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A gift from The Lake.


Altar is a FREE, open-source guitar amplifier with a feature-set you would only expect to find in a $200 product.


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Latest version: 0.3b (Beta)

Features

Two Amplifiers

Altar comes with a glassy clean channel, and a modern high-gain channel for a wide variety of tones.

NAM Support

Load your existing NAM (Neural Amp Modeler) files by switching to Altar's third amp channel.

Modular DSP

Drag the amp, cab and FX modules around to re-order them. Right click to bypass.

Cab Designer

Create your own professional-sounding IRs with an intuitive designer tool. Share your cabs with friends or even sell them.

Pitch Shifting

Two-octave realtime pitch shifting with semitone-snapping and a sub-octave layer blend, all fully automatable.

FX Suite

Multiple Overdrive modes, Circuit-Bending, Reverb, Forward, Reverse and Glitch Delays, Chorus and a Ringmod.

Mixing Tools

Mix faster with the Low-frequency palm mute control (Chug). Upper-mid pick attack expansion (Pick), a pre-set Whistle filter and built-in Lofi effect.

Pre & Post Process

Process the DI and final tone with industry-grade channel strips for the ultimate encapsulated tone.

No Stone Unturned

Up to 8x Oversampling, built-in Tuner, Click, and an Output Limiter complete the package for your new amplifier.


Altar is licensed under GPL-3, click the button below to access the Github repository.



Feedback and bug reports go here. Please include workstation and steps to reproduce issue.


Support Our Work

Support Development

Monthly
One-Time

This amp is free because I want to provide access to everyone, not lock it behind a paywall.

If you find it useful (and you're in a position to support financially), even a small donation directly helps me keep building and improving tools like this.

I have plans for many great plugins, and with your help I can get them in the hands of musicians everywhere who otherwise can't afford to fulfil their creative endeavours.

Thank you. 💘