ok, please i need some good knowledge. I have previously tried this and it kinda worked but with floors. Working with the 3.5mm headphone jack of the iphone, i wired a 3.5mm female mono to the mic input of the male plug(which is a 4 pin) and the ground. then another 3.5mm female to the audio L, R, and ground for the output. THis is for recording and playback in applications such as amplitube and fourtrack. so plug your guitar in, record, and playback through headphones without unplugging and plugging in. I am after the same idea as the iRig. http://www.ikmultimedia.com/irig/

Problems:

- the applications dont always detect a line in? only sometimes and its very touch and go.

- Playback sounds weird. just not normal.

im guessing mayb i need some diodes or cappacitors or resistors? anyone please help?

Thanks