I don’t have any suggestions, but could you perhaps clarify how exactly you transferred the song from Youtube to iTunes? Was a program used between the two? What program? Or did you somehow purchase it? or Download it? What file type is involved?
The problem I’m having is that youtube doesn’t download naturally/easily(/legally?) and iTunes doesn’t record, that I know of.
Audacity was a good application for manipulating and elementary editing of songs.
I used to record off the satellite channels (audio out to mic in) and then use it to clip to the exact moments the song started and ended, fade-in fade out, etc. IIRC it also had a volume adjust option.
(IIRC the volume adjust on iTunes did not actually change the file, it simply told your iTunes program -and presumably your iPod/iPhones - “play this one louder”)
Yes, I think so. You can also set a start and end point for the song, and iTunes will skip the rest but not alter the file. Then you can reconvert the file (be warned of possible quality loss) and the new file will be trimmed. Presumably the volume thing is similar?