User manual PRESONUS VXP

[. . . ] User's Manual VXP MICROPHONE SMART PRE-AMPLIFIER COMPRESSOR DE­ESSER EXPANDER SEMI­PARAMETRIC EQUALIZER USER'S MANUAL Version 1. 0 © 1999, PreSonus Audio Electronics, Incorporated. All rights reserved. WARRANTY PreSonus Limited Warranty PreSonus Audio Electronics Inc. warrants this product to be free of defects in material and workmanship for a period of one year from the date of original retail purchase. To be protected by this warranty, the purchaser must complete and return the enclosed warranty card within 14 days of purchase. [. . . ] Another vocal application might be a newscaster or "on-air" talent reading copy for radio or television. HEAVY: The group of six presets found in this section range from 2. 5:1 up to 8:1. These settings provide the greatest control over signal transient content. The range within the performance is restricted with these settings allowing the least divergence from the loudest to the quietest portions on the signal being processed. These settings are very useful when control is more important than the dynamics within a performance. A really rockin' vocal with the singer "eating the mic" is a type of application where the higher settings really shine. If you are concerned with losing signal level during a take or performance, these higher settings can assist you by keeping the signal more consistent and reduce the need of constantly pushing the fader up or down just to keep a uniform volume being sent out or recorded. The engineers at PreSonus have done a remarkable job in designing a function that is this effective at constraining the signal level, while at the same time, manages to let the signal remain audibly transparent and sounding relatively unaffected. 2. 4 EXPANDER 17 CONTROLS & CONNECTIONS An Expander is a processing device used to increase the dynamic range of the signal being processed through it or in the case of down ward expansion, as in the VXP, to decrease the signal. Downward expansion provides a hybrid result, i. e. , signals above the Threshold are untouched while those below the Threshold are attenuated at a ratio set by the Ratio control. Setting the Threshold level to just below quietest vocal level and adjusting the Ratio to 3:1 will cause the Expander to decrease the signal below the point set by the threshold as soon as the vocal signal stops. This level decrease will occur at the rate set by the ratio setting, in this case 3:1, effectively eliminating any unwanted noise from coming through. The resulting decrease in signal would be down to ­30dB if the VXP Expander's Threshold had been set to ­10 dB. The VXP's Expander is designed to operate below the selected Threshold at the amount determined by the ratio setting selected. If the quietest signal was ­10 dB as in the example, then the decrease that automatically occurs with the ­10 dB threshold setting would be-30 dB at a ratio of 3:1. 2. 5 DE-ESSER A de-esser is a special type of compressor designed to operate only at predetermined frequencies to reduce the effect of vocal sibilant sounds such as S's at the beginning and ending of words, for example. The VXP DeEsser has a variable threshold range from ­40 dB to +20 dB. The frequency of operation is determined by selecting the most effective frequency with the Frequency Range controller. Annoying "S" sounds can be completely removed leaving the desired signal intact with the proper adjustment of the frequency and threshold controls. The 4 segment LED shows the gain reduction occurring due to the De-Esser functioning. 18 CONTROLS & CONNECTIONS 19 CONTROLS & CONNECTIONS 2. 6 EQUALIZER The Equalizer section of the VXP contains a 4 Band Semi-Parametric Equalizer. There is also available Low Mid Narrow Q Select and High Mid Narrow Q Select, as well as, an 80Hz filter. An In/Out switch is provided for auditioning the effects that the equalizer settings are having on the signal being processed. The operator can boost (up to +12dB) or cut (down to -12dB) those frequencies below 100Hz. The term Shelving describes a filter that adjusts all frequencies above or below a center frequency. LOW MID RANGE The LOW MID-RANGE controls those frequencies in the lower mid portion of the frequency spectrum. [. . . ] +24dBu Frequency Response. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Hz to 50kHz Internal Operating Level. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0dBu = 0dB Microphone Pre Amp Gain. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . + 12dB to +38dB THD + Noise(0%IDSS). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <0. 003% THD + Noise (Full IDSS). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . >0. 500% Input Connector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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