Question

Potential Matches:
1 : Twelve bar harmonic pattern
2 : Small groups using complex harmonies
3 : Music that was a strong influence on early jazz popular around turn of the century
4 : Relaxed style of jazz popular around the late 40s and 50s
Answer
: Blues
: Ragtime
: Bebop
: Cool jazz

Answer 1

Hm im pretty good with jazz so I'll give it a shot
1. Blues usually use 12 bar harmonic patterns which is why the 12 bar blues is a popular style
2. Bebop challenged the swing era because they thought swing was too easy and predictable whic hcaused them to create complex harmonies that were too difficult to try to do in large ensembles.
3. Ragtime was the precursor to jazz.
4.Cool jazz is cool which is pretty laid back sort of swing