AddSynth for Windows

Name: AddSynth
Rating: 3.3 (10 reviews)
Author: Jeff Chandler

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Editors’ Review

Download.com staffFebruary 26, 2026

AddSynth is a real-time additive synthesizer software. It allows you to craft unique sounds with extensive control over its 16 oscillators, envelopes, and LFOs.

Top Recommended Alternative

Dirk's Metronome

Free

Pros
- Real-time additive synthesis engine
- Includes 16 oscillators, envelopes, and LFOs
- Responds to MIDI input messages
- Supports keyboard input for MIDI-less operation
Cons
- Limited to additive synthesis techniques

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Full Specifications

GENERAL

Release: November 24, 2003

Latest update: February 26, 2026

Version: 1.0

OPERATING SYSTEMS

Platform: Windows

Operating System

Windows 2000
Windows 10
Windows 98
Windows XP
Windows ME

Additional Requirements: Windows 98/Me/2000/XP, DirectX 9.0 drivers

POPULARITY

Total Downloads: 61,675

Downloads Last Week: 6

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Last Updated

User Reviews

3.3/5

10 User Votes

Did not install correctly.
RidakissMay 26, 2012
Pros
None......
Cons
Didn't install correctly.
Summary
Its probably so old that it won't work on newer computers.. Just my guess.
Gives online music a fuller sound
TechdickSeptember 30, 2010
Pros
I liked the program enougth to purchase it early in my 30 day trial period and I don't do that very often.I would like for the effe
Cons
I would like for the effects to be continuously variable rather than the three steps that currently exist.This is a good program
Summary
This is a good program designed to enhance your listening experence by expanding and adding fullness to your music. Updated on Sep 30, 2010My review is incorrect. I thought I was writting a review for AstoundSound. Not knowing how to delete my review I can only suggest you ignore my review for AddSynth.
Now just an AD Site with links to lots of ads. No Product to download.
scvblwxqNovember 30, 2007
Pros
Cons
No Product
Summary
Wasn't what I was looking for, and had adware.
Sir GalahadAugust 24, 2004
Pros
Cons
Summary
I quickly realized, while trying to find composing software, that this was only made to accompany midi software by creating instrument types which one can load into it. It'd be okay for those who would use such a thing if it didn't come with adware. In the installation report it says something to the effect of: "Legal Disclaimer: Addsynth may install ad software on your computer, and occasionally make use of your internet connection" Ugh. No.
incomplete
June 4, 2004
Pros
Cons
Summary
Lacks play button and help file. I've been using Windows since 1991 and I couldn't get it to work.
Fun right away
March 6, 2004
Pros
Cons
Summary
I don't know anything about music, or synthesizers, but this software is fun to play with at first opening. I think experienced musical types will love this.
hepp
November 29, 2003
Pros
Cons
Summary
goooooooood
November 28, 2003
Pros
Cons
Summary
November 28, 2003
Pros
Cons
Summary

Developer’s Description

By Jeff Chandler

Create and play your own unique synthesizer with this simple software instrument.

Real-time additive synthesizer that contains 16 oscillators, 16 amplitude envelopes, and 16 lfos. This synthesizer is written in C++, using MFC and DirectSound. AddSynth responds to note-on, note-off, and program-change messges. If no MIDI input device is connected, AddSynth will respond to keyboard input.

AddSynth for Windows

Editors’ Review

Top Recommended Alternative

Dirk's Metronome

Pros

Cons