Consonant/dissonant
This example from a string quartet by Haydn uses mostly intervals that do not clash – it is very consonant:
This example from a string quartet by Bartok uses lots of clashing intervals – it is very dissonant:
Diatonic/chromatic
This example from a symphony by Mozart uses only the seven notes taken only from the scale – it is diatonic:
This example from an opera by Rimsky-Korsakov uses lots of notes that are not taken only from one scale – it is chromatic:
Major/minor
A Haydn piecein a MAJOR key:
A Haydn piece in a MINOR key: