User`s manual

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Page 23
McDSP NF575
Controls
Main
The Main section controls input and output levels, along with
phase control over the output stage.
• In - input signal level adjustment (-24 to +24 dB)
• Out - output signal level adjustment (-24 to +24 dB)
HPF (High Pass Filter)
The HPF section controls affect lter frequency and slope. The high
pass lter is useful for removing low rumble, vocal/dialog track plosives,
and other low frequency noise.
• Freq - high pass lter frequency
• Q - lter slope (6 to 36 dB/Oct)
Notch Filters (1 - 5)
The Notch lter section has 5 fully adjustable notch lters for
removing cyclical noise like 60 Hz hum. Each notch lter has a
range control for adjusting the amount of signal reduction at the
notch lter frequency. The bandwidth (Q) of the notch lter can be
extremely narrow to remove the noise while affecting the remaining
audio as little as possible.
• Freq - notch (band stop) lter frequency
• Q - bandwidth of notch lter
• Range - amount of signal reduction at notch lter frequency
• Solo - pass signal blocked by notch lter (ips lter shape from
bandstop to bandpass shape). Useful for identifying cyclical
noise.
• Link - slave notch lter frequencies 2 - 5 to the frequency of notch one. All
relative frequency offsets between notch 1 and notches 2 - 5 are retained
when the Link control is enabled.