Changes
/* ENV */
:'''HORIZONTAL''': means how big is the step size from left to right (0-255)
==== <code>ENV‹volume envelope number›[,‹volume env. section›][,‹volume env. section›][,‹volume env. section›][,‹volume env. section›][,‹volume env. section›]</code> ====
:The ENV command define the VOLUME shape of a sound which means manipulating the loudness in a certain range.
:The command could looks like:
