Posted on Oct 10, 2012

The expander to complement the compressor is shown. An external op amp is used for high slew rate. Both the compressor and expander have unity gain levels of 0 dB. Trim networks are shown for distortion (THD) and de shift. The distortion trim should be done first, with an input of 0 dB at 10 kHz. The de shift should be adjusted for minimum envelope bounce with tone bursts.

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When applied to consumer tape recorders, the subjective performance oi this system is excellent.

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