Re: Changing the key signature
Reply #8 –
A good rule of thumb for general congregational singing is to aim for a soprano line that stays within the range from middle C (C4) to the C above (C5). In truth you have a little leeway here (say Bb3 to D5), but if you aim for the range C4 to C5 you shouldn't go far wrong.
Alto range would be around G3 (below middle C) to G4 above.
Tenor range an octave below Soprano, I.E. C3 to C4, and
Bass would be F2 to F3.
Strictly speaking, all these ranges should be able to be extended by around a 5th (E.G. C4 to G5 for soprano) but that extension will not usually be achievable by untrained voices.