Sound Radix is giving away Radical1 Solo, a multifunctional monophonic additive synthesizer that covers everything from drawing harmonics by hand to writing your own DSP code, completely free of charge.
In this article we cover the giveaway details and take a closer look at what Radical1 Solo can do.
1. What Is Sound Radix Radical1 Solo?
Sample used in the video | Splice Sounds: RKU_JC_beat_loop_duwop_168, Kit_6_FW_Drum_Fill_Loop_Fm_168
Radical1 Solo is a free monophonic additive synthesizer that runs the exact same additive synthesis engine as the paid Radical1. The oscillators, modulation system, filters and effects are shared with Radical1, but the whole instrument is narrowed down to a single voice and a single layer, which makes it a great fit for basses, leads and sequences. Even with that mono focus, the sound design scope stays wide thanks to features such as Direct Spectrum Drawing, which lets you draw harmonics directly, and Formula Blocks, which let you write DSP code inside the plugin. Sounds you create here stay compatible with Radical1, so your work carries over if you ever move up to the full version.
Key Features
- Patent-pending additive engine that generates tens of thousands of oscillators in real time with minimal CPU load
- Clean, accurate frequency response all the way up to the Nyquist frequency with no aliasing and no oversampling
- Morphing Fluid Oscillators that glide smoothly between timbres and continuously reshape the harmonic structure
- Direct Spectrum Drawing generator for sculpting harmonics by drawing them in directly
- Spectral Sample Resynthesis that turns recorded material into a controllable additive structure
- Spectral shaping tools, harmonic modifiers and a real-time spectral display
- Sample-accurate ultra-fast envelopes for sharp transients and delicate expression
- A “What You See Is What You Hear” workflow where every layer, module, block and modulation path is visualized
- Starred parameters that pin your most-used controls to the top level
- Built-in MIDI effect rack with arpeggiator, sequencing and note shaping
- Time-Domain Audio FX rack covering filtering, dynamics, spatial and creative processing
- Spectral Block FX for harmonic-domain bending and spectral transformation
- Formula Blocks that let you write DSP code directly inside the plugin
- MPE support for expressive control
2. How to Download and Install Radical1 Solo
Create a Sound Radix account and head to the Downloads page, where you can grab and install the Mac or Windows installer listed under Radical1 Solo.
Sound Radix Muteomatic Is Also Free
Alongside Radical1 Solo, Sound Radix is also giving away Muteomatic, a utility plugin for talkback microphones. It automatically mutes and unmutes your talkback or listen mic channel based on your DAW transport state: the channel opens while playback is stopped and mutes as soon as you play or record. The current mic state is shown in a large, easy-to-read display so everyone in the studio can tell whether the channel is open, and clicking the main display lets you talk or mute temporarily. It also works well for muting long effect tails such as reverb, or vocal monitor effects, while the DAW is stopped.
Both Radical1 Solo and Muteomatic are available at no cost right now, so grab them while the offer lasts.

