Module sound

The sounds library provides functions for constructing and playing sounds.

A wave is a function that takes in a number t and returns a number representing the amplitude at time t. The amplitude should fall within the range of [-1, 1].

A Sound is a pair(wave, duration) where duration is the length of the sound in seconds. The constructor make_sound and accessors get_wave and get_duration are provided.

Sound Discipline: For all sounds, the wave function applied to and time t beyond its duration returns 0, that is: (get_wave(sound))(get_duration(sound) + x) === 0 for any x >= 0.

Two functions which combine Sounds, consecutively and simultaneously are given. Additionally, we provide sound transformation functions adsr and phase_mod which take in a Sound and return a Sound.

Finally, the provided play function takes in a Sound and plays it using your computer's sound system.