Free iOS Strings app list (instruments like Violin, Lyre, Cello, Viola, Double bass, Mandolin, Banjo etc.)
Turbosounds for Accordion provides many special sounds of the Oberkrainer folk music.
|Instrument sounds||Keyboards, Guitar, Strings, Winds, Ethnic, Other|
|Supports||Audio Unit (AU)|
|Rating||total:(21), current: (21)|
You can use your Synthesizer, Digital Piano, as a MIDI keyboard and produce sound with iOS device (iPad or iPhone). Connect your instrument through «Lightning to USB Camera Adapter» or use professional USB MIDI interface (you should check that your instrument or the MIDI interface is compatible with iOS devices).