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In this section |
See also Ambient Sensing Leveler (continuous sensing) |
The expander provides a means of exaggerating the dynamics in an audio signal. If the signal is very quiet, it will make it quieter. If the signal is very loud, it will make it louder. The expander is often used as a single-ended noise reduction device that improves the signal-to-noise ratio.
The Compressor and Expander perform in opposite ways: the Expander attenuates signals below the Threshold Level while the Compressor attenuates signals above the Threshold Level. Also, whereas the compressor begins to operate as a Limiter at higher compression ratios, the Expander begins to operate as a Gate at higher expansion ratios.