just want to share how i did some recordings very simple with - in my mind - impressive quality using only my iPad:
1) Download "Musicmemos" app
2) Select Auto Start
3) Start recording ......
=> you can add Drums to your record if you like
4) Export to "Garageband"
5) Fine tune (if you like too)
Voila - done.
Here some sound example i uploaded to "soundcloud":
Let me know what you think about the sound quality. Record was done with iPad Air, without amplifier or additional microphone.