TUTORIAL for the HANDBOOK FOR ACOUSTIC ECOLOGY

AUTO-CONVOLUTION

Compositional Examples

These examples are drawn from soundscape compositions by Barry Truax which are fully documented on the WSP Database. The original sound is auto-convolved with itself (*self), then again (*self*self) and in some cases, a third time, shown below the previous one.

Note that the symbol for convolution is *.

In many cases, these versions were also processed further by transposing them up or down, mixing them together, combining them with a reversed version, or by granular time stretching.

SOURCE
ORIGINAL
*SELF
*SELF*SELF

*SELF*SELF*SELF
SPECTRUM click to enlarge

3 Piano Arpeggios
From the Unseen World

Note the softened attacks

Metal Hull hit
Earth & Steel

Note the softened attacks

Metal Hull multiple hits
Earth & Steel

3 hits followed by 7 more

Note the buildup towards the middle

Bird Solo
Garden of Sonic Delights

Fly buzzing
Garden of Sonic Delights

Salvator Mundi bell
The Bells of Salzburg

Note the softened attacks

Note how the partials emerge

Choir procession
The Bells of Salzburg

Note how the pitches overlap to make a chord

SOURCE	ORIGINAL	*SELF	SELFSELF SELFSELF*SELF	SPECTRUM click to enlarge
3 Piano Arpeggios From the Unseen World		Note the softened attacks
Metal Hull hit Earth & Steel		Note the softened attacks
Metal Hull multiple hits Earth & Steel	3 hits followed by 7 more	Note the buildup towards the middle
Bird Solo Garden of Sonic Delights
Fly buzzing Garden of Sonic Delights
Salvator Mundi bell The Bells of Salzburg		Note the softened attacks	Note how the partials emerge
Choir procession The Bells of Salzburg		Note how the pitches overlap to make a chord

TUTORIAL for the HANDBOOK FOR ACOUSTIC ECOLOGY AUTO-CONVOLUTION Compositional Examples

TUTORIAL for the HANDBOOK FOR ACOUSTIC ECOLOGY

AUTO-CONVOLUTION

Compositional Examples