| I'm having a bit of difficulty thinking of a way to emulate how audio
signals as laid on magnetic tape could be manipulated in the same manner
using digital tools. I suppose one could lay the waveform down in a table
and rotate the axis of reading in a graphical manner to some extent. I'll
leave the hypothetical aspects of that discussion to those that are more
knowledgable of the physics involved. ;-)
However, after a few days of thinking on this, a more obvious alternative
came to mind.
This sounds very similar to an experiment I did with the bmp2wav and vice
versa program that was mentioned her a few weeks back.
I recorded some straight verbal text in wave format.
Then used the wav2bmp program to turn it into a bmp which was essentially
similar to what hetro does.
The resulting bmp was brought into a graphics editor and rotated 90 degrees,
thus changing the time domain into frequency and the frequency domain into
time.
This bmp was run back through the bmp2wav converter and saved as wave file.
The result was an interesting sound event with an interesting side effect of
having added reverb from somewhere I don't quite understand yet.
I can see how rotating each original sound event's spectral content to some
arbitrary angle in the graphic editor and converting it back to wave in a
like manner could achieve a similar context as the Cage piece, though not
the same physics. Putting these snippets together in some multitrack sound
editor would be interesting to pursue.
What fun. A new sound toy!
Ricardo MadGello
Out & About.. . . . . . . .
-----Original Message-----
From: owner-csound-outgoing@maths.ex.ac.uk
[mailto:owner-csound-outgoing@maths.ex.ac.uk]On Behalf Of Jean-Michel
DARRÉMONT
Sent: Saturday, March 20, 1999 4:20 AM
To: csound@maths.ex.ac.uk
Subject: Cage's Williams Mix
Hi,
Reading the book:"Conversing with Cage" from Richard Kostelanetz I noticed
Cage's commentary about his
realisation of Williams mix in 1952.
They choped up a recorded tape in 1097 fragments and spliced them back into
the band.
In that way they put the splices in any orientation refered to the normal
horizontal reading.
The splices where played mainly diagonaly.
He said that the sounds produced that way were "perfectly beautiful sounds"
no
doubt they are at least quite unusual.
Here comes to mind this question: how can a soundfile be read in CSound at a
variable angle saying that 0° is the normal playback, 180° backward and 360°
normal playback again?
It would be interesting to try this, specialy when we consider they spent
one
year with a five or six persons team to realize Williams Mix, cutting,
splicing tiny pieces of tape, using chance operations to determine length
and
angle of reading in a terribly meticulous work.
Digital synthesis could do that in a clic and that way experience and bring
the process further.
Is hetro/adsyn necessary or pvoc or something simpler?
Any idea?
Regards.
--
Jean-Michel DARREMONT |