*** ATTENTION! ***
1. Cello is a *SOUND PLUGIN* for another app called Functional Ear Trainer. It's not a stand-alone application!!! Install FET first.
2. Moreover you need to have an in-app purchase "Sound Plugins" to enable them.
To activate Cello:
0. Install it.
1. Run Functional Ear Trainer.
2. Click on the "gear" icon in the Main Menu.
3. Choose "Cello" under the "Sounds" setting.