# iDP/4 — Control your effect processor

> MIDI editor for Ensoniq DP/4 effects processor, controlling parameters and presets. (iPhone/iPad app by DELTA SEVEN Korlatolt Felelossegu Tarsasag.)

- Source: https://appshunter.io/ios/app/idp4/id1526481455 (this page in markdown: same URL + `.md`)
- Developer: [DELTA SEVEN Korlatolt Felelossegu Tarsasag](https://appshunter.io/developer/1355331300)
- Category: Music, Utilities, Music
- Price: Free with in-app purchases
- Rating: 5.00/5 from 2 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 9.3 · 31 MB
- Languages: English
- Released: 2020-12-14
- Data updated: 2026-06-08
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/idp4/id1526481455/reviews.md

## What is iDP/4?

iDP/4 is a MIDI editor for the Ensoniq DP/4 effects processor.
The app itself doesn't make any sound but controls the parameters of the hardware unit.

You are able to control the followings:
- 43 effect algorithms and their individual settings
- Effect routing between the processing blocks
- Load any of the factory presets
- Save the current presets to local storage
- Access the saved presets in the iOS Files app

IMPORTANT NOTE: you should upgrade your unit to the latest firmware (1.15) for the best experience.

The app is free to try and to make sure your MIDI setup is working correctly. An in-app purchase is provided to access the full functionality.

## Key features

- MIDI editor for Ensoniq DP/4
- Control effect algorithms and settings
- Manage effect routing
- Load factory presets
- Save and access custom presets
- Integrates with iOS Files app

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Full Functionality | $30.99 | one-time |


## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/idp4/id1526481455/reviews.md

### 1/5 — Before buying things you didnt know

*2022-06-10*

I Bought this App for my Ensoniq Dp4 .
Please be aware that the App wil not be Into your Apple account the App doesnt appear to my Apple account and I didnt not receive any license after my purchase. I think its working app but I think the way they selling it its not legal and not fair . 
You will  not receive anything I made some complains about it but they were ingnoring what I was saying. They  are selling you something you will never have into your hands . Any decent app or plugins you will receive the app and license on ilok or elicenser . but here nothing i wonder if my computer break  what am I going to do. because i got no license in possession . Thanks for reading

### 5/5 — Fantastic app

*2022-05-24*

It’s amazing having full control of something built in the early 90s , wirelessly with the CME WIDI master. Can’t imagine the ensoniq engineers ever imagined this. It be great if there was a feature for creating automation tracks. Worth every penny if you have a DP4 or iPad. Also tested on my M1 MacBook Air and it works great.

## Frequently asked questions about iDP/4

### What is iDP/4?

iDP/4 is a MIDI editor designed to control the parameters of the Ensoniq DP/4 hardware effects processor. It allows you to adjust effect algorithms, routing, and presets.

### Does iDP/4 make sound?

No, the iDP/4 app itself does not produce any sound. Its sole purpose is to send MIDI commands to the Ensoniq DP/4 hardware unit to control its parameters.

### What can I control with iDP/4?

You can control 43 effect algorithms and their settings, effect routing between processing blocks, load factory presets, and save your current presets locally.

### Is iDP/4 free to use?

iDP/4 is free to try, allowing you to ensure your MIDI setup is working correctly. Full functionality requires an in-app purchase.

### What firmware version is recommended for the Ensoniq DP/4?

For the best experience with iDP/4, it is important to upgrade your Ensoniq DP/4 unit to the latest firmware version, which is 1.15.

### On which devices can I use iDP/4?

iDP/4 is currently supported on iPad devices.

### How often is iDP/4 updated?

The latest version of iDP/4 is 1.0.35, which was last updated on April 14, 2021. This indicates a relatively infrequent update cycle.

### What is the user rating for iDP/4?

iDP/4 has a perfect rating of 5.0 stars based on 2 user reviews, suggesting a very positive user sentiment among its current user base.

## Version history (last 4 releases)

### 1.0.35 — 2021-04-14

This update adds four 2-dimensional touch controls to the app assignable to the 8 real-time controls provided by the DP/4.

### 1.0.33 — 2021-04-09

This update fixes bugs and crashes:
- Bluetooth permission dialog added for newer iOS versions
- Fixed Config parameter settings
- Fixed a crash on startup when no data was loaded

Thanks to our dedicated users for the feedback and support.

### 1.0.1 — 2020-12-17

Bugfixes and performance improvements

### 1.0 — 2020-12-14

No release notes.

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## More apps by DELTA SEVEN Korlatolt Felelossegu Tarsasag

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All apps by DELTA SEVEN Korlatolt Felelossegu Tarsasag: https://appshunter.io/developer/1355331300

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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 2026-06-08.*