Music Studio Guitar Recording
And here are the details:
http://www.xewton.com Music Studio offers a complete music production environment for the iPad/iPhone/iPod touch with features and a sound quality previously only known to desktop applications and expensive audio hardware.
It combines a piano keyboard, 65+60 studio-quality instruments with sustain, a fully fledged 127-track sequencer with audio tracks, extensive note editing, reverb, real-time effects, microphone recording and much more on a user-friendly interface.
Try the free Lite version!