# Zell ET – The Zell harpsichord — in equal temperament

> Digital harpsichord emulator with historical sample set for MIDI keyboards. (iPhone/iPad app by Markus Sigg.)

- Source: https://appshunter.io/ios/app/zell-et-the-zell-harpsichord/id1324507374 (this page in markdown: same URL + `.md`)
- Developer: [Markus Sigg](https://appshunter.io/developer/458880634)
- Category: Music
- Price: $9.00 (on sale, was $10.00)
- Rating: 5.00/5 from 5 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.5.6 · 561 MB
- Languages: German (Germany), American English
- Released: 2017-12-18
- Data updated: 2026-08-24
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/zell-et-the-zell-harpsichord/id1324507374/reviews.md

## What is Zell ET?

This app makes the equal temperament version of the Christian Zell 1737 harpsichord sample set available for playing with a MIDI keyboard connected to your iOS or macOS device. To learn about the instrument and the sample set, please visit http://samplesets.esmuc.info/ .

There is also a meantone temperament version and a bundle of both apps. If you purchases one of the apps, you can download the other one for free by bundle completion.

For more information about the app and the underlying Napo framework, please visit the support page http://polaron.de/Zell/ , the Napo documentation at http://polaron.de/Napo and in particular the user manual at http://polaron.de/Napo/manual .

## Key features

- Equal temperament harpsichord
- Christian Zell 1737 sample set
- MIDI keyboard support
- iOS and macOS compatible
- Meantone temperament version available
- Bundle option for both versions

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/zell-et-the-zell-harpsichord/id1324507374/reviews.md

### 5/5 — Der Hammer!!!!

*2020-03-01*

Der Klang ist einfach nur göttlich. Alle erdenklichen Einstellungen sind möglich und der Preis ist auch Super. Bin selbst Besitzer eines Spinetts das sich leider schon verstimmt wenn man es nur schief ankuckt. Endlich.. einfach nur spielen und genießen.

Danke für diese App!!! 7 Sterne!!!

## Frequently asked questions about Zell ET

### What is Zell ET?

Zell ET is a digital harpsichord emulator that uses the Christian Zell 1737 sample set in equal temperament. It allows you to play the instrument using a connected MIDI keyboard on iOS and macOS devices.

### Does Zell ET have ads?

No, Zell ET is ad-free. The app is a paid application and does not contain any advertisements.

### What devices does Zell ET support?

Zell ET is available for Mac, iPhone, iPad, and iPod. It requires a MIDI keyboard to be connected for playing.

### How much does Zell ET cost?

Zell ET is priced at $9.00. This is a one-time purchase for the application.

### Can I get the meantone version for free?

If you purchase either the equal temperament or the meantone version, you can download the other for free by completing the bundle in the app store.

### How often is Zell ET updated?

The latest version, 3.0, was released on November 15, 2023. The app has been updated periodically since its initial release on December 18, 2017.

### What is the age rating for Zell ET?

Zell ET has an age rating of 4+. This indicates it is suitable for users of all ages.

### Where can I find more information about the harpsichord and sample set?

You can learn more about the instrument and the Christian Zell 1737 sample set by visiting http://samplesets.esmuc.info/. Additional information about the app and its framework is available on the developer's support pages.

## Version history (last 5 releases)

### 3.1 — 2026-08-17

Upgraded from Napo 5.18 to Napo 5.18.1.

- Bugfix in convolution reverb (delayed late reflections).
- Pitch shifting range increased to ±200ç.
- Loading saved settings can now be done by a short-tap.
- Audiobus updated to version 3.0.15.1.

### 3.0 — 2023-11-15

Upgraded to Napo 5.18:

- New: User-adaptable font size for various text windows.
- New: Importing sample sets / patches from other places than the app's documents directory, including from iCloud Drive or USB drives.
- New: Combination bank table view shows date of last edit of each bank.
- New: Temperament editor allows numerical input of cent values.
- New: Console view: Visual discrimination of combination buttons from other buttons. Highlighting of last selected combination.
- New: Previous combination / next combination can optionally cycle within the current bank or switch to previous / next bank.
- New: Console view: New stepper window with large buttons for previous / next combination.
- New: Settings view: Buffer duration is set by number of frames instead of milliseconds (which depend on the sample rate). The actual buffer duration is still shown in milliseconds.
- New: A noise generator for preventing certain amplifiers from entering a sleep mode when there is no audio signal.
- New: Low-latency buffer sizes of 128 frames (2.9ms) and 64 frames (1.5ms). Do not use these on old devices like iPad mini 2, in particular in combination with convolution reverb.
- Changed: Smaller internal buffers for convolution reverb, to further reduce latency.
- Fixed: Quad convolution mode was broken.

### 2.5 — 2023-06-21

Upgraded to Napo 5.17.2. Fixes dysfunctional windchest volume controls and tremulants as well as breakdowns of the app when the user tries to configure the behaviour of MIDI controllers 64 and 66.

### 2.4 — 2023-05-17

Upgraded from Napo 5.13 to Napo 5.17, which brings temperaments functionality and other changes as detailed in https://polaron.de/Napo/history/index.html#5.17 .

### 2.3 — 2022-02-06

Upgraded to Napo 5.13.

- The sustain function of the screen keyboards can be turned off.
- Now supporting all currently known Launchpad models.
- Dry/wet control for the convolution reverb.
- Redesigned reverb control: AU Reverb, Convolution Reverb and the rendering of sample releases can now be controlled independently. You can play the sample releases and still add artificial reverb.
- Included metronome (long-tap the Console view icon).
- Optional coloured borders around the stop buttons. This makes the assignment of the stops to the manuals more apparent (long-tap the Console view icon).
- Fixes problems with iOS 15 prewarming.

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## More apps by Markus Sigg

- [EagleView - EagleData Viewer](https://appshunter.io/ios/app/eagleview-eagledata-viewer/id458880631)
- [StrandOrgan](https://appshunter.io/ios/app/strandorgan/id488756266)
- [MenzelOrgan](https://appshunter.io/ios/app/menzelorgan/id519045788)
- [OttOrgan](https://appshunter.io/ios/app/ottorgan/id519638462)
- [PiteaMini](https://appshunter.io/ios/app/piteamini/id545235579)
- [Jeux d'orgues](https://appshunter.io/ios/app/jeux-dorgues/id557697492)

All apps by Markus Sigg: https://appshunter.io/developer/458880634

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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 2026-08-24.*