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README
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1988-08-09
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SYNTHIA DEMO DISK
0 p4m0m
This is a demo of 33mSYNTHIA 31m, a high performance synthesizer available
soon from: 1m
The Other Guys
1-800-942-9402 (Ordering)
0m
Two of several modules are included on this disk. They are fully
functional with the exception of the SAVE functions which has been replaced
with ABOUT SYNTHIA. The release version saves instruments in 33mIFF 31mformat. 4m
OPERATING INSTRUCTIONS FOR SYNTHIA DEMO
0m
To operate the Synthia disk:
33m
1. 31mLoad Kickstart 1.2. (1.1 should work but is untested) 33m
2. 31mPlace the 33mSynthia 31mdisk in df0:. It will boot to 33mWorkbench.
33m
3. 31mOpen 33mSynthia 31m's disk icon. 33m
4. 31mSelect the 33mString 31micon. 33m
5. 31mWhen the 33mPlucked String 31mwindow appears, select the 33mDO SOUND
31mgadget. When the BUSY pointer changes back to the standard pointer,
the AMIGA keyboard can be used to play the instrument or the KEYBOARD
gadget can be selected.
Various parameters can be changed by using the Synthia gadgets. Use
the DO SOUND gadget to implement the parameter changes that have been
made on the main screen and the SPECIAL EFFECTS screens.
1mNOTE: 0mDefaults are set for the Plucked String design.
1mNOTE: 0mREPEAT FINE and REPEAT COURSE change the repeats without selecting
DO SOUND.
1mNOTE: 0mThe other module (ADDITIVE) in Synthia has defaults set and can be
selected. (The defaults for the SPECIAL EFFECTS are set for the Plucked
String instrument default.) 0m
4mBrief description of SYNTHIA: 0m
Synthia is a high performance synthesizer. It provides a musician
with a means of creating musical instruments to a precision which is
difficult to match with hardware based synthesizers. It uses the IFF
format for compatibility with other musical and sound effects products
(digitizers, video managers etc.).
Synthia was not based on an existing synthesizer. Instead Synthia
attempts to synthesize real instruments. Since Synthia uses a computer,
much more interaction is possible than with a traditional synthesizer.
This allows much greater precision to be used when creating instruments.
State of the art algorithms are implemented in Synthia. This allows
a breakdown of Synthia into different modules, each with its own
strengths and weaknesses. The modules implemented at this time are:
1. 33mSynthia 31m- a traditional subtractive synthesis package. A
waveform is repeated through the sound and modified with
filtering, frequency, phase, amplitude modulation, and other effects.
Great for most 'traditionally synthesized' instruments.
2. 33mAdditive 31m- an additive synthesis package. Works by mixing a
changing amount of the first 16 harmonics of a waveform, usually a
sine wave. Can be used to create just about any type of sound
possible. 33mThis module is included in the demo. 31m
3. 33mInterpolative 31m- interpolates between 8 waveforms over the
duration of the sound. Not as accurate as Additive but is excellent
for most percussive musical sounds such as the piano. It introduces
some imperfection which sounds very nice in some circumstances.
4. 33mString 31m- our pride and joy. Does guitars, basses, and
about any type of plucked string possible. It has very little overhead
considering it generates one of the more difficult types of
instruments to simulate. It uses a new algorithm to accomplish this.
33mThis module is included in the demo. 31m
5. 33mPercussion 31m- simulates several families of percussive
instruments. Uses a new algorithm to generate more realistic
percussion.
Synthia uses a waveform editor to design waveforms, envelopes and
tables for various parameters. It features harmonic, Chebyshev
polynomial, linear, and spline generation. Several waveforms are also
available. The user may also draw a waveform if desired.
Synthia also has several modules for modifying an existing sound.
The modules are:
1. 33mFilter 31m- for wow effects etc. Supports highpass, lowpass,
bandpass, and band limit filtering.
2. 33mAmplifier 31m- for making the sound louder or softer. It is a
clipping amplifier so it can generate distortion effects as well.
3. 33mAmplitude Modulation 31m- like an ADSR generator on most
synthesizers, but uses a Synthia envelope which allows 256 point
precision envelopes.
4. 33mReverb 31m- true reverb. This module was designed knowing that
an echoed sound is NOT identical to the original. It is modified with
a frequency dependent phase shift to resemble true echoes. Also has a
filter for simulating concert hall effects. Feedback and level are
independent of each other.
5. 33mFlang 31m- called Phasing on some systems . This is a modulated
phase shift (or comb filter) effect.
6. 33mNon-Linear Distortion 31m- called Wave Shaping or Non Linear
Processing on other systems. This changes the harmonic content of a
sound based on its amplitude etc. Trumpets, flutes, and many other
instruments can be simulated by amplitude modulating a sine wave and
passing it through this module. Fuzz effects can also be created with
this module. Chebyshev polynomials provided in the waveform editor
provide control over this module.
A couple more modules are planned for the release version.
4mCompatablility 0m
The following products have been tested with Synthia generated
instruments:
33m
Deluxe Music Instant Music Deluxe Video
Sonix Music Studio (with IFF conversion)
Soundscape Pro Midi Studio
31m
Synthia should be compatible with many others.
Synthia also allows modification of digitized sounds, so it is a
perfect companion to any hardware product that create sounds.
m p