I could do with this aswell if anyone can remember the name of it?
Melodyne & Mixed In Key both do it... Melodyne plugin can be opend in cubase and you just hit record and it records the notes into the melodyne window within cubase. Saves rewiring. Next month there new version is out with full polyphony editing and seperates chorded audio into individual notes. Never been anything like this before so exciting times for musicaly challenged people like me.
http://www.celemony.com/cms/index.php?id=dna
If you have a look at the peek at arround 500hz you'll see that there's a peek at 500hz intervals. Key B4 is at 493.88Hz
Using that method may allow you to see problem frequencies that you said made it sound shite on whatever key you tried and eliminate them.
http://wc.pima.edu/~manelson/music%20fundamentals.htm
Thats where you can find the chart I used that has the frequencies of all your notes (Note Frequency Chart). It's a bit big you might want to scale it down.
No seriously though, cheers for this
Havent yet used a freq anylyser before.. can it help resolve problems like muddiness etc too?
No problem dude.
I like Spec analysers because of the visual representation it gives. It will show you things you might not be able to hear. Wether that be through a bad set up (my problem), or due to the fact your deaf as a post.
I first started using a spec analyser after reading about harmonics on wiki, and thought it might be interesting to see how the signal changed when changeing different aspects of the synth running through it.