# SploshBox — Reverb / Sustainer AudioUnit

> Vintage-style digital reverb and sustain audio effect plugin. (iPhone/iPad app by Rob Jackson.)

- Source: https://appshunter.io/ios/app/sploshbox/id6744564269 (this page in markdown: same URL + `.md`)
- Developer: [Rob Jackson](https://appshunter.io/developer/1072346998)
- Category: Music, Entertainment
- Price: $1.99
- Rating: 5.00/5 from 3 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 12 MB
- Released: 2025-04-14
- Data updated: 2026-09-06
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/sploshbox/id6744564269/reviews.md

## What is SploshBox?

SploshBox Reverb / Sustainer (AUv3)

SploshBox is an audio effect plugin that can run standalone, or in any AU compatible host application such as Logic or GarageBand.

Overview

SploshBox is vintage-flavoured digital reverb that also allows you to "freeze" the reverb tail for infinite sustain effects. The early generation of hardware digital reverbs had a slightly grainy and "unnatural" quality to them due to limited CPU and RAM. SploshBox has similar tonal characteristics, but while being kind to your CPU, it also features up to one minute of reverb decay time! Or, infinity when you engage freeze mode...

Parameters

Active - Toggles the effect On or Off. When SploshBox is turned Off, any reverb will continue to decay, similar to "trails mode" found in many effects pedals.

Delay - Sets a pre-delay time before the incoming audio is passed on to the reverb DSP. This can be used creatively so that the initial attack / transients of a sound are preserved and not "smeared" by the reverb tail for example.

Decay - Sets the overall decay time for the reverb tail. This is calculated as the time for a 0dB impulse to decay to -60dB. Typically, unless the incoming signal is 0dB, the actual decay time may appear a little shorter before it hits -60dB.

Spread - Sets the stereo width of the generated reverb from totally mono, to very stereo-tastic!

LPF - Sets the cutoff frequency of a lowpass filter on the generated reverb. Reduce this parameter to make the reverb effect warmer / softer.

Mix - Adjusts the balance between the dry incoming audio, and the wet generated reverb, from completely dry to 100% wet.

Freeze - Engages the reverb freeze effect so that whatever is in the reverb buffers will sustain continuously. By toggling Freeze in and out, very interesting creative and drone effects can be achieved, especially when assigning the parameter to a MIDI controller. Please note that when Freeze is On, reverb will not be applied to your dry input signal - it's as if the reverb is frozen in that moment. SploshBox does not store "frozen" audio between sessions, so if Freeze mode is On when restoring a session, you won't hear any reverb.


If the name sounds familiar, SploshBox is a version of the SPLOSHBOX module developed for Voltage Modular by Waverley Instruments. For more info and support please visit:

www.waverley-instruments.com/robjackson

## Key features

- Vintage-flavoured digital reverb
- Infinite sustain "freeze" effect
- Adjustable reverb decay time
- Stereo width control
- Low-pass filter for reverb tone
- Mix dry and wet signals

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/sploshbox/id6744564269/reviews.md

### 5/5 — Sustain Tails

*2025-09-13*

Such a useful utility to freeze tones you’re into

### 5/5 — Simple yet elegant

*2025-06-01*

I really enjoy this effect. The dev making it universal is really nice to see too! I like how simple it is, it does what it sets out to do. No complaints!

## Frequently asked questions about SploshBox

### What is SploshBox?

SploshBox is a vintage-flavoured digital reverb and sustain audio effect plugin. It can run standalone or within AU compatible hosts like Logic and GarageBand, offering unique "freeze" capabilities for infinite sustain.

### How much does SploshBox cost?

SploshBox is a paid application, available for $1.99. This one-time purchase grants you access to all its features without any additional in-app purchases or subscriptions.

### Does SploshBox have ads?

No, SploshBox does not contain advertisements. As a paid application, it provides an uninterrupted user experience focused solely on its audio processing capabilities.

### What devices is SploshBox compatible with?

SploshBox is designed for Apple devices, including Mac, iPhone, iPad, and iPod. It utilizes the AUv3 audio unit format, ensuring compatibility with supported music production applications on these platforms.

### How often is SploshBox updated?

SploshBox was last updated on April 17, 2025, with version 1.0.5. While specific update frequency isn't detailed, this indicates ongoing development and support from the developer.

### What is the "freeze" function in SploshBox?

The "freeze" function in SploshBox sustains the current reverb tail indefinitely, creating drone-like effects. Toggling this feature allows for creative sound design, though it does not apply reverb to the dry input signal while active.

### Can SploshBox be used offline?

Yes, SploshBox can be used offline as an audio effect plugin within compatible host applications. Its functionality does not rely on an internet connection for processing.

### What is the age rating for SploshBox?

SploshBox has an age rating of 4+. This indicates it is suitable for users of all ages, with no content restrictions.

## Version history (last 3 releases)

### 1.0.5 — 2025-04-17

This is hopefully a better fix for anyone still getting BAD SIGNAL! errors in AUM, and similar / related errors in other hosts / DAWs. Sorry about that - it was a really hard bug to reproduce, and a bit of a stinker to fix.

### 1.0.3 — 2025-04-16

Added some extra validation around naughty numbers ending up in output buffers. If you were seeing BAD SIGNAL! in AUM, hopefully this update will fix that. 

If it doesn't, please do let me know about your extra naughty numbers!

### 1.0.1 — 2025-04-15

No release notes.

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## More apps by Rob Jackson

- [moodscaper](https://appshunter.io/ios/app/moodscaper/id1088768073)
- [pianoscaper](https://appshunter.io/ios/app/pianoscaper/id1177444402)
- [moodscaper SE](https://appshunter.io/ios/app/moodscaper-se/id1247452905)
- [touchscaper](https://appshunter.io/ios/app/touchscaper/id1250344299)
- [guitarscaper](https://appshunter.io/ios/app/guitarscaper/id1316544251)
- [moodscaper LE](https://appshunter.io/ios/app/moodscaper-le/id1435065372)

All apps by Rob Jackson: https://appshunter.io/developer/1072346998

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-06.*