Aalto
Aalto is a semi-modular software synthesizer from Madrona Labs, built around a patchable interface.
What Aalto is
Aalto is a semi-modular software synthesizer from Madrona Labs, built around a patchable interface. Its complex oscillator provides FM, timbre, and waveshape controls and calculates sound dynamically rather than using static wavetables. Every voice includes a sequencer with independently controllable, patchable rate and offset. Voice modules also provide a lowpass gate with vactrol emulation and a patchable waveguide or delay whose feedback loop contains a waveshaper and peaking EQ. A state-variable filter offers simultaneous outputs that can be mixed. Aalto runs on macOS and Windows as VST, with AU available on Mac, and has no standalone app. A free trial is available, but demo mode plays a reminder about every minute and disables patch saving. The page lists macOS 10.9 or later with a 64-bit VST or AU host, and Windows 7, 8, or 10.
Good
- Patchable semi-modular interface
- Complex oscillator with FM controls
- Per-voice patchable sequencer
- VST and AU plug-ins
- Free trial available
Watch out
- No standalone app
- Demo reminder sounds about every minute
- Demo mode disables patch saving
- License pricing information differs
Who it suits
It suits electronic musicians seeking a patchable modular-style synthesizer plug-in on macOS or Windows. Users wanting standalone operation should note that no standalone app is listed.
Verdict
Aalto offers extensive patchable synthesis modules in a Mac and Windows plug-in. The trial allows evaluation, while demo limitations and the listed pricing details should be reviewed before purchase.
Plans and prices
From Aalto's own pricing page, checked 7 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Aalto license | $99, paid once | License for Mac OS and Windows · install on as many computers as desired; one license per computer for simultaneous use |
The facts
Each one read from Aalto's own pages, with the date it was checked.
What it does
- Demo limits
- In demo mode, a reminder sound plays about every minute and saving patches is disabled.checked 7 Oct 2026
- Filter
- Aalto uses a state-variable filter with mixable simultaneous outputs.checked 7 Oct 2026
- Host formats
- The Mac download is a VST/AU installer, while the Windows download is a VST installer.checked 7 Oct 2026
- License terms
- A license permits installation on any number of computers, but simultaneous use on multiple computers requires a license for each computer.checked 7 Oct 2026
- Manual
- The product page offers a manual of more than 50 pages, including an introduction to patching synthesis.checked 7 Oct 2026
- Oscillator
- Its complex oscillator has FM, timbre, and waveshape controls and uses dynamic calculation rather than static wavetables.checked 7 Oct 2026
- Privacy and payment security
- Madrona Labs says its site uses SSL to encrypt payment and confidential information and does not store financial or credit card information on its server.checked 7 Oct 2026
- Product
- Aalto is a semi-modular software synthesizer with a patchable interface.checked 7 Oct 2026
- Refunds and transfers
- Madrona Labs says it will refund purchases when unexpected problems are reported within 14 days, and direct licenses can be transferred for a service fee.checked 7 Oct 2026
- Sequencer
- Each voice has a built-in sequencer with patchable, independently controllable rate and offset.checked 7 Oct 2026
- Support
- Madrona Labs offers technical support by email and publishes Aalto tutorial videos covering patching and its modules.checked 7 Oct 2026
- System requirements
- The page lists macOS 10.9 or higher with a 64-bit VST or AU host, and Windows 7, 8, or 10.checked 7 Oct 2026
- Voice modules
- Each voice includes a lowpass gate with vactrol emulation and a patchable waveguide/delay with a waveshaper and peaking EQ in its feedback loop.checked 7 Oct 2026
The company
- Founded
- 2008checked 28 Sep 2026
- Maker
- Madrona Labs says it has made electronic musical instruments since 2008; the page does not state its headquarters or incorporation founding date.checked 7 Oct 2026
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