Creative 70EM896106000 Owners Manual - Page 91

RFX Compressor The RFX Compressor is a full-featured stereo compressor effect which features the standard parameters available on most compressors as well as a collection of additional advanced parameters that are useful for more sophisticated applications and special effects: • Threshold, Ratio, Attack and Release w/gain metering • Auto-makeup gain • Adjustable soft knee • Adjustable lookahead/delay • Noise gate (downward expander) • Compressor "tail" expansion • Program-dependent release • Negative compression ratios Signal Flow The block diagram of the RFX Compressor is shown below. 5 - Effects Core Effects Descriptions In L In R (& Sidechain) Compressor Lookahead 0-100mS Input Mode SIGNAL PATH Gain Cells Out L R Out Compressor Delay Compressor Delay 0-50mS Level Detector Threshold Ratio Gain Gain Control SIDECHAIN Attack Release Auto Release Soft Max. Neg. Gate Knee Comp. Comp. Note that the effect is split between a signal path and a sidechain path that contains the compressor's level detectors and gain computation. The signal path of the RFX Compressor is very close to a "straight wire", with only a delay line and one gain control element inserted in it. The sidechain contains the bulk of the compressor algorithm and is responsible for computing the gain control signal. Signal multiplexers at the front of the signal path and sidechain allow linked stereo compression or split signal path/sidechain processing. The RFX Compressor does not have the input gain control that is found on some compressors. These are typically used to align the input signal range to the compression threshold. Instead, we've allowed the RFX Compressor's Threshold E-MU PCIe Digital Audio Systems 91