What is Synthesis? (6)
Synthesis can be summarized as follows:
1. How does the sound source work? Digital oscillation of the Roland D-50’s analog waveform, FM modulation of Yamaha DX7, AM modulation, or Wavetable PCM playback, or sampling?
2. What is modulation? Modulation in the sound source makes the limit of the basic synthesis function of the synthesizer. In fact, with the advent of PCM, all of the great modulation methods used in analog synthesizers have been forgotten. For example, the Ring Modulation is not currently being applied to any synthesizer; the biggest problem with PCM is the limits of Synthesis. Yamaha also combined PCM with FM, Roland combined PCM with analog waveform modulation, and Kurzweil presented a wider possibility by processing PCM DSP. But fundamentally, it is already open and not much different: Kurzweil is only showing off their K2000 with clear changes to PCM technology.
3. What is Envelope Generator? EG is like the overall color of sound, and is absolutely essential in making musical instrument sounds. It has developed steadily and now it is possible to implement various types of EG.
4. Filter is the key to Subtractive Synthesis. In analog synthesizers, filters are very important factor in determining sound quality. The digital dynamic filters are widely used, and the performance of the filter has a significant impact on Synthesis, which can be used in various configurations with multiple filters. There are two types of filters: Hi Pass/Lo Pass, which can be used for Band Pass or Band Reduction.
5. Traditionally, LFOs are used to modify Pitch in synthesizers; LFOs are also used to give a dynamic feel to the wave or to create a vibrato of the instrument.
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