The MusicalEvent Type

This is the base trait and highest level type for all musical events. There are two main subtypes of MusicalEvent:

• AtomicMusicalEvent - a single event that can be played
• Sequence - a sequence of events that can be played in order

sealed trait MusicalEvent:
    enum AtomicMusicalEvent(duration: Duration, velocity: Velocity) extends MusicalEvent
    final case class Sequence(head: AtomicMusicalEvent, tail: MusicalEvent) extends MusicalEvent

Types of AtomicMusicalEvents

• Note - a single note
• Rest - a pause in the music
• DrumStroke - a single drum stroke
• Harmony - a chord or notes in the same voice played at the same time

Next Step: Building Drum Beats