A guide for anyone who cares about the sound of their web/FM/DAB+ transmissions, with an eye on simplicity, stability, and value for money.
Why talk about VST plugins for radio?
In radio, you don’t need a constellation of plugins to achieve a professional sound. The main goals are:
Stable volume between music, voices, and commercials
Intelligible voice, without harsh sibilance or annoying resonances
Consistent sound between different tracks and sources
Mono compatibility, for listening in the car, with cheap headphones, or simple devices
Often, a well-balanced chain with light processing sounds better than one overloaded with effects and aggressive compressors. Personally, I work with TDR Molotok as my main compressor, and in this article I’ll show you how to build an effective radio chain starting from this free plugin.
How RadioBOSS handles VST plugins
RadioBOSS is one of the most used software for radio automation (web, FM, and DAB+). It handles VST plugins in a simple way, but with some important technical rules:
Plugins are managed from the FX tab of the master output.
To add a plugin, click the + button → Add new DSP and choose the VST from the list.
Plugins are enabled and configured with the Configure button.
RadioBOSS requires 32-bit VST plugins, even if you run on Windows 64-bit. This is a critical point: if you install only the 64-bit version, the plugin won’t appear.
Winamp DSP plugins also work (like Stereo Tool in Winamp form) by copying them into
<RadioBOSS_Dir>\Plugins\Winamp.
Before installing any VST, make sure to download the 32-bit version.
TDR Molotok: my compressor for radio
Among all the plugins I’ve tried, TDR Molotok is the one I use most often for radio. It’s free, recent, and has a sound that adapts very well to the broadcast context.
What is TDR Molotok
Made by Tokyo Dawn Records (TDR), the same company behind TDR Nova, TDR Limiter 6, and other plugins appreciated in the broadcast world.
A characterful compression plugin, inspired by vintage Soviet compressors.
Available for free for Windows and macOS.
Includes:
Different modes (Beta, Classic, Fast, Vintage) to change tone and response
Zero-latency mode for use where latency is critical
Resizable GUI, A/B, bypass, preset manager, copy/paste parameters between instances
Why I use it for radio
Glue between voice and music
Molotok “sticks” program elements together well: music and speakers no longer sound like separate sources, but a single coherent flow.Characterful but controllable sound
At low compression (little gain reduction) it’s almost transparent.
When you push it more, it adds character, grain, and a sense of “vintage warmth” without overdoing it.
Ideal on voice and mix
Works very well on:Voice (DJ, speakers, interviews)
Program bus/mix (the entire radio signal)
Drum loops, stereo household material, already-mixed broadcast content.
Free
For a radio station, especially small or in development, having a compressor of this quality at zero cost is an important advantage.
Basic settings I recommend
Every radio is different, but these are the settings I start from:
On voice (DJ, speakers)
Mode: Beta (softer, great for natural “glue”)
Ratio: 2:1 – 3:1
Attack: medium (not too fast, to avoid killing the voice’s attack)
Release: medium-slow, musical
Gain Reduction: 1–3 dB on average voice, with peaks up to 4–5 dB max
Goal: keep the voice under control without it sounding “squashed”.
On program bus (full radio mix)
Mode: Beta preferred
Ratio: low (1.5:1 – 2:1)
Gain Reduction: 1–2 dB on average
Goal: give cohesion to the program, not crush it.
In practice, Molotok for me is the “engine” of the chain: I keep compression light but constant, to create a compact, professional sound.
Recommended chain for RadioBOSS
Here’s my practical chain, designed to be simple but effective. You can use it as-is and then refine it according to your radio.
Basic chain for radio
Light corrective EQ
Cut sub-bass (<30–40 Hz) to clean the signal.
Small corrections on annoying resonances.
Recommended plugin: TDR Nova (free dynamic EQ), or a simple EQ included in RadioBOSS if you prefer.
Main compressor
Here you put TDR Molotok.
It’s the heart of the chain: it adds body, stability, and cohesion.
De-esser (if needed)
For voices with strong “s”, “z” and sibilant consonants.
Free plugins: TDR Slick EQ (with dedicated curves) or dedicated free de-essers.
Final limiter / clipper
To keep peaks under control and avoid distortion on the stream.
Recommended free plugin: TDR Limiter 6 (very precise for radio).
Paid options: Pro-L 2, Ozone Maximizer, etc.
Stereo management (optional)
If you have material that’s too narrow (mono loaded as stereo), you can add slight widening.
Caution: in radio, mono compatibility is essential, don’t overdo it.
In summary, my preferred chain in RadioBOSS is:
Light EQ → TDR Molotok → Limiter
If needed, I add a de-esser before the limiter for voice.
Free plugins useful for radio
Here’s a table with the free plugins I recommend for a solid radio chain:
Tokyo Dawn Records is today a reference for anyone seeking professional quality at zero cost or with more powerful “GE” paid versions.
Paid plugins to mention (for completeness)
If your radio has budget and you want an “all-in-one” processor, there is:
Stereo Tool (Thimeo)
Complete broadcast processor:
Multiband compression
AGC (automatic gain control)
EQ, clipper, saturation
Stereo management and optimization for FM/streaming
Used as VST or as Winamp DSP in RadioBOSS.
It’s a standard for many FM and internet radio stations.
Prices (excl. VAT):
Basic: ~€39 → €319 total
FM Standard: ~€169 → €449 total
FM Professional: ~€419 → €699 total
For FM/streaming radio, a separate license is needed per instance (each PC/server that acts as broadcast processor).
However, it’s not essential: a well-tuned chain with TDR Molotok, Nova, and Limiter 6 can come very close to the result, especially for internet radio and small/medium DAB+.
Common mistakes to avoid
Some common mistakes seen in beginner radio stations:
Too many plugins in a row
Increase noise, artifacts, and latency.
Often make the sound worse instead of better.
Excessive compression
Too much gain reduction (10+ dB constantly) kills dynamics and fatigues the listener.
In radio, light constant compression is better than total squashing.
Ignoring mono compatibility
Many people listen to radio in the car or on simple devices.
Always check how the signal sounds in mono.
Using 64-bit VST with RadioBOSS
RadioBOSS requires 32-bit plugins.
If the plugin doesn’t appear in the list, you probably installed only the wrong version.
How to install TDR Molotok in RadioBOSS
A brief step-by-step guide:
Download TDR Molotok
Go to Tokyo Dawn Records’ website and download the official installer.
Make sure to install the 32-bit version.
Install the plugin
Run the installer and follow the standard procedure.
If asked for the VST folder, use the one where you already have other 32-bit plugins.
Add the plugin to RadioBOSS
Open RadioBOSS.
Go to the FX tab of the master output.
Click + → Add new DSP.
Select TDR Molotok from the list of VST plugins.
If the plugin doesn’t appear, check that you:
Installed the 32-bit version
Pointed to the correct VST plugin folder in RadioBOSS options.
Configure the plugin
Click Configure to open Molotok’s GUI.
Set:
Mode: Beta
Ratio: 2:1 – 3:1 (voice) or 1.5:1 – 2:1 (bus)
Medium attack and release
Gain Reduction: 1–3 dB for voice, 1–2 dB for mix.
Listen and refine
Enable/disable the plugin with Bypass and compare.
Adjust until voice and music sound “more united”, without losing naturalness.
Conclusion
In radio, success doesn’t depend on the most expensive plugins, but on how you use them. A simple chain, well-tuned, and with no excessive compression often sounds better than a complex one full of effects.
I always start from TDR Molotok: with light compression, in Beta mode, I get a more compact and “radio-like” sound without overdoing it. Combined with a light EQ and a precise limiter, it already gives a professional result for internet radio, FM, and DAB+.
Download the free version, try the chain I described in RadioBOSS, and adjust according to your radio. Listen, compare in mono and stereo, and find the point where music and voice sound together, not separate.
If you already have reference plugins (like Molotok for me), start from there and build around: it’s the fastest way to create a consistent, recognizable sound for your station.