The second best sounding piano app in the App Store (after "Colossus Piano")! Convince yourself by watching and listening to the demo video on our product website!

This app supports Bluetooth LE MIDI, as well as Audio Unit, Audiobus, Apple's "Inter-App Audio" System and the "JACK Audio Connection Kit" for audio & MIDI connections from/to other audio apps!

CMP Grand Piano is a high quality virtual piano sound module for your iPad, iPhone and iPod Touch. It is designed for professional usage on stage by connecting an external MIDI keyboard to the iPad / iPhone / iPod touch by using the Apple USB camera adapter or another adapter supported by Apple.¹ In comparison to "Colossus Piano" this app especially has a lower resource consumption and runs thus also on older devices.

CMP Grand Piano provides a very realistic sound by using a very large collection of audio samples of more than 1.7 GB (uncompressed) in size. Various articulations of each key of a real piano were sampled in full length and high quality to assemble this realistic sound. Real-time disk streaming is utilized to playback the respective audio samples with very low latency.

Sound Features:
- Two high quality base sounds ("Grand Piano" and "Jazz Piano") with more than 1.7 GB in size.
- Two additional sounds available as in-app purchase ("Concert Grand" and "Upright Pianino") with additional 1.6 GB and 1.1 GB respectively in size.
- Polyphony up to 140 stereo voices.²
- Configurable audio latency down to 5ms.
- Integrated effects with 17 presets.
- MIDI velocity response curve editor to fine tune the feeling of your MIDI keyboard, save them as presets if you use more than one keyboard.
- App can keep running in the background, so you can play piano while e.g. using Safari or another app to display scores or surfing the Internet.
- Hermode Tuning: Makes the sound more brilliant by controlling the pitch of the notes in multivoiced music to better frequency ratios than with fixed tuning. This dynamic tuning imitates the tuning behavior of well educated musicians with string and wind instruments and of singers in professional choirs.
- Provides Audio Unit v3 plugin version of this app, which allows it to be used as virtual instrument directly within third-party multi-track DAW apps (iOS 9.3).
- Audiobus support.
- Supports Apple's "Inter-App Audio" system for audio & MIDI streaming between other apps.
- Supports "JACK Audio Connection Kit" for audio & MIDI streaming between other apps (up to iOS 6.1.3).

MIDI Player / Recorder:
- Record, save and load your songs in standard MIDI file format.
- Unlimited amount of tracks.
- Unlimited recording and playback length.
- Open MIDI (.mid) files directly from other apps (i.e. from Safari, Mail).
- Download or upload MIDI files with iTunes.
- Load your favorite songs as MIDI files from the Internet, and watch at the virtual keyboard how to play it.
- Metronome.
- Use the "Tempo Zoom" dial knob to i.e. slow down playback at any time and learn your favorite songs more easily.

Note: This app requires quite some hardware resources from the device. In case there are problems with this app, please close apps in the background by double pressing the device's home button, the list of active apps appears on the bottom of the screen, tap and hold one app icon in the list, then press the respective app icon "minus" corner to quit those apps.

¹ For more information about supported adapters and MIDI keyboard devices, please visit our product website.

² Polyphony depends on the exact device model being used. You find a polyphony table on our product website.

Anti-Spy Commitment: We take your privacy very seriously. None of our apps contain so called „spy” behaviors and we committed ourself to a very high privacy standard. For more information about our privacy commitment, read our „Privacy Policy for Mobile Apps”.

What’s New

Version 1.13.24

• Switch directly between piano models by tapping on its icon from the piano models overview screen.
• Fixes potential crash which could happen under certain conditions during download of piano models.
• Fixes an issue of the Audio Unit Plug-in version which caused misbehaviors like random audio artifacts, noise and AU crashes under certain conditions.
• Fixes minor graphical issue.

Ratings and Reviews

Striker999 ,

By far the best iOS piano

I don't non ally write reviews but this app genuinely deserves recognition. As a professional musician, I've tried all the rest - GarageBand, Sampletank, iGrand etc - and this one blows them all away. The sound is superb but it's sheer playability and responsiveness is sublime. I have it on both an iPad Air and an iPhone 6 and it's great to know I have my piano with me wherever I go... Just need the camera connection kit and a USB MIDI lead and a nice 88 note weighted controller. I love this app! Please don't worry that the interface may not be as 'pretty' as other apps but this wins hands down on sound and response which is kind of the point of its purpose! For this money it's an absolute bargain too. You don't need a separate sound module anymore.

Septicus Rivet ,

CMP Piano

Absolutely blown away by the quality of these Pianos & the 2 more I purchased , far better samples than any stand alone high end Digital Piano I've tried ! Slight downside , it does not seem to have acoustic resonance available when using sustain pedal as do the aforementioned high end DPs & therefore Only reason not to award 5 stars. Be aware that this App is a Monster for memory. I purchased all 4 Pianos & it has used 4.6 gig !! & use an iPad 2/ iPhone 4S or later or Lack of Polyphony is a problem,( Also note it does'nt work on an iPhone using the Camera kit !! You have to buy an aftermarket Midi interface & they don't tell you that !!) I thought the Grand Piano in Garage band was good but this is on a different Planet , Fantastic !!!

Mr Bog ,

Best piano

The best sounding real piano emulation I have come across in the App Store. I expect more features will be added along the way.


Christian Schoenebeck d/b/a Crudebyte
1.7 GB
Requires iOS 5.1.1 or later. Compatible with iPhone, iPad and iPod touch.
Age Rating
Rated 4+
© 2012-2017 Crudebyte
In-App Purchases
  1. Concert Grand Piano £8.99
  2. Upright Pianino £4.99


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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