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Tuesday, April 7, 2009

The Making of Music and Basic Digital Synthesis

By Dean Hunt

It is fun to play around with the ordinary approaches as well as the Fm synthesis, but there's much more that can be done with sound synthesis.

There are boundaries as to what could be easily performed with the latest methods of synthesis basically due to the fact that they are computer based. The full concept of digital synthesis is set on trying to duplicate acoustic and also analogue sounds. There's constantly numerous ideas and techniques being utilized, and the success is set on how accurate is the audible reproduction.

Four big methods are recommended.

Method 1 : Frequency Domain - Spectral Modeling If we took the Hartmann Neuron synthesizer as an instance, you would find it being a spectral model. Its very well practiced in additive synthesis and also resynthesis. This is relating to the frequency domain.

Method two : Physical Modeling Physical sounds such as spring simulations and also mass simulations can be very tightly reproduced by physical modeling. This is because this kind of modeling counts on mathematical models derived from the acoustical basis of instruments and components. If you really want to achieve those plucked sounds, then this is achieved from the Karplus Strong synthesis, via physical modeling.

Method 3 : No Model Sound Attempt This's also name as loose modeling. This's the method to be applied to AM, Walsh, FM along with Wavetable synthesis.

Method four : Time Domain For granular synthesis, waveform composition and also wave-set distortion you would want to use time based modeling.

Walsh synthesis is able to make new waveforms by using a good deal of square waveforms, plus its entirely digital. Theres one problem with this technique though, and that's the difficulty with being able to adjust the frequency spectrum. For a non complete digital or analogue, you might want to try Digital FM synthesis. In respect to complicated modulation, its extremely more adjustable.

Some try to utilise LFO-type modulation or Yamahass operator concept. For instance this is what FM synthesis is set on. However, it does not achieve huge success with trying to be like analogue subtractive synthesis. The PPG Wave and Waldorfs Microwave series can take the credit for making Wave table synthesis so well-known. Fragmented pieces of sampled sounds are simply played back and looped just like a sampler. To make this yet less tricky, you could take advantage of filters, envelopes and LFOs which are all the standard features.

It must be remembered that the four major methods we mentioned are still capable of using the analogue components, provided it's within their signal chain. Yet they are still digitally-based. - 18758

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