Speak Unit vs QuaDelay
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Speak Unit
This audio extension synthesizes speech for music production. Input up to twelve phrases, each triggered by a specific musical note, to add robotic vocals to your compositions. It's ideal for creating unique vocal effects in music software.
- Speech synthesis audio extension
- Phrase input up to twelve entries
- Note-triggered phrase playback
- Voice selection
- Standalone app for auditioning
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Speak Unit is a speech synthesiser audio extension for use in Garageband and other compatible music software. You enter up to twelve phrases that are each triggered by a unique note. Ideal if you need robotic vocal for your musical compositions, or any other creative uses. To use - Add the Speak Unit audio extension instrument to a track in your music software - Select a note using the up and down buttons on the Speak Unit's chest. - Enter a phrase - Choose a voice - Press the save button to store the phrase in the Speak Unit ready for synthesising. - Press the speak button if you wish to audition the phrase. - Play or sequence that note to play the phrase in your composition. The stand alone app can be used to speak the phrases triggered by a row of note buttons.
QuaDelay
This audio effect plugin creates unique stereo delay soundscapes using four independent delay lines. It offers advanced control over delay times, regeneration, modulation, and filtering for ambient and experimental audio textures. It can be used standalone or within compatible host applications.
- Four independent stereo delay lines
- Adjustable delay times and ratios
- Variable regeneration (feedback)
- Stereo modulation effect
- Low-pass filter for repeats
- Integrated reverb effect
- Standalone and AUv3 compatible
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QuaDelay Delay-Scaper (AUv3) QuaDelay is an audio effect plugin that can run standalone, or in any AU compatible host application such as Logic or GarageBand. Overview QuaDelay is a stereo delay effect that uses four independent delay lines to create interesting, and sometimes mesmerising "delay-scapes". QuaDelay is not your typical ping-pong delay, so if you're looking for tempo-sync'd quarter note triplets and dotted eighths, that's not really what QuaDelay is about. If on the other hand, you're interested in creating lush and ambient delay-based effects, this might just be the delay for you! Parameters Active - Toggles the effect On or Off. Note that when you set the effect to Off, you will still hear the delay repeats, but your input signal is no longer fed into the delay processing. This is a similar idea to the "trails" feature in many delay effects units and pedals. Delay - Sets the base delay time between 100ms and 8 seconds. Other delays will be heard at different times depending on the Ratios setting. Ratios - Changes how the other three delay line times are calculated. The 2:3:4 setting is probably the most obviously rhythmic, as it's based on the formula 1-(1/x) which produces the ratios of 50, 67 and 75%. These ratios are applied to the base delay time, so for a base delay time of 1000ms, one delay will occur after 1000ms and the others at 500ms, 667ms and 750ms. The Gold and Silver Ratios calculations are based on Prime numbers and the Golden and Silver Ratio in Mathematics. These calculations are the QuaDelay "secret sauce" ! Regen - Sets the regeneration or feedback of the delay repeats up to 100% "endless" repeats. Note that at high Regen levels, the sound will appear to degrade in quality and become "washed-out" or "murky". This is intentional, and an attempt to capture the sound of analog delays with limited fidelity. Compression and limiting are also applied internally to prevent excessive build-up, which can also result in a "crunchy" sound at extreme settings as the repeats are squashed each time they're layered on top of each other. Again, this tends to be a sonic characteristic of analog and tape-based delays. Mod - Applies a variable amount of stereo modulation to the delayed sound. LPF - Sets the cutoff frequency of a lowpass filter applied to the delay repeats. Reduce the LPF control for a darker echo sound. Dry - Sets how much of the dry / incoming signal is added to the output stage, and can be muted entirely if desired. Wet - Sets the overall level of the generated delay / effect. Reverb - Applies a large-sounding stereo-tastic reverb to the combined Dry and Wet output. Adding Reverb helps "smear" the delay repeats, creating ambient washes of sounds. By setting the Wet level to zero, you can use QuaDelay as a simple reverb effect. If the name sounds familiar, QuaDelay is an improved version of the QUADELAY module developed for Voltage Modular by Waverley Instruments. For more info and support please visit: www.waverley-instruments.com/robjackson
Screenshots
Verdict
Speak Unit and QuaDelay both sit at 4.8 stars, but that hides the real split: 67% of Speak Unit's written reviews are positive against 0% of QuaDelay's. Speak Unit also leads on price ($0.99 vs $1.99). QuaDelay's advantage is update cadence (every 3 days vs every 52 months). On rating, ratings volume, ads and in-app purchases 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
Speak Unit costs $0.99 and QuaDelay $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 4.8 for Speak Unit against 4.7 for QuaDelay. Both are backed by a comparable volume of ratings — 8 and 6 respectively. Written reviews are what separate them: 67% of Speak Unit's written reviews are positive against 0% of QuaDelay's.
Speak Unit ships an update every 52 months, QuaDelay every 3 days. The most recent releases landed on November 2, 2026 and October 30, 2026 respectively.
| Parameter | Speak Unit | QuaDelay |
|---|---|---|
| Price | $0.99 — better | $1.99 |
| Rating | 4.8 (8 ratings) — better | 4.7 (6 ratings) |
| Positive reviews | 66.7% of reviews — better | 0.0% of reviews |
| Number of ratings | 8 — better | 6 |
| Update frequency | Every 52 months | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 12.0 | 12.0 |
| Further details — not scored | ||
| Size | 153 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | Rick Peacock | Rob Jackson |
Customer experience
Speak Unit
QuaDelay
In-app purchases
Speak Unit
No in-app purchases
QuaDelay
No in-app purchases
Questions
Is Speak Unit free?
Is QuaDelay free?
Which has better reviews, Speak Unit or QuaDelay?
Do Speak Unit or QuaDelay have ads?
Which is updated more often, Speak Unit or QuaDelay?
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