The document describes editing sounds by adjusting playback rate, adding volume envelopes, and using pitch envelopes. The author slowed one sound by lowering the playback rate, made another sound fade in and out using a volume envelope, lowered the pitch of a third sound by five semitones, and used a pitch envelope to gradually raise the pitch of a fourth sound over its duration.

1. For this sound I turnedtheplayback rateto 0.675
so that thesound lasted longer and I alsoadded a
volume envelope so thatthesoundwould come
in graduallythen drop off nearer totheend ofthe
sound.
On this sound I editedthepitch, I also added a
volume envelope so thatI could makethe sound
be loud at the start, thenfallofftowards the
middle and thenfinally build backup attheend.
By taking away fivesemitones from the pitch it
made thesounda lotlower.
Here I added a pitchenvelopeso thatI canmake
the pitch ofthis soundgradually get higher as the
sound goes on.