Background
I'm a novice. I'm currently learning to play and sing a "country"-style song on guitar.
I'm playing it in G major.
The melody is just over one octave, from E3 though G4.
That's difficult for me to sing: because I seem to have a bass voice range, from G2 through E4 -- so G4 is too high for me.
Anyway, the original song is recorded in the key of A (two semitones above G).
And my (amateur) teacher performs, but doesn't profess much music theory: so I'm asking you here.
Question
In the movie The Blues Brothers, when they're at the night-hall where "we got both kinds (of music): we got country and western", they decide to sing Rawhide -- and the dialog includes:
- Remember the theme from Rawhide?
- The old favourite. Rowdy Yates.
- What key?
- "A". Good country key.
- "Rawhide" in "A".
Is it true that "A" is "a good country" key: or just a joke?
Or meaningless, e.g. every key is a good country key?
If it is a meaningful statement, why is "A" a good country key: what's good about it?