CHAPTER 6
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VOLT PROCESSING
Pre-process and Enhancers
15kHz LPF: Activates a very sharp low-pass filter on the input to protect the processing from
supersonic signals present in some recordings.
Deep Bass: Adds psychoacoustic bump by enhancing just the very low frequencies, such as kick
drum fundamentals.
HF-EQ Pre or Post [AM Only]: VOLT provides additional shelf equalizers, each with switchable
frequency and gain, both before and after the 5-band limiter. If you need additional brightness,
you may find that splitting the boost between these two stages gives you the best combination of
“sparkle” and control.
Phat Bass: Actually makes the speakers in small radios (and earbuds) sound bigger. Adds
harmonic overtones for frequencies those smaller transducers can’t carry, fooling the ear into
thinking the fundamentals are there. On larger speakers, the effect starts to disappear (because
the fundamentals are there in the first place). Be careful! Too much Phat Bass can cause excessive
gain reduction in the lower bands, and might cause muddiness on certain programming.
Warmth: Shelf boost at 150 Hz, compensating for some program material. Be careful! The Phat
Bass warning applies. Also, the resonant frequency of many automobile interiors lies in this range; too
much warmth may sound tubby in cars.
Space-EFX: Maintains a consistent stereo field, by dynamically compensating for variations in
width between one song (or verse) and another.
Voice Detect: Constantly checks for mono program elements (including voice). When it hears
them, it lowers the main channel by the amount you specify in Voice Gain. This can prevent
excessive clipping because of L+R buildup.
Xover: Lets you adjust the critical crossover frequencies that affect warmth and intelligibility or
brightness.
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