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Compatibility testing for Chordana Play for Piano on devices running Android 13 has identified a bug that prevents some functions from working properly when using Bluetooth MIDI.* 
We have confirmed that this bug occurs only with Android 13, and Google are currently working on a solution. 
Please refrain from using this app on Android 13 until the issue is resolved. We apologize for any inconvenience. 
This problem does not arise on devices running Android 12 or earlier or when a USB cable connection is used.

* When Wireless MIDI & Audio Adaptor (WU-BT10) is used.
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*To use the midi player with the Wireless MIDI & audio adaptor (WU-BT10),
the system requirement of the smart device must be Android OS 8.0 or higher and a Bluetooth® Low Energy compatible device.

* If a USB-MIDI incompatibility warning appears when you install the app on your smart device, you cannot connect to a musical instrument.

◆Piano Remote Controller
Connect your smartphone or tablet to a compatible Casio digital piano to control various settings.
・Select tone, play internal songs and more from the screen on your device.
・You can also check settings not directly visible on the instrument itself, such as the tuning frequency readout (Hz) and temperament type.

● Supported models
PX-770, PX-870, AP-270, AP-470
PX-S1000, PX-S3000, CDP-S100, CDP-S90, CDP-S150, CDP-S350
PX-S1100, PX-S3100, CDP-S110, CDP-S160, CDP-S360

● What is needed for connecting and the connection method used
See here for more details on connections.
https://web.casio.com/app/en/piano/support/connect.html

◆MIDI Player
Visually check the next key or keys to be played, and display them in the piano roll window. 

◆Descriptions of Built-in Songs
View descriptions of the app's internal songs and corresponding composers. Control playback of songs in the digital piano's internal Music Library when connected to compatible Casio digital pianos.

PTNA Piano Encyclopedia : http://www.piano.or.jp/english/ 
* PTNA: Piano Teacher's National Association

◆PDF Score Viewer
The viewer can display the PDF sheet music of 60 songs in the Music Library. It can also be used as a regular PDF file viewer.

Connecting the smart device via a USB cable or a wireless adaptor enables you to use the 3-pedal unit (SP-34) or the damper pedal (SP-3 single-pedal unit) as a page turner.

● Supported models
PX-S1000, PX-S3000, CDP-S100, CDP-S90, CDP-S150, CDP-S350
PX-S1100, PX-S3100, CDP-S110, CDP-S160, CDP-S360

Users of models that do not support page turning can still access page-turning capability by using a third-party Bluetooth page turner.

Models on which operation is confirmed
● iRig Blue Turn
● AirTurn PED pro

◆Audio Player
Play back audio on your device with musical tools such as key shift and tempo change, looping, and melody cancel.

◆Connecting your smart device to a musical instrument via a wireless adapter
● Supported models
PX-S1100, PX-S3100, CDP-S360

● What is needed for connecting and the connection method used
See here for more details on connections.
https://web.casio.com/app/en/piano/support/connect.html

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★System Requirements(Information current as of August 2021)
Android 6.0 or later required.
Recommended RAM:  2 GB or more
*To use while connected to a supported Casio digital piano, an OTG-compatible smartphone/tablet running Android 6.0 or later is required. (Some smartphones/tablets may not be supported.)

Recommended for use on the smartphones/tablets listed below.

Operation is not guaranteed on smartphones/tablets not included in the list. 
Smartphones/tablets for which operation has been confirmed will be progressively added to the list. 

Note that smartphones/tablets for which operation is confirmed may still fail to display or operate correctly following updates to the smartphone/tablet software or Android OS version.

[Supported smartphones/tablets]
https://support.casio.com/en/support/osdevicePage.php?cid=008003002

Making digital piano performances easier and more fun!