Obviously there are interesting tweaks in the Cydia Store that give one a better user experience on a device with iOS, but there are also many individuals and jailbreak tweaks MusicalKeyboard that turns your qwerty keyboard into a musical instrument.
This new jailbreak tweak aims to make things a little more interesting things by playing sounds of musical instruments instead of classic keyboard sounds.
After installing this tweak, you can choose which keyboard instrument sound will play while you type some text. To do this, you need to go to the preferences panel in the app tweak settings.
You can enable or disable the tweak and choose the musical instrument you want to hear while typing. At the moment, these are the instruments available:
Each time you change the type of instrument, you'll need to touch on the button "save changes" and then touch on respring button for the changes to take effect.
One thing you should know, before downloading this tweak is that each key plays a note at random, so you really can not play with the instrument by means of specific keys as if it were a piano. This may be disappointing for some, but still stops MusicalKeyboard not be an interesting addition for iOS devices.
If for some reason you can not hear the sounds after downloading this tweak, then you have to make sure your device has activated keyboard sounds from the app settings -> Sound -> click keyboard.
MusicalKeyboard is available for download on any device with iOS jailbreak iOS 8 or 9 from the repository BigBoss Cydia for $ 0.99.