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Roger Nichols Digital Spl-izer

The Spl-izer from Roger Nichols Digital is an adjustable 3-band, 24 dB/octave FIR (Finite Impulse Response) frequency splitter that allows the three bands to be isolated and routed to aux or instrument tracks for separate processing. The use of FIR filters ensures that no phase shifting occurs at the frequency split points. This plug-in allows the conversion of single-band signal processors to 3-band processors.

Spl-izer features user-adjustable frequency split point and audio levels. The low- to mid-split point can be set from 80 to 1,475 Hz, while the mid- to high-split point can be set from 80 to 16k Hz. Users can select between Hanning or Blackman windows. The various level meters feature Roger Nichols Digital’s proprietary +8dB input meter with peak and RMS level indicators.

The direct output of the plug-in can be switched between Mute, Sum, Low Band, Mid Band and High Band for instant monitoring. The three bands created by the splitter each have their own level meter and adjustable gain. The plug-in makes these signals available to a DAW as individual buses.

The bus signals created by Spl-izer (Low, Mid and Hi) can then be inserted as an input on any other track for further processing. A large Band level meter indicates both the crossover points and the audio level of each band.

Roger Nichols Digital will exhibit at the 123rd AES convention in New York City, October 5-8, 2007, booth #776.

For more information, visit Roger Nichols Digital at For more new product announcements, visit