Speak Unit vs AulDelay
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.
AulDelay
This audio effect plugin offers a vintage-inspired stereo delay with extensive customization. Achieve classic retro tones through built-in filtering, modulation, and compression, perfect for creative sound design and live looping.
- Vintage-inspired delay effect
- Stereo delay with L:R ratio control
- Delay time modulation
- Internal highpass and lowpass filtering
- Compression and limiting for retro sound
- Up to 8 seconds delay time
- Standalone or AUv3 host compatible
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AulDelay Vintage Echo Plugin (AUv3) AulDelay is an audio effect plugin that can run standalone, or in any AU compatible host application such as Logic or GarageBand. Overview AulDelay is a vintage-inspired delay effect for those times you don't want a perfectly pristine digital delay sound. A combination of internal highpass and lowpass filtering, delay time modulation, and internal compression / limiting, results in delay tones with a classic retro vibe. However, unlike the vintage units that inspired it, AulDelay is a stereo effect and has a maximum delay time of 8 seconds for old-school live-looping adventures! 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 delay time between 10ms and 8 seconds. Very short delay times used with modulation and regen can be used to create chorus and flange effects. Longer times can be fun for "Frippertronics" style looping. L : R - Sets the ratio of the left and right delay times. For example, for a delay time of 500ms and a ratio of 1:1, you will hear a delay repeat in both channels every 500ms, just like a standard delay effect. For a ratio of 3:4, the right channel will repeat every 500ms and the left repeats every 375ms, or 333ms for a ratio of 2:3. The ratios 3:4 and 2:3 produce nice rhythmical stereo effects. Mod - Applies Med(ium) or Deep stereo modulation to the delayed sound. Set Mod to Off for no modulation. 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. Tone - Sets the overall tonal colour of the delay repeats from Dark to Bright, or somewhere Warm in-between. An internal LPF is applied "destructively" to the delay repeats, so at the Dark or Warm settings, the repeats will progressively loose higher frequencies. A fixed HPF is also used internally to remove very low frequencies. Both filters, which are applied to the delayed signal only, have been tweaked to emulate the tones associated with vintage analog delays. Mix - Sets the level of the delayed signal. Please note the dry / input signal is always present. If the name sounds familiar, AulDelay is an improved version of the AULDELAY module developed for Voltage Modular by Waverley Instruments. The name is inspired by the Scots world "auld" (as in the song Auld Lang Syne), meaning, old, and of course AU, i.e. Audio Units. For more info and support please visit: www.waverley-instruments.com/robjackson
Screenshots
Verdict
The clearest difference is review sentiment: AulDelay at 100% against Speak Unit's 67%. AulDelay also leads on update cadence (every 3 days vs every 52 months) and rating (5.0 vs 4.8). Speak Unit's advantage is price ($0.99 vs $1.99). 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
Speak Unit costs $0.99 and AulDelay $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
AulDelay holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 8 and 5 respectively. Written reviews point the same way: 67% of Speak Unit's written reviews are positive against 100% of AulDelay's.
Speak Unit ships an update every 52 months, AulDelay every 3 days. The most recent releases landed on October 21, 2026 and October 24, 2026 respectively.
| Parameter | Speak Unit | AulDelay |
|---|---|---|
| Price | $0.99 — better | $1.99 |
| Rating | 4.8 (8 ratings) | 5.0 (5 ratings) — better |
| Positive reviews | 66.7% of reviews | 100.0% of reviews — better |
| Number of ratings | 8 — better | 5 |
| 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
AulDelay
In-app purchases
Speak Unit
No in-app purchases
AulDelay
No in-app purchases
Questions
Is Speak Unit free?
Is AulDelay free?
Which has better reviews, Speak Unit or AulDelay?
Do Speak Unit or AulDelay have ads?
Which is updated more often, Speak Unit or AulDelay?
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