Lowtone
by ToneBoosters · Synth · Bass synth
Not rated yet
Lowtone is a ToneBoosters bass synthesizer that uses loudness-domain harmonic synthesis to keep bass level consistent across the keyboard.
It has three oscillators with over 30 waveforms, a noise source, a 20-type filter, effects and a randomizer that learns from your patches, for $39.74 (€35).
Best for: Bass, Sound Design. Genres: Electronic & EDM, Hip-Hop & Trap, Pop, R&B & Soul.
Keywords: basses, randomize, sound design, FM.
What it does
Lowtone is a synth built only for bass. ToneBoosters uses what it calls loudness-domain harmonic synthesis, adjusting individual harmonics so notes sound equally loud from low to high, for "production-ready bass sounds".
- Loudness-domain synthesis: harmonics are adjusted to compensate for loudness changes across the keyboard, so basslines stay even without extra compression.
- Oscillators: three VCOs with more than 30 waveform algorithms, up to 12 unison voices, continuous PWM, FM and hard sync, plus a voltage-controlled noise source.
- Filter: non-linear VCF with 20 types, including dual, triple and quadruple resonance filters.
- Modulation: an ADSR envelope with onset delay and two extended LFOs with beat and key sync, onset delay and a set cycle count.
- Gate editor: for building rhythmic modulation patterns quickly.
- Effects: reverb, chorus, delay and a peak limiter.
- Presets and randomizer: a browser with sorting, search and categories, and a smart randomizer that learns from your own patches.
The current version is 2.1.8 (July 2026).
Source: ToneBoosters product page
When to use it
Lowtone is the better pick when you want a cheap, dedicated bass synth whose notes stay even in level across the range. Compared with Future Audio Workshop SubLab XL it is synthesis-only, with no sample layers, but costs much less. Unlike Spectrasonics Trilian it doesn't do sampled electric or acoustic bass at all. Against all-round synths such as Serum 2 or Vital it has far fewer sound-design options, but its focused layout and loudness-domain oscillators get to a usable bass faster.
- Best for: synth basslines, funk and pop bass, rhythmic gated bass, and sub layers.
- Genres: electronic, hip-hop, pop and R&B.
- Look elsewhere if: you want sampled electric or acoustic bass (Trilian), or a synth that also covers leads and pads (Vital or Serum 2).
Where to buy
- ToneBoosters: $39.74 (Listed at €35; converted at €1 = $1.1355 (ECB rate, 29 Sep 2026))
Tutorials and reviews
- ToneBoosters Lowtone (No talking)
- ToneBoosters Lowtone Bass Synth - Tutorial and Demo
- TB Lowtone Synth - So Much More Than Just a Bass Synth - Full Tutorial & Patch Design
- TB Lowtone - Bass synthesizer by ToneBoosters
- Toneboosters Lowtone Bass Synthesizer demo 2
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