Free three-band upward/downward multiband compressor originally from Ableton's Multiband Dynamics preset.
VST3supportedAUsupportedAAXsupportedCLAPnot supportedWINsupportedMACsupportedLNXnot supported
Checked September 2026
OTT vs DC1A (2026)
OTT is best for aggressive multiband upward/downward compression; DC1A is best for fast, simple compression with analog-style character. OTT starts at Free and DC1A at Free.
Free two-knob character compressor for effortless gentle-to-heavy leveling.
VST3supportedAUsupportedAAXsupportedCLAPnot supportedWINsupportedMACsupportedLNXnot supported
| OTT | DC1A | |
|---|---|---|
| Best for | aggressive multiband upward/downward compression | fast, simple compression with analog-style character |
| Starting price | Free | Free |
| Free version | Yes | Yes |
| Free trial | — | — |
| Formats | VST3, AU, AAX | VST3, AU, AAX |
| OS | Windows, macOS | Windows, macOS |
| Key features | 3-band upward and downward compression, Depth control for wet/dry blend, Resizable, redesigned GUI, Apple Silicon native and Pro Tools AAX support, VST2/VST3/AU/AAX formats | Two-control (input/output) design, Negative ratio and overcompression modes, Parallel compression option, Dual Mono switch for independent stereo channel compression, DEEP mode high-pass filter to reduce bass pumping |
| Developer | Xfer Records | Klanghelm |
Questions people ask
OTT starts at Free; DC1A starts at Free.
3-band upward and downward compression, Depth control for wet/dry blend, Resizable, redesigned GUI, Apple Silicon native and Pro Tools AAX support, VST2/VST3/AU/AAX formats.
Two-control (input/output) design, Negative ratio and overcompression modes, Parallel compression option, Dual Mono switch for independent stereo channel compression, DEEP mode high-pass filter to reduce bass pumping.