6 SOUND EFFECTS GENERATION
One of the main uses of the PSG is to produce non-musical sound
effects to accompany visual action or as a feature in itself. The
following sections outline techniques and provide actual examples of
some popular effects. All examples are based on a 1.78977MHz PSG
clock.
6.1
Many effects are possible using only the tone generation capability of
Tone Only
the PSG without adding noise and without using the PSG’s envelope
generation capability. Examples of this type of effect would include
Effects
telephone tone frequencies (two distinct frequencies produced
simultaneously) or the European Siren effect listed in Fig. 27 (two
distinct frequencies sequentially produced).
Fig. 27 EUROPEAN SIREN SOUND EFFECT CHART
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