They do get those ideas though. Grrrrrrr. I know someone who slavishly goes back to CDs to get the definitive key/tune/riffs/chord voicings etc - but the whole effort is doomed because their voice is very limited & cannot complete the exact copy they want to achieve anyway. I believe they'd be better off to adapt the song to their own capabilities so that they can perform it to the best of their ability - rather than reaching for the unobtainable.