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wondersound1.7.doc
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1991-02-02
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/* WonderSound 1.7 may be freely redistributed by all conceivable means. */
- WonderSound is an additive harmonic instrument design tool with a separate
envelope design window and 16 relative harmonic strength and phase angle
controls. The top gadgets in the main window control the harmonic strengths;
the bottom gadgets, the phase angles. Version 1.7 passes all the sound
processing through a lowpass filter, which lessens the high pitch distortion
(aliassing) which has plagued it in the past.
- The two large gadgets on the right control a frequency modulation process
during WAVING. The left one, the multiple of the fundamental (integers
from 1 to 100) for the modulating wave's frequency and the right one,
the amount of modulation. These two gadgets are called the right and
left control gadgets from here on. They control PHAZING, FLANGING, KLIPPING,
FILTERING, ORGING, and ALLPASSING also.
- The large gadget on the far right controls the frequency of the sound
during play.
- The envelope gadgets are from left to right: attack-level, attack-time,
sustain1-level, sustain1-time, sustain2-level, sustain2-time and
release-level, and release-time.
/************** PROCECDURE **************/
- When WonderSound 1.7 first comes up, there is a request to WAIT so the
necessary tables can be computed.
- First you must make a waveform by selecting one or more harmonic strength
gadgets. Then, select "WAVIT." This will bring you to the envelope design
window where you must make an envelope with which your waveform will be
shaped. Select the close-window gadget to leave the envelope design window
and return to the main window.
- By selecting "ENVEL" from the menu you may return to the envelope design
window. Remember, selecting the close-window gadget of the envelope design
window is the last step in creating a new envelope.
- The system uses an accumulative mixing process whereby each harmonic
computed is combined equally with the previous sound, allowing the
development of arbitrarily complex sounds. For this reason WonderSound
is best used repetitively; changing the phase and harmonic strengths
slightly with each run and/or changing the envelope, thus simulating
the more chaotic evolution of a natural sound. Selecting "WAVIT" from
the menu activates the additive harmonic process. With version 1.7 all final
mixes of sound are lowpass filtered (yes, this does slow it down, a little)
but the WAVING process has been optimized to make non-frequency modulated
waveforms faster.
- The display stacks every eight points vertically so sonic regularities
may be visually recognized. Try creating an instrument without changing
the phase angles. This should result in a more ordered mapping and
thus a less subtle musical result.
- There is a string gadget on the top left for naming instruments. The
default name is "IO.inst." Selecting "SAVIT" from the menu saves the new
sound as an IFF 8SVX 5 octave instrument.
- PHAZING and FLANGING add and subtract (respectively) the sound with itself
starting at the point set with the left control gadget and for the amount set
by the right control gadget. The envelope controls the progress of this
process. A small random element is added to the table lookup so that repeated
PHAZING or FLANGING will quickly enrich the sound. If the right control
gadget is set at zero, there will be no processing. If the left control
gadget is set at zero, and the left all the way up, the sound will quickly be
enriched by repeated PHAZING or FLANGING without any change in the sound's
envelope.
- KLIPPING creates a distortion process which is controlled by the two control
gadgets. Best experiment with this one. Good punchy beginnings to sounds can
be had with a sharp beginning to the KLIPPING envelope and the left control
gadget up all the way up. Version 1.6 contains an improved KLIPPING function
and a more delicate control over this distortion process. If the right control
gadget is set at zero, there will be no processing.
- DISSING uses a non-linear distortion process whereby the waverform is
completely remapped according to an envelope you design. This process can
create a lot of aliasing distortion, (horrible screechin' noises) which
can be controlled (kind of) by creating envelope shapes which are less steep.
If you want to create very intense electric guitar-like distortions, try
DISSING the waveform over and over again with the same DISSING envelope.
DISSING does not use the control gadgets. Ideally, if you were to create a
DISSING envelope which rose as a straight line from left to right there would
be no distortion.
- ORGING (sorry, CELLING, LIFEING, just didn't sound right) uses a new
algorithm which treats the waveform as a 4096 point linear cellular automata.
Pioneered by Jacques Chareyon (Computer Music Journal, Winter 1990), it offers
great potential for adding unpredictable but subtle changes to sound. The
two control gadgets govern the parameters of a transition table for the
equation (A * input/3 + B). A is the left control gadget, B, the right.
Two generations of automata are created in the ORGING process. It "usually"
acts as a chaotic lowpass filter.
- ENVELLING now lets you completely re-envelope the sound. By lowering the
envelope at unwanted points, you may erase them (even those trailing sounds).
- FILTERING lets you filter the array with a time variant lowpass filter. The
left control gadget controls the cutoff frequency (7500 is tops). The right
control gadget controls the amount of filtered sound to mix with the original.
- ALLPASSING uses a chaotic allpass filter to produce a chorusing effect. The
left control gadget controls a fluctuating frequency and the right control
gadget controls the mix.
Sorry no loop points, maybe someday... (Soon, I promise...).
Yes, I know this is still one dirty additive synth... Changing the sampling
rate is always problematic and of course...
Speed before beauty...
For your info... the icon is a Tibetan mask.
Comments to: GENIE -> J.HARRINGTO7
COMPUSERVE -> 72570,3034
PLINK -> MSU772
And I, the author, Jeffrey Harrington, do hereby again declare that:
/* WonderSound 1.7 may be freely redistributed by all conceivable means. */