Two versions available: the button above downloads the Windows installer. Mac users need the macOS version instead — download TDR Kotelnikov for Mac here.
TDR Kotelnikov, by Tokyo Dawn Labs, is a free wideband dynamics processor built for transparent, high-precision compression and limiting — the kind of tool you’d reach for on a mix bus or master rather than for an obvious effect. It comes from the same lineage as TDR Feedback Compressor and shares family traits with TDR Nova, but instead of emulating a classic hardware unit, Kotelnikov was designed from scratch as a “proudly digital” processor.
Features
- 64-bit floating-point, multi-rate processing for high-precision gain reduction.
- Independent release controls for peak and RMS content, based on a “crest factor” detection scheme.
- Oversampled signal path that stays bit-transparent at 0dB gain reduction.
- Flexible sidechain high-pass filter and advanced stereo-linking options built for bus compression.
- Delta preview mode to A/B the difference between the compressed and original signal.
- Latency-compensated parallel bypass, so processing keeps running even when bypassed.
It’s built to control dynamics by large amounts while keeping the original tone and punch of the material intact, which is why it’s commonly used on mix buses and masters rather than individual tracks.
Compatibility
Free, with an optional paid upgrade (Gentleman’s Edition) adding extra workflow features. Available in VST / VST3 on Windows, and VST / VST3 / AU / AAX on macOS (64-bit), for Windows 7+ and macOS 10.9+.
Sources :
tokyodawn.net: http://www.tokyodawn.net/tdr-kotelnikov/
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This is maybe one of the most transparent and useful compressor plugins out there, and it’s free! If you’re working on acoustic music and need to squeeze piano, acoustic guitar, vocals, or even the mix bus to reduce the overall dynamic range without a bunch of pumping, this just works! Surprised it’s not a 5 out of 5 stars. Learn about Crest Factor, and this is an excellent compressor plug.
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