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featured article |
How Does A Music
Synthesizer Work?
A
music synthesizer makes
sounds by using an electrical circuit as an oscillator to create
and vary the frequency of sounds in order to produce different
pitches. As long as the pitch is within the range of frequency
that can be heard by a human ear, it's known as a "musical
pitch" (so a dog whistle wouldn't count) as a musical pitch. You
can use a keyboard to vary these pitches at discrete intervals
that correspond to the notes on the musical scale. If you put
several oscillators together, you can combine several pitches to
create a "chord".
OK, we've got pitch down (at least in a very simple sense). How
do you vary the tone of a particular pitch? That is done by
playing a given pitch with waveforms of different shapes (common
waveforms include sine, square, sawtooth, and triangle
waveforms). Since the harmonic structure of these waveforms
differ, our ears interpret them as different tones. The sound
you will hear can also be modified by voltage-controlled
amplifiers (VCA) and voltage-controlled filters (VCF).
Synthesizers are able to only mimic the sounds of non-synthetic
instruments, but also to create sounds that absolutely cannot be
played by anything but a music synthesizer. That is because a
music synthesizer is well-suited to delicate manipulations of
its oscillators. Nevertheless, it's a lot easier for a
synthesizer to create entirely new sounds than to mimic the
sounds of acoustic instruments because the waveforms of acoustic
instruments are so complex. Interestingly, once complex sound
that synthesizers so far have been very bad at reproducing is
the human voice (although improvements are being made in this
technology).
The entire
electronic
music scene would be
virtually impossible without the use of synthesizers (no doubt
some wish it were). Nevertheless, the number of sounds that a
musician has to work with has been exponentially increasing in
recent decades, and we have only scratched the surface of the
creative possibilities. Imagine the consequences if a machine
was invented that could generate 100,000 hitherto unknown
colors?
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source:
ArticleBase.com |
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