Comparison

Voice Synth vs TB DualVCF

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Voice Synth

Transform your voice live with a professional audio processor and music synthesizer. Create robotic voices, harmonies, and unique soundscapes using only your voice as an instrument. Save and share your creations, or integrate them into your existing audio setup.

Highlights
  • Live voice processing
  • Auto Pitch and Harmonizing
  • Vocoder effects
  • Speed-Shift Sampling
  • Soundscape creation
  • Audio Unit V3 integration
  • Save and share presets
Features
Read full description

Voice Synth is a professional live voice processor and music synthesizer played by your voice. With the vast set of integrated tools including Vocoders, Auto Pitch, Harmonizing Pitch Shift and Speed-Shift Sampling, you can • Sing in Tune like P-Tain & vocoded like Duft-Pank • Speak with Hollywood-quality Robot voices like 1978 Cylons • Play by Voice, no fingers needed: scream to play rock guitar, hum a church organ • Make professional funny voices: animal, evil, weird & much more • Create unique organic and rhythmic soundscapes • Sing multiple voices in harmony within any musical scale • Sample, speed shift and dress up your beatboxing to create the strangest rhythms inspiring new compositions • Live-pause and stroboscope your voice • Save and share your creations as presets and audio files • Use all of the above in your DAW and audio setup via Audio Units & MIDI On Voice Synth you will find no conventional ADSR, LFOs or filters. Even the keyboard is optional. Instead, Voice Synth uses the most expressive all-in-one tool you were born with: your voice! It's unique so be ready for a jump in voice creativity, sound design and rhythmic inspiration. To give you an easy start in this adventure, we included over 250 factory presets! Speak, sing, hum and scream live into the mic, and start exploring the unconventional controls: 24-band vintage analog modeling vocoders, Auto Pitch Tracking, live-voice-pause, speed-shift sampler, multiple voice harmony arranger, spectrum stroboscope, pitch and formant shifter, 24-band equalizer, classic FX as distortion/delay/chorus/reverb, and an extensive vocoder designer with oscilloscope. We included a manual for in-depth use. Musicians, DJs, sound designers, voice artists: Voice Synth is a must-have in your audio toolbox! Qneo voicesynth.com TECHNICAL SPECS • Engine 2x32 bit 44.1 kHz poly x24 • All effects fully integrated, simultaneous, live, realtime, low-latency • Background audio (iOS) • Manual • Audio Unit V3, instrument & effect, parameter automation • Audio routing • Midi • Repeater, anti-audio-feedback • Noise gate manual/auto • Keyboard 1.5-2.5 oct (midi 10), hold/mono/poly • Tapes to record/export your performance • 250+ factory presets, unlimited user presets, import/export INTEGRATED EFFECTS • 4 vintage analog modeling vocoders 24 bands 5th order filters (Natural Robot Breath Designer) • Auto Pitch, track/fix/double/inverse pitch • Multiple Voice Harmonizer, any musical scale (choirs, rich 70's vocoder sounds) • Speed-Shift Sampler ±800%, pause/zoom/loop/hold • Live-pause & strobo voice • Pitch Shifter 8 octaves (e.g. lion/gender/child/baby/duck) • Formant Shifter adapt spectrum ±1 octave (child to giant) • Registers 4 octaves (add brilliance, chords) • Arpeggiator pattern/gate/speed/grouping • Equalizer 24 bands, 10 presets (loudness, low-pass, telecom, etc) • Autogain/Compressor, Clip/Distortion, Stereo Panning, Delay, Chorus, Reverb • Slew rate: special vocoder reverb (plucked strings, wind, thunder, storms) • Mic thru and Vocoder mix to add-in your unprocessed voice (e.g. for beat-boxing) • Sync rhythmic effect timing DESIGNER VOCODER • Realtime oscilloscope • Sine/square/triangle/sawtooth, adjustable frequency/harmonics/clip/width/skew/slope • Noise white/voiced, adjustable filter/clipping • Mix additive/maximum/multiplicative synthesis • Test mode, design/play without voice

About

TB DualVCF

This app offers a dual analog filter plug-in for music production, providing a wide range of vintage filter models to shape sound. It features intuitive modulation and envelope followers for creative audio exploration, compatible with AUv3 hosts.

Highlights
  • Dual analog filter sections
  • Dozens of vintage filter models
  • Envelope followers
  • Intuitive modulation editor
  • AUv3 plug-in compatibility
  • Real-time audio processing
Read full description

Dual VCF - the ultimate dynamic filtering AUv3 plug-in! Dual VCF adds motion, shape, and colour. It produces evolving rhythmic movement and complex dynamic filter shapes. It contains dozens of analog filter models with that sought-after sound of the 70s, 80s and 90s. Combined with envelope followers and intuitive modulation editors, it provides almost infinite possibilities for creative aural exploration. Dual VCF features two filter sections, each supporting dozens of low-pass, high-pass and band-pass filter types. Every type is painstakenly modeled after analog filter types found in analog gear, analog synthesizers, and alike, including non-linear filter behavior. Dial in that characterstic 70s, 80s or 90s filter to add some analog flavor to your tracks! Each filter's cut-off frequency and resonance can be sequenced with an intuitive, free-running or beat-synced modulation editor. Seamlessly switch between sine, triangle, noise, or user-defined modulation waveforms. In addition, these parameters can also be modulated with the built-in envelope follower. The ToneBoosters DualVCF app captures the microphone (or external sound card) input and processes the signals in real time. To use it as a plug-in, use an AUv3-compatible host app such as Steinberg Cubasis, Apple Garageband, Audio Evolution Mobile Studio, Auria, AUM, or others. ToneBoosters DualVCF will appear in the list of Audio Unit extensions for effect plug-ins. How to use DualVCF as AUv3 plugin in a host program, start your favourite AUv3 host app (Steinberg Cubasis, Apple Garageband, Audio Evolution Mobile Studio, Auria, AUM, or others) and add TB DualVCF as Audio Unit insert effect to a track or output bus. See below on how to use Audio Units in various host apps. Key features: - The same professional sound as the acclaimed desktop version - Two analog filter sections with dozens of filter designs - Intuitive modulation editor for creative, rhythmic and evolving effects - Undo/redo, and A/B comparison - Color themes for the user interface - Max screen support in Garageband - Optimised for iPad and compatible with iPhone and iPod Touch What you should know: - Licenses acquired for this platform are not compatible with other platforms. - Audio Unit (AUv3) extensions require an iPad mini 2, iPad 4 or later models.

Screenshots

Voice Synth4 screens
TB DualVCF3 screens

Verdict

The call

The clearest difference is rating: TB DualVCF at 4.9 against Voice Synth's 4.1. TB DualVCF also leads on price ($4.99 vs $8.99) and review sentiment (80% vs 63%). Voice Synth's advantage is ratings volume (335 vs 18). On update cadence, ads, in-app purchases and monetization model there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Voice Synth costs $8.99 and TB DualVCF $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

TB DualVCF holds the better App Store score, 4.9 against 4.1. That said, the two scores are not equally well evidenced: Voice Synth has 335 ratings behind it against 18, so its average is the more settled of the two. Written reviews point the same way: 63% of Voice Synth's written reviews are positive against 80% of TB DualVCF's.

UpkeepUpdate frequency

Voice Synth ships an update every 6 weeks, TB DualVCF every 2 months. Both last shipped on October 24, 2026.

Scorecard5 real differences · 5 level
Voice Synth versus TB DualVCF: the parameters behind the verdict, then further details
ParameterVoice SynthTB DualVCF
Price$8.99$4.99 — better
Rating4.1 (335 ratings)4.9 (18 ratings) — better
Positive reviews62.7% of reviews80.0% of reviews — better
Number of ratings335 — better18
Update frequencyEvery 6 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, MaciPhone, iPad, iPod
Requires iOS16.613.0 — better
Further details — not scored
Size66 MB12 MB
Age rating4+4+
DeveloperQneoToneBoosters

Customer experience

Voice Synth

All ratings333 ratings
Positive80.2%
Neutral3.3%
Negative16.5%
Written reviews233 reviews
Positive62.7%
Neutral11.2%
Negative26.2%

TB DualVCF

All ratings18 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews15 reviews
Positive80.0%
Neutral6.7%
Negative13.3%

Bugs and requests

Voice Synth

Reported bugs

3 issues
  • Crashes and freezes
  • Audio sync issues
  • Unreliable live recording

Requested features

4 requests
  • Audiobus support
  • Longer recording duration
  • More preset options
  • Improved user interface and workflow

TB DualVCF

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Voice Synth

No in-app purchases

None

TB DualVCF

No in-app purchases

Questions

Is Voice Synth free?
Voice Synth costs $8.99, with no in-app purchases.
Is TB DualVCF free?
TB DualVCF costs $4.99, with no in-app purchases.
Which has better reviews, Voice Synth or TB DualVCF?
TB DualVCF is rated higher. Voice Synth averages 4.1 out of 5 from 335 ratings, while TB DualVCF averages 4.9 from 18 ratings.
Do Voice Synth or TB DualVCF have ads?
Neither Voice Synth nor TB DualVCF shows ads.
Which is updated more often, Voice Synth or TB DualVCF?
Voice Synth ships an update every 6 weeks, and TB DualVCF every 2 months. Most recently, Voice Synth was updated on October 24, 2026 and TB DualVCF on October 24, 2026.

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