Thinking of making "Audiophile" App, would like some feedback

[avishee]

Heya, I'm posting this on behalf of my buddy.
 
He's a physicist and he recently came back from a trip to Germany with some earphones - The store was a great big room, lots of choices, paralysis by analysis, that sort of thing. You know how it is.
 
Years ago when I fell into researching headphones and visiting forums like this I got pretty obsessive about the whole thing. Now I guess is his turn. 
 
 

The past weeks I have been walking through rows of earphones in my local electronics store, plugging the display models into my iPhone to check the sound quality. As usual, I was playing tracks I like, which have great sound bits, along with and "audio testing tracks" (you know - pink noise, blue noise, some shifting sin waves).
 
Then It hit me – is there an app that does this? Is there an app that is particularly engineered for street-level sound testing? Well, google and the app store returned a roaring "no"….
 
So how about this:
 

1. The app will package a bundle of sound testing tracks built in (for people who don’t know where to get them from).

1. The app will be able to use the iPhone's mic to do some basic response testing.
2. The app will scan through the iTunes playlist, pick up the most popular songs (by play count) and scan for sound-intense bits (bass heavy, solos, wide range bits, etc.).

Then, the app will highlight all these bits and string them together for a personal sound test. Off course, you could pick tracks to scan manually, add bits that
were not recognized automatically and scan for just the type of sound you choose to.

1. As a user, it will be possible to recommend to the community a track, or a bit from a track. If some other user has that recommended track in his playlist – the app will

suggest adding it to his testing track.

1. The users will be able to rank bits and a "most recommended bits and tracks for testing" table will be available to the users.

1. More suggestions?

 
 
I especially need your opinion on both these major questions –
 
1. Will an app like this be useful to you when you buy headphones?
2. If so, how much will you be willing to pay for this product (if at all)?

 
 
I'm a more experienced entrepreneur, he has been badgering me to  help make this. I'm really skeptical this is an app worth doing but might as well run it by you guys and not guess.