Sine Machine

is an additive synthesizer

sine machine is an instrument that you play on your computer.

it looks like this:

It runs on macOS and Windows.
It’s a VST3, AU and CLAP instrument.
You can also run it as a Standalone app.

sine machine has over 10,000 time domain oscillators

(and over 20k lfos)

it is friendly *

*for an additive synth…
(in the worst case, fun and colorful?…)

it has features

20 voices of 511 time-domain oscillators
bulk-editing of per-harmonic ADSR, volume and pitch LFO
additive “reverb” made out of 1000 sine waves
additive “filters” including brickwall and gaussian band-pass
per-harmonic gaussian pitch noise (yum)
hackable plaintext presets (json format)
90 factory presets
0 knobs (don’t ask)

and lots of visualizers

(they help you understand wtf is going on)

Walkthroughs

Read Additive Synthesis Comic #1 — “What’s a harmonic?”

Read Additive Synthesis Comic #2 — It’s Timbre Time!

sine machine by @sudara is the best synth I have ever used

@imKelbin

got this a bit ago, just booted it up like 15 mins ago and this might be the coolest synth ive ever messed with what the fuck

@anem0s1

its blowing my mind already <3 about to hear this in all of my projects LOL <3

galen tipton aka recovery girl

loaded up the demo and two hours flew by, good going !

Diskette

Buy “Early Access”

Sine Machine has been in Early Access since Fall 2025. Buy now and you get access to Sine Machine, plus all future updates and features.

What’s included

MacOS AU, VST3, CLAP, Standalone (Apple Silicon and Intel)
Up to 3 installs per license (online activation required)
Windows VST3, CLAP, Standalone (Windows 10 and later)
Updates included

Pay what you want!

$60 USD

Buy Now

Pick a price that feels good to you.
All taxes are included.

Note that I don’t do sales
or bLaCk fRiDaY dEaLZ!!

Frequently asked questions

Have a different question? Hit me up at sudara@melatonin.dev

What are the minimum requirements?: Windows: Windows 10 and later
MacOS: Apple Silicon recommended.
Intel Macs are supported (macOS 11 and later).
What formats does Sine Machine come in?: VST3, AU and CLAP on macOS.
VST3 and CLAP on Windows.
Standalone on both.
No AAX?: We aren’t getting much demand for AAx. I recommend using Modalics’ amazing (and free!) PluginBuddy wrapper for people on Protools. If you want native AAX, do let me know.
Is Sine Machine CPU hungry?: It can be heavy on older machines (think older than 2019 Windows machines), in particular on bass notes with a high unison voices and all the bells and whistles. Otherwise it’s pretty chill?
Is there a trial?: Yup. 14 day trial. Download it here.
Do you offer offline activation?: It’s online activation only for now. I haven’t had much demand for offline activation, but if that’s something you need, please let me know.

added the ability to map partials to arbitrary frequencies. instead of 500 harmonics, this is 500 sine waves tuned to the same pitch, spread apart a bit, going through various per-harmonic pitch and volume modulation pic.twitter.com/VJSuWnj6bx
— sudara (@sudara) August 20, 2025

last feature before private beta…
— sudara (@sudara) February 24, 2025

ok here we go, bending harmonics from a normal sawtooth to the set of fundamental frequencies contained in a 12tet minor 6/9 chord pic.twitter.com/D213OyE9Vi
— sudara (@sudara) February 27, 2023

sine machine was built (and re-built) by Sudara over a period of 5 years

(i’m a musician and indie dev who also does some open source )