Phonic 1 Rack Unit Digital Equalizer and Real-time Spectrum Analyzer I-7600 Dual-channel 30-band, 1/3-octave digital graphic equalizer 24-bit A/D and D/A converters and 32-bit digital signal processor (DSP) Stores up to 60 programs: 30 factory set, 30 user-defined Pink noise generator outputs balanced test signals at 0 dB Variable low-pass filter (LPF) and high-pass filter (HPF)