# CMP Grand Piano — Virtual Piano Sound App

> High-quality virtual grand piano sound module for iOS with MIDI support. (iPhone/iPad app by Christian Schoenebeck d/b/a Crudebyte.)

- Source: https://appshunter.io/ios/app/cmp-grand-piano/id566874816 (this page in markdown: same URL + `.md`)
- Developer: [Christian Schoenebeck d/b/a Crudebyte](https://appshunter.io/developer/428367741)
- Category: Music, Education
- Price: $14.99 with in-app purchases
- Rating: 4.20/5 from 15 App Store ratings · 87 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 1.7 GB
- Languages: American English
- Released: 2012-11-02
- Data updated: 2026-09-06
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/cmp-grand-piano/id566874816/reviews.md

## What is CMP Grand Piano?

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 and Inter-App Audio!

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 much 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 several hundred voices.²
- Configurable audio latency down to 1ms.
- 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 and higher).
- 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.
- Export and share your song as MIDI file or as audio (.wav, .m4a) file.
- Unlimited amount of tracks.
- Unlimited recording and playback length.
- Open MIDI (.mid) files directly from other apps (i.e. from Safari, Mail).
- 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.

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.

Privacy: 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”.

## Key features

- Realistic grand piano sound with 1.7GB+ samples
- Bluetooth LE MIDI, Audio Unit, and Inter-App Audio support
- Connect external MIDI keyboards
- Low resource consumption for older devices
- MIDI player/recorder with export options
- Hermode Tuning for brilliant sound
- Configurable audio latency

## Pricing and in-app purchases

Base price: $14.99.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Concert Grand Piano | $8.99 | one-time |
| Upright Pianino | $4.99 | one-time |


## Recent user reviews (10 of 87)

All indexed reviews: https://appshunter.io/ios/app/cmp-grand-piano/id566874816/reviews.md

### 2/5 — Fix this

*2026-08-27*

They asked you 11 years ago to implement a “release”. This and the VERY BAD dynamics renders this unplayable. Find a piano player and tweak this until they tell you that they can play without effort, can express subtle dynamics, not just the two extremes.

### 5/5 — Fantastic

*2025-07-07, version 2.1*

The white grand piano is fantastic, its just so realistic, even the velocity feels great, I'm stil loving iSymphonic too 🤗  UPDATE:  i started out with this App on an iPhone 5 x86 and i still love it on my iPhone 7 plus with iOS 15.8.4… please maintain support as long as you technically can  🤗

### 5/5 — 久しぶりのバージョンアップ

*2024-11-21*

久しぶりのバージョンアップ
素晴らしいピアノ音源なので
これからもガンガン使っていく予定
ソフトの更新これからもよろしくお願いします🙇

### 5/5 — This is my favourite pianoforte.

*2022-11-23*

So there are a few pianos and electric pianos on iOS/iPadOS, and I have some of them.  Not the most expensive out there, but I have listened to some renditions on the most expensive.  On first hearing this CMP piano downloaded, it seemed unremarkable.  However, adding the necessary reverb and the tiniest sliver of echo/delay really livened it up.  I always have to add some of Apple’s GarageBand initial compressor, because it has a slider to amp-up the dB on it, on most Audio Units.  

The standard limiter in your DAW, then at the end of the FX chain, the EQ to add ‘air’ and remove the lowest rumble of sub-60Hz, and it’s really very good.  

Right at the beginning of course, there’s the ability to alter the velocity curve in the app, which helps because my 61-key MIDI controller/keyboard is average in that department.  

These are my ways of setting-up this pianoforte to succeed.  Once you have this sort of essential respect given to the overall tone and ambience your instrument is playing in, it is amazing how much the underlying sound qualities come through.

I moved on to setting up a preset in ‘mixbox cs’ to fulfil some of the FX needs, but GB’s standard track compressor and EQ, leave you just needing reverb.  The main reason for using an all-in-one FX is not the sound quality but because a preset can be saved, allowing multiple drop-ins in other tracks easily accomplished, at precisely the same settings ie you can try several pianos, confident the playing-field is level.

But that’s all done once, and except for shortening the reverb ‘tail’ if playing faster, or similar tweaks to accommodate particular playing, it’s set then.  How CMP piano comes across now, is that it really is able to deliver nuances of playing, true pianoforte, that I cannot normally get out of my keyboard.  My experience tells me two things usually create this result: a fast response of the app to the MIDI incoming data; and somehow the sounds are gradated to actually have the expressiveness there, waiting to be brought out.

That’s why it’s my favourite.  It’s warmer, and more nuanced, and sounds ‘smoother’ somehow, is my impression overall.  But most of all it actually does pianissimo and fortissimo, making it five stars.

### 3/5 — Any update?

*2022-11-22*

An update would be nice.  When I click on the setting, it crashes.

### 1/5 — Aplicativo abandonado pelo desenvolvedor

*2021-12-28*

Simplesmente abandonado pelo desenvolvedor, diferente do Colossus piano que recebe atualizações frequentemente, esse aplicativo merece atenção e manutenção.

### 5/5 — Fantastic

*2021-05-04, version 1.13.24*

The white grand piano is fantastic, its just so realistic, even the velocity feels great, I'm stil  loving iSymphonic too 🤗

### 5/5 — Yes, it’s that good!

*2020-12-13*

It is a hefty app, memory-wise, but that’s what you need for real quality. This piano sounds fantastic - even on my tinny keyboard speakers, but with the headphones plugged in it is simply stunning. Like the Korg Ivory you can adjust the velocity settings and this really worked for this piano app making it really sing. The sustain has a lovely ring to it. I’m not a big fan of some of the more ‘out there’ reverb selections, but the ‘hall’ varieties work really well to add extra timbre. 

And that’s what this app is all about - timbre. I have both the Korg Ivory and the Beathawk Grand. Both sound a little ‘muddier’ than this one. You can brighten the Ivory. Unfortunately you can’t do much with the Beathawk unless you channel it through AUM and add some EQ and a decent reverb. 

For the money, this grand piano app has the edge for me.

### 4/5 — Good app, great sound, a few annoyances

*2020-09-06*

I’ve been using for many months now.  A good app with great sounds. Although a few things can be annoying. When connecting to AudioBus, always needing to select the audio option back in the app before sound will play. The volume knob graphic does not correspond with MIDI input even though the MIDI input does change the volume. I think the built-in recording feature needs help. A simple EQ feature would be nice. Otherwise good AudioUnit support (e.g. directly embed into GarageBand), great polyphony, minimal latency, and a useful velocity curve setting.

### 4/5 — Very playable

*2020-05-18*

Great app. Enjoy this program a lot. Wish the concert grand model was a bit different. Better than IGrand but still a bit behind Ravenscroft imho. Pianoteq is still hard to beat overall. Playing for 40 years.

## Frequently asked questions about CMP Grand Piano

### What is CMP Grand Piano?

CMP Grand Piano is a virtual piano sound module for iPad, iPhone, and iPod Touch. It offers high-quality, realistic piano sounds using a large collection of audio samples. It's designed for professional use, allowing connection to external MIDI keyboards for performance and practice.

### What are the key features of CMP Grand Piano?

Key features include realistic sound with over 1.7GB of samples, support for Bluetooth LE MIDI, Audio Unit, and Inter-App Audio. It also offers a MIDI player/recorder, configurable audio latency, Hermode Tuning, and the ability to run in the background.

### How much does CMP Grand Piano cost?

The base app is free, but it offers additional high-quality piano sounds as in-app purchases. These additional sounds provide further sonic variety and expand the app's capabilities.

### What devices is CMP Grand Piano compatible with?

The app is designed for iPad, iPhone, and iPod Touch. It is noted for its lower resource consumption, allowing it to run on older devices compared to other high-quality piano apps.

### Can I use CMP Grand Piano for live performance?

Yes, the app is designed for professional usage on stage. You can connect an external MIDI keyboard to your iPad/iPhone/iPod Touch using supported adapters to play live.

## Version history (last 5 releases)

### 2.1.1 — 2026-01-19

•  Minor corrections.

### 2.1 — 2025-07-07

•  Fixes an issue with the Upright Piano model.
•  Improved download of piano models.
•  Audio Unit: added audio rendering time statistics.
•  Audio Unit: detects audio dropouts and shows a warning in this case.

### 2.0.2 — 2025-05-12

Fixes a regression of previous update which caused a crash on some older devices.

### 2.0.1 — 2025-05-09

Fixes a crash with iOS 18.

### 2.0 — 2024-11-19

Let's wipe off the dust from this App: new devices, new features. Thank you for your support!

## Apps similar to CMP Grand Piano

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| [Ravenscroft 275 Piano](https://appshunter.io/ios/app/ravenscroft-275-piano/id966586407) | 4.4 (317) | $35.99 | Music |
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## More apps by Christian Schoenebeck d/b/a Crudebyte

- [MIDI Wrench](https://appshunter.io/ios/app/midi-wrench/id589243566)
- [iSymphonic Orchestra](https://appshunter.io/ios/app/isymphonic-orchestra/id892220800)
- [iCathedral Organ](https://appshunter.io/ios/app/icathedral-organ/id925910220)
- [Oriental Strings](https://appshunter.io/ios/app/oriental-strings/id945125583)
- [Heavy Brass](https://appshunter.io/ios/app/heavy-brass/id1037802910)

All apps by Christian Schoenebeck d/b/a Crudebyte: https://appshunter.io/developer/428367741

## Related topics

[grand piano midi](https://appshunter.io/ios/topics/grand-piano-midi)

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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 2026-09-06.*