Q127 Fixed Filter Bank


  • 88 Hz Low Pass
    level of the 88Hz low-pass filter
  • 125 Hz, 175 Hz, 250 Hz, 350 Hz, 500 Hz, 700 Hz, 1 kHz, 1.4 kHz, 2 kHz, 2.8 kHz, 4 kHz, 5.6 kHz
    control the level of the band-pass filters with the given frequencies
  • 7 kHz High Pass
    level of the 7kHz high-pass filter
  • normal/bypass
    bypass switch


The Q127 fixed filter bank contains 12 bandpass filters, a highpass filter and a lowpass filter used to attenuate frequencies throughout the audio range. Filter frequency values are fixed and spaced at 1/2 octave intervals. A bypass switch allows quick removal of filtering.

Q140 Fixed Filter Bank Aid: designed to be used beside the Q127 Fixed Filter Bank to provide individual outputs for each filter section. Each output is attenuated by 75%.

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