Given this piece of music:
A learning app tells me to play an F# as the 2nd and 3rd note. My concern is that there is no sharp symbol on the 1st space. I figured there is a sharp on the line corresponding to a higher F# (the leftmost symbol), but that's a different note...
Luckily, the piece doesn't have that higher F#. If it had, would I be supposed to play both higher in pitch? Or only the higher one (the lower one would just an F)?
Also I read you can't put more than 7 symbols (either flats or sharps) in the key signature. It doesn't make sense since there are more lines and spaces combined (including or not ledger lines).
Could you please explain it? Thanks.