Clavitudo
Music
Free · In‑App Purchases
Building on the Napo framework, Clavitudo is a container app that allows you to play various supported instrumental sample sets by MIDI keyboards connected to your iOS or macOS device.
The instruments have to be installed by the user. For more information, please consult the app support page https://polaron.de/Clavitudo/ . For a quick start, read https://polaron.de/Clavitudo/Manual/Quickstart/ .
The standard Apple Terms of Use (EULA, see https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ ) apply to this app.
more Option for yearly subscription, minor bugfixes, internal development.
1.9 3d ago
This is a maintenance release using new Napo 6.11 functionality to give the Friesach adapter the ability to play the missing D note of the pedal Posaune 16'.
1.8 Apr 7
- New: Selecting combinations via MIDI.
- New: Folding of sections in settings editors.
- Fixed: Delayed reflections in the convolution reverb.
- Fixed: Faulty handling of MIDI Program Change messages.
- Fixed: Issues with recent iPadOS versions recycling invalid sessions when the iPad is used in the mode "Full-Screen Apps".
1.7 Mar 28
- Adapter for Piotr Grabowski's marvellous Giubiasco sample set.
- Gallery view (per instrument). Images can be imported from the sample set (if there are any included) or manually placed in the instrument's Gallery folder.
- Log view now has its own window and does not anymore open automatically.
- Notes Off button.
- User can configure which of the buttons Audio Recorder, Metronome, Notes Off should be shown at the left border.
- Zimbelstern support (for suitable sample sets).
- Combinations don't anymore act on the blower state.
- User can configure whether stop buttons should be displayed immediately or only when the corresponding samples are loaded and the rank is ready to play.
1.6 Mar 7
This is a bugfix release. It cares for the problem of stuck notes occurring when window scenes change while keys of a MIDI keyboard are pressed.
1.5 Feb 11
- Instrument volume window.
- Monophonic bass.
- Transposition functionality.
- New adapters: Jeux d'orgues 2 Mini, Bureå Church Mini, Piteå School of Music Mini. These are well suited for mobile devices with small screens.
1.4 Jan 28
There is now an adapter for Pere Casulleras' meantone sample set of the Christian Zell 1737 harpsichord.
On macOS and iPadOS 26+, users can choose whether screen keyboards are shown in the instrument view or in an own window.
In the hardware settings, MIDI keyboards can be defined by manually specifying the channel number instead of channel detection by pressing a key.
All MIDI actions induce an info display when executed.
Bugfixes.
1.2 12/15/2025
Bugfix: The installation function of the Gerhard Grenzing sample set adapter was broken in version 1.0.
Bugfix: It was not possible to change the volume of the keys and knobs noises (for instruments that support these noises).
Bugfix: MIDI actions for changing instrument and section volumes did not work.
Other, minor bugfixes.
New: Dynamic display of the reverb sections in the instrument settings view.
New: MIDI action for temperament selection.
1.1 11/29/2025
Adds support for two more sample sets: Bureâ Church of Lars Palo and Friesach of Piotr Grabowski.
By making use of a table view, selecting an instrument for installing is now easier, and the same holds for defining MIDI actions.
The Audiobus support was dropped because we did not manage to get it working well.
Beginning with this version, on devices running iOS 17 / iPad OS 17 / macOS 14 and later, a subscription is needed to play all instruments with their full note range. Without subscription, the Jeux d'orgues 2 instrument is fully operational, while the other instruments are limited to a note range of three octaves on these devices. Read more about this at the Clavitudo support page.
1.0 11/20/2025
Updated to Napo 6.2.
- If the users wishes so, new recordings etc. are saved to iCloud drive instead of locally.
- Various things can be controlled by MIDI.
- Short octave functionality for all instruments.
- Pitch range is enlarged to ±200¢, with fine-tuning by single cents.
- Audiobus updated to v3.0.15.1.
- Instrument adapter for Lars Palo's Bureå Funeral Chapel sample set.
0.9 07/08/2025
Updated the download URLs for the Aragonese Procession Organ and the Grenzing Organ (ESMUC) sample sets. These can now be downloaded directly from the respective Clavitudo instrument page.
0.8.2 01/09/2025
- Bugfix concerning the checkmarks in the temperament views.
- The Marcussen/Moerdijk sample set can now be downloaded from the Clavitudo page.
- There is now an adapter for the Kalvträsk Church sample set of Lars Palo.
0.8.1 09/27/2024
This version adds adapters for four more sample sets: Eule / Szombathely dry and wet of Augustine's Virtual Organs, Jeux d'orgues 2 of Joseph Basquin, and Piteå School of Music of Lars Palo.
Futhermore the app is upgraded to Napo 6.1: Enhanced scenes support (macOS, iPadOS), Audiobus support (iOS / iPadOS), and many more improvements that you can read about at the app support page (section Development History) and the Napo version history.
0.8 09/23/2024
This is the first instance of Clavitudo that builds on Napo 6 and supports multiple instruments (there are adapters for four sample sets, for now). Large parts of the app framework have been rewritten. Users of previous versions need to redo the configuration. For more information about the changes, please consult the development log at https://polaron.de/Clavitudo/History/ .
0.7 07/08/2024
Upgraded to Napo 5.20:
- Icon representation of instruments in the root view.
- Internal preparations for the multi-instrument-version.
0.6 01/17/2024
Option for yearly subscription, minor bugfixes, internal development.
more Version 1.9 3d ago
Data Not Collected The developer does not collect any data from this app.