# Zell MT – The Zell harpsichord — in meantone temperament

> MIDI harpsichord app with Christian Zell 1737 meantone temperament samples. (iPhone/iPad app by Markus Sigg.)

- Source: https://appshunter.io/ios/app/zell-mt-the-zell-harpsichord/id1324508792 (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 4 App Store ratings · 3 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.5.6 · 453 MB
- Languages: German (Germany), American English
- Released: 2017-12-21
- Data updated: 2026-08-24
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/zell-mt-the-zell-harpsichord/id1324508792/reviews.md

## What is Zell MT?

This app makes the meantone temperament version of the Christian Zell 1737 harpsichord sampleset available for playing with a MIDI keyboard connected to your iPad or iPhone. To learn about the instrument and the sampleset, please visit http://samplesets.esmuc.info/ .

There is also an equal 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

- Meantone temperament harpsichord samples
- Christian Zell 1737 instrument
- MIDI keyboard support
- iPad and iPhone compatibility
- Equal temperament version available
- Bundle offer for both versions

## Recent user reviews (3 of 3)

All indexed reviews: https://appshunter.io/ios/app/zell-mt-the-zell-harpsichord/id1324508792/reviews.md

### 5/5 — So real

*2023-11-22*

I’ve never played a real harpsichord. Was tempted to try building from a kit. But this suffices brilliantly. Well done.

### 5/5 — Seductive

*2022-11-01*

My favorite Harpsichord. Thank you so much for creating this app.

### 4/5 — A great instrument!

*2018-01-01*

Eagerly anticipated and here it is! A harpsichord app as marvellous as the organ apps by the same creator. Thoughtful design and great sound samples make this very good value indeed.

## Frequently asked questions about Zell MT

### What is Zell MT?

Zell MT is a music application that provides the Christian Zell 1737 harpsichord sampleset in meantone temperament for playing via a connected MIDI keyboard on iPad and iPhone.

### Does Zell MT have ads?

No, Zell MT does not contain advertisements. It is a paid application.

### What devices does Zell MT support?

Zell MT is compatible with Mac, iPhone, iPad, and iPod devices.

### How much does Zell MT cost?

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

### Can I get the equal temperament version for free?

Yes, if you purchase the meantone temperament version (Zell MT), you can download the equal temperament version for free through a bundle completion offer.

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

Zell MT has an age rating of 4+, making it suitable for a wide range of users.

### When was Zell MT last updated?

The latest version of Zell MT was released on November 15, 2023, indicating regular updates and maintenance.

### What is meantone temperament?

Meantone temperament is a tuning system used for musical instruments, and Zell MT specifically offers the Christian Zell 1737 harpsichord in this historical tuning.

## 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 changes as detailed in https://polaron.de/Napo/history/index.html#5.17 .

However, Zell MT does not support temperaments other than the original meantone one. If you would like to experiment with temperaments, then please use the companion app, Zell ET, for this.

### 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

## Related topics

[harpsichord](https://appshunter.io/ios/topics/harpsichord) · [harpsichord 3d](https://appshunter.io/ios/topics/harpsichord-3d) · [lukas zeller](https://appshunter.io/ios/topics/lukas-zeller)

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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.*