- 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
- 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%.