Guitar Amp Simulation using WebAudio

Author: Michel Buffa (@micbuffa), GUI with the help of Mahdi Wartani, big thanks to LePou for giving me so many hints too.

You may visit the GitHub repo.

You need Google Chrome, FireFox Nightly or Opera (the app should support soon other browsers) + don't forget to set the default input in your OS preferences. If you plugged a guitar in, then press the pulsing button in the middle of the Amp to activate it. Otherwise you can try the amp with the audio player on the left, press play and use the preset menu or the buttons/sliders.

The preamp is close to the one from the famous Marshall JCM 800 guitar amp.

Advanced settings

Press play to preview presets

Choose a demo sample:

Use sound wave

Freq

Gain

Type

Preamp internals

lowShelf1 Freq 720 Hz

lowShelf1 Gain -6 dB

lowShelf2 Freq 320 Hz

lowShelf2 Gain -5 dB

Stage 1 Gain 1

HighPass1 freq 6 Hz

HighPass1 Q 0.7071

lowShelf3 Freq 720 Hz

lowShelf3 Gain -6 dB

Stage 2 Gain 1

DRIVE : distorsion levels

K1 4

K2 4

Cabinet Simulator (Dry/Wet) 2

Cabinet impulse:

Clean / Disto :

Input Gain

Output Gain

Presets :

Transfer function and distorded signal example...

Operation	Component	Description
Click	Switch/Param	toggle / activate the switch or focus the param
Drag	Knob/Slider	up/right to increase value / down/left to decrease value
Shift+Drag	Knob/Slider	fine control
Ctrl+Click/Command+Click	Knob/Slider/Switch	set to default value
Edit with Keyboard	Param	edit the value directly
MouseWheel	Knob/Slider	rotate upward to increase value / downward to decrease value
Shift+MouseWheel	Knob/Slider	fine control