ARP 2600 - Understanding Events: Shape, Envelope, and Contour; Event Shape as Envelope or Contour

n
highest
points on
the
higher-frequency
waveform.
2.1634 Thus
we
come to
the
very
important notion that EVENTS
have
SHAPES. And
the SHAPE of any event
is
the
SHAPE OF THE
LOW-FREQUENCY
WAVEFORM
that can
"produce"
the
event.
Thus,
for
example,
playing
a staccato tune on an organ would produce
a
series
of pitches
and
a
series of
events of this
shape
Playing
the same tune
on a guitar would produce,
perhaps,
the same
pitches
Vr
but the events would have
a
different
shape altogether.
2.164 THE
SHAPE
of an
EVENT is
called its ENVELOPE
or
CONTOUR.
In the
example
given
above,
we could
say that the notes
'played on
the
organ have a
different ENVELOPE
from the same notes
'played on
the
guitar
2.1641 Here
are
some possible
envelopes:
banjo
distant
thunder
piano
note
fortissimo
piano note
soft and
staccato
organ
note
organ
note
taped
and played
backward
banjo
taped and
played
backwards
.
Chinese
gong