooth, Square = hollow/bright, Sawtooth = harsh/buzzy, Triangle = soft/mellow. Each has a unique harmonic content.
Can I save my patches?+
Patch saving is planned for future updates. Write down your settings for now.
Can I use MIDI input?+
MIDI keyboard support is not yet available. Use the on-screen keyboard for now.
How does the filter work?+
The low-pass filter removes high frequencies above the cutoff point. Increase resonance to emphasize frequencies at the cutoff, creating sharper, more resonant sounds.
What's the difference between reverb and delay?+
Reverb creates ambient space by simulating room reflections. Delay produces distinct echo repetitions. Use both together for depth and dimension.
Can I record my synth output?+
Currently the synth doesn't include built-in recording. Use your operating system's audio recording tools or DAW software to capture the output.
Is this synthesizer polyphonic?+
The current version is monophonic (one note at a time). The chord button demonstrates polyphonic capability, which may be expanded in future updates.
What is resonance (Q)?+
Resonance (Q factor) boosts frequencies near the filter cutoff point. Higher resonance creates more pronounced peaks, adding character and emphasis to the filtered sound.
How do I create a bass sound?+
Start with sawtooth or square wave, set a low filter cutoff (200-500 Hz), short attack (0-10ms), quick decay, high sustain, and short release for punchy bass.
How do I make a pad sound?+
Use sine or triangle wave, slow attack (500-2000ms), moderate decay, high sustain, long release (1000-3000ms), and add reverb for ambient, evolving pads.
What browser works best?+
Modern browsers with Web Audio API support work best: Chrome, Firefox, Edge, and Safari. Chrome and Edge typically offer the best performance.
Can I use this for commercial music?+
Yes, sounds created with Synth Lab can be used in your commercial projects. The tool is free to use without licensing restrictions.
Why does my sound click or pop?+
Clicks occur with very short attack or release times. Increase attack to 5-10ms and release to 20-50ms to eliminate clicks at note start and end.
How do I create a lead sound?+
Try sawtooth wave, medium-high filter cutoff (2000-5000 Hz), moderate resonance, short attack, minimal decay, high sustain, and short release for cutting leads.

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