soundcraft spirit live 4.pdf - Free Pro Audio Schematics

feedbackfoldbackfrequency response(sub) groupheadroomhighpass filterline level signalsmono outputpan (pot)peakingPFL (pre-fade listen)rolloffshelvingspilltalkbacktransientthe ‘howling’ sound caused by bringing a microphonetoo close to a loudspeaker driven from its amplified signal.a feed sent back to the artistes via loudspeakers orheadphones to enable them to monitor the sounds they areproducing.the variation in gain of a device with frequency.an output into which a group of signals can be mixed.the available signal range above the nominal levelbefore clipping occurs.a filter that rejects low frequencies.at a nominal level of -10 to +6dBu, usually coming from a lowimpedance source.a mono sum of the left/ right mix outputs, providing aseparately controlled line level feed for additionalloudspeakers.abbreviation of ’panorama’: controls levels sent to leftand right outputs.an equaliser response curve affecting only a band offrequencies i.e. based on a bandpass response.a function that allows the operator to monitor the pre-fadesignal in a channel independently of the main mix.a fall in gain at the extremes of the frequency response.an equaliser response affecting all frequencies above orbelow the break frequency i.e. a highpass or lowpass derivedresponse.acoustic interference from other sources.the operator speaking to the artistes or to tape via theauxiliary or group outputs.a momentary rise in the signal level.+48V the phantom power supply, available at the channel micinputs, for condenser microphones and active DI boxes.Pa g e 26