UnScramble this Word: i n n s a g t d?

Questions

- A nickname for the sustaining (right) pedal on the piano.?

(It.) - Long.?

(It.) - Alluringly.?

(Ger. ) - Cheerful, jolly.?

- (1) In Ancient Greek music this could be represented on the white keys of the piano from C to C; (2) From the middle ages, the Iydian mode can be represented on the white keys of the piano from F to F.?