The next major characteristic of sound is the timbre. Timbre defines the unique tonal characteristics that distinguishes it from another. Timbre has four primary characteristics; attack, decay, sustain, release.
The envelope of a sound has the following components and would look something like this:
- Attack - The time it takes for the note to reach the maximum level.
- Decay - The time it takes for the note to go from the maximum level to the sustain level
- Sustain - The level while the note is held.
- Release - The time it takes for the note to fall from the sustain level to silence or zero dB.