Apps Like Howl: A formant synthesizer for iPhone and iPad
Create and share vocal sounds
Create vocal effects using a vocoder with four parallel bandpass filters. Generate synthesized sounds with a simple sawtooth wave. Adjust pitch via a customizable keyboard. Apply effects like bitcrush, reverb, and vibrato.
Howl: A formant synthesizer screenshots
Ranked alternatives
Showing 1–20 of 1,000 ranked alternatives.


Voice Synth Modular
Qneo
Sing with vocoder effects
Allows users to process their into various effects. Apply vocoder, auto pitch, and harmonizing pitch shift. Adjust speed and sample sounds. Create robotic, animal, or comedic voices. Play musical instruments by without physical input.

Attack Drums
Waldorf Music GmbH
Create drum sounds and sequences
Create drum sounds and synthesize vocals using a 24-part sound engine. Use a pattern sequencer to arrange beats. Apply effects including a Phrase Vocoder that converts text to vocal-like sounds. Adjust vocal characteristics such as gender.

Reverse Singing
Calico Studio Inc.
Record audio, it, and transform
Record and audio to create humorous effects. Apply voice changer effects such as alien, chipmunk, ghost, demon, giant voice, vocoder, and autotune. Share reversed audio clips directly.

Klankwelle
Greg Okopal
Create and control synthesizers
Create and control up to 8 synthesizers simultaneously using a built-in keyboard or step sequencer. Connect external MIDI devices for input. Adjust sounds with a dynamic compressor and 10-band graphic equalizer.


Deep Synth : FM Synthesizer
Aleksandar Mlazev
Edit waves and modulate sounds
Create and customize synths with wave shape modulation and AUV3 support. Adjust envelopes, apply reverb and tremolo effects. Use a polyphonic keyboard with 5 octaves range. Connect MIDI keyboards via USB for velocity and pitch shift.



iVoxel
Harry Gohs
A vocoder and singing machine.
The app combines a voice-optimized synthesizer and a vocoder. It allows users to sing along to selected songs and record their voice for playback.

Popsicle FX
Kai Aras
Process audio with 24 effects
Apply multi-effects to audio with two stereo effect engines using 24 algorithms. Configure effects in series, parallel, or stereo split modes. Control parameters via an XY pad with recordable motion. Adjust settings for precise sound shaping.

NuRack Auv3 FX Processor
Limelight Software
Design effects with 80+ building blocks
Design custom audio effects using 80+ building blocks. Create complex routing in series or parallel. Build custom interfaces with Interface Builder. Control audio components for tailored processing.




Voice Tuner — AI Vocal Changer
Music Breath, OOO
Tune with effects and beats
Record and edit with pitch shifting and key adjustment. Add backing tracks and beats. Record video with real-time audio integration. Apply effects to mimic celebrity voices. Export final audio and video files.




voice bot
erik sigth
Record and play vocal loops in real
Use a microphone to create live or recorded loops with trigger modes via keyboard. Process sound with bit and sample crusher, delay, and flanger. Play using a 25-key dynamic keyboard or core MIDI.
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