I have been looking at making this myself but unfourtunately i dont have the time to do it.

To convert audelicious into a simple professional audio measurementprogram.

What is missing is that audelicious is linear instead of logaritmic (Linear is rather useless in audio) and it doesnt have userdefined zoom for frequency and decibel.
Also, to track and show the peakfrequency is a rather useful function which seems to be simple to implement..
And it would also be nice with a tone/sweep/pinknoise generator thru the headphonejack.
The ability to accept a standard calibrationfile for a measurementmicrophone thru the inputjack would also be nice, but not necessary.

The part i am missing most now in audelicious, is a logaritmic scale and the ability to freely choose frequency an db scales.
Also, a Overloadindication to tell when the measurements arent valid anymore is rather vital.

Audelicious source:
http://mynokiablog.com/2010/03/31/vi...he-nokia-n900/

An app for IPhone that explains what i mean.
http://www.studiosixdigital.com/fft_demo_part_one.html
http://www.studiosixdigital.com/rta_demo_video.html