Synth1

Windows · Mac

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Freedom report

Two barsScore 6.4

Free tierA free tier is on its own pricing page
Open codeNo open-source code on record
Runs widely2 of 6 device platforms
DocumentedPlans, terms and facts published

Synth1 is ranked #9 of 34 in software synthesizers on Freedom251. It runs on macOS, Windows. There is a free plan.

Synth1 plans and pricing

All plans

Freeware Free Freeware; VSTi/AU plugin daichilab.sakura.ne.jp · 4 Oct 2026

Compared on software synthesizers

Free plan: Yes
Synthesis engine: analog_modeling
Plugin formats: VSTi 2.4, AU version 2
Standalone app: No
Supported platforms: windows_macos
Included presets: 128 presets

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The record

Purpose: Synth1 is a software synthesizer intended for computer music production.
Commercial use: The maker says Synth1 may be used in commercial music without contacting the maker.
Synthesis: It has two oscillators and a sub-oscillator, with FM, ring modulation, sync, and a modulation envelope.
Sound shaping: It includes four filter types, distortion, two LFOs, an arpeggiator, tempo-synchronized delay, and stereo chorus/flanger.
Voices and presets: The maker lists 32-note polyphony and 128 preset sounds.
Windows support: The listed Windows release is VSTi 32/64-bit for Windows XP, Vista, 7, 8, and 10, and requires an x86/x64 CPU supporting SSE2.
Mac support: The listed Mac release is AU 64-bit for macOS 10.8 and later; the maker says Intel Macs were tested and M1 Macs were unconfirmed.
DAW compatibility: It works with DAWs that support VSTi on Windows or AU on Mac; the maker names GarageBand and REAPER as Mac examples.
Preset installation: The Mac version does not include the factory presets by default, so they must be downloaded separately.
Security note: The maker documents a GarageBand sandbox that changes where the zipbank folder is stored and links to instructions for a macOS security warning.
Support: The maker asks users to report bugs by email and says it will respond as much as possible.
Notable limitation: The English manual says Synth1 is not multitimbral.
Manual status: The English manual labels itself incomplete.
Price from: Free

Where it ranks on Freedom251

Best Software Synthesizers in 2026#9 of 34

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Sources

daichilab.sakura.ne.jp/softsynth/· checked 4 Oct 2026
daichilab.sakura.ne.jp/softsynth/synmanu/readmeeng.html· checked 4 Oct 2026