WaveFolder vs Midi Echo AU
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
WaveFolder
This audio effect app adds harmonics to sound by folding waveforms. It's ideal for enhancing synth leads, transforming drum loops, and creating ambient drones. Customize folding thresholds and modulation for unique sound design.
- Wave folding distortion
- Harmonic addition
- Adjustable folding thresholds
- Modulation of folding amount and symmetry
- Tempo-based or free-running modulators
- Built-in wave shaper
- Color themes
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WaveFolder is a simple Wave Folding Audio Unit Extension. Wave Folding is an interesting distortion effect that adds harmonics to the original signal by folding the waveform back on itself when it exceeds a clipping threshold. WaveFolder is great for adding spice to monophonic synth leads and rhythmic, tempo based modulations can turn drum loops into totally new entities, while long, slow, free running modulations are perfect for dirty ambient drones. WaveFolder lets you set the folding thresholds and modulate the folding amount and symmetry with tempo based or free running modulators. WaveFolder also includes a wave shaper to add even more interest. There is also a short built-in manual and a selection of colour themes.
Midi Echo AU
This app creates repeating MIDI note effects, similar to audio echoes but for digital music signals. It allows for independent control of note-on and note-off messages, offering extensive customization for musical expression.
- Selectable echo types (fixed, ping pong, taper)
- Adjustable number of echoes (0-20)
- MIDI velocity reduction for quieter echoes
- Define pitch interval for successive echoes
- Tempo sync or mSec delay time
- Set MIDI channel for echoes
- Disable individual echoes
- MIDI thru control
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AUv3 Midi Fx - Midi Echo online manual here: http:/amssoftware.org/manual/MidiEchoManual.pdf Note : AUv3 midi apps need a compatible host (AUM,Audiobus 3, Cubasis, BM3 etc). So what is a midi echo? It is similar to the audio echo effect where copies of the original audio are repeated at regular time intervals but with some form of change (e.g. quieter). But unlike audio, midi is digital in nature (low resolution 8 bit mostly) and focused around the midi note on & off message used to control synths etc. This app acts on midi note-on independently from the note-off but when the note – off appears it echoes the release of the note-on in the same way the note-on was echoed (pitch interval etc) even if the UI controls have changed. UI Controls exist to allow you to: * Select the type of echo (fixed, ping pong, taper) * Vary the number of echoes (from 0 to 20) * Make echoes quieter by reducing the midi velocity * Define the pitch interval (semitone) of all successive echoes * Select the delay time between echoes either tempo sync or in mSec * Define the delay type (fixed, tempo, random 50, random 20) * Set the midi channel of echoes (1-16) so that other synths can select the echo only * Disable individual echoes - to allow you to play chords with a small or 0 delay * Set Midi thru to keep/remove the original note messages * Panic button to quickly turn off all notes * Setup control automation as all controls are AU Parameters
Screenshots
Verdict
The clearest difference is rating: WaveFolder at 4.6 against Midi Echo AU's 3.5. WaveFolder also leads on review sentiment (75% vs 50%). Midi Echo AU's advantage is price ($1.99 vs $4.99) and update cadence (every 6 weeks vs every 3 months). On ratings volume, 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
WaveFolder costs $4.99 and Midi Echo AU $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
WaveFolder holds the better App Store score, 4.6 against 3.5. Both are backed by a comparable volume of ratings — 9 and 8 respectively. Written reviews point the same way: 75% of WaveFolder's written reviews are positive against 50% of Midi Echo AU's.
WaveFolder ships an update every 3 months, Midi Echo AU every 6 weeks. The most recent releases landed on October 19, 2026 and October 15, 2026 respectively.
| Parameter | WaveFolder | Midi Echo AU |
|---|---|---|
| Price | $4.99 | $1.99 — better |
| Rating | 4.6 (9 ratings) — better | 3.5 (8 ratings) |
| Positive reviews | 75.0% of reviews — better | 50.0% of reviews |
| Number of ratings | 9 — better | 8 |
| Update frequency | Every 3 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 11.0 — better |
| Further details — not scored | ||
| Size | 4 MB | 13 MB |
| Age rating | 4+ | 4+ |
| Developer | Living Memory Software | anthony saunders |
Customer experience
WaveFolder
Midi Echo AU
In-app purchases
WaveFolder
No in-app purchases
Midi Echo AU
No in-app purchases
