I am surprise to feel my energy for making music app. It is very difficult to deal with core audio. I have to read some books. And lucky I have a few sample that quickens my work.
I enjoy working on it so much that I found things to improve every day. I have pretty done every feature I list after a month. It is way tougher than bus app but I enjoy it so much. Only thing is I got my neck and back ache after programming every day and night. I need to rest every 30 min. I fall sick just before I finish the app. :)
It is the time I commit to apple iAds. It is so easy to use with the storyboard.
Now I want to play mozart no 40 on the street. My style is so similar, work until sick.