Question

What form of Jazz first introduced non conventional instruments

Answer 1

Swing was the first form of Jazz that introduced non conventional instruments.
Swing uses a strong anchoring rhythm section which supports a lead section that can include brass instruments, including trumpets and trombones, woodwinds including saxophones and clarinets or stringed instruments including violin and guitar; medium to fast tempos; and a "lilting" swing time rhythm.

Answer 2

Swing......................................