Free flanger plugin with eleven algorithms for through-zero flanging, doubling, and strange modulated echoes.
VST3supportedAUsupportedAAXsupportedCLAPnot supportedWINsupportedMACsupportedLNXnot supported
Checked September 2026
Valhalla Space Modulator is best for infinite flanging and doubling effects; Soundtoys Crystallizer is best for shimmering reverse-pitch textures. Valhalla Space Modulator starts at Free and Soundtoys Crystallizer at $149 one-time.

Free flanger plugin with eleven algorithms for through-zero flanging, doubling, and strange modulated echoes.

Soundtoys
Granular echo synthesizer combining pitch shifting and reversed echo, based on the Eventide H3000 Reverse Shift effect.
| Valhalla Space Modulator | Soundtoys Crystallizer | |
|---|---|---|
| Best for | infinite flanging and doubling effects | shimmering reverse-pitch textures |
| Starting price | Free | $149 one-time |
| Free version | Yes | No |
| Free trial | — | Yes |
| Formats | VST3, AU, AAX | VST, VST3, AU, AAX |
| OS | Windows, macOS | Windows, macOS |
| Key features | 11 flanging algorithms, Through-zero and barberpole flanging modes, Detuning and doubling effects, Native Intel/Apple Silicon builds, 64-bit VST2.4/VST3/AAX/AU | Reverse pitch-shift echo, Built-in Gate and Duck, Low and high-cut filters, MIDI sync and automation, 200+ presets |
| Developer | Valhalla DSP | Soundtoys |