Pioneer SC-55 Owner's Manual - Page 46

06 Listening to your system Standard speakers designed exclusively for audio use generally reproduce sound with the divided frequency bands output from a speaker system consisting of multiple speakers (in case of typical 3-way speakers, for instance, the tweeter, the squawker (midrange), and the woofer output sound in the high-, middle-, and low-frequency ranges, respectively). Though these speakers are designed to flatten the frequency-amplitude characteristics across wide ranges, there are cases where the group delay characteristics are not effectively flattened. This phase distortion of the speakers subsequently causes group delay (the delay of low-frequency sound against high-frequency sound) during audio signal playback. This receiver analyzes the frequency-phase characteristics of the speakers by measuring test signals output from the speakers with the supplied microphone, therefore flattening the analyzed frequency-phase characteristics during audio signal playback - the same correction is made for a pair of left and right speakers. This correction minimizes group delay between the ranges of a speaker and improves the frequency-phase characteristics across all ranges. Furthermore, the enhanced frequency-phase characteristics between channels ensure better surround sound integration for multichannel setting. 1 Press mode. to the receiver operation 2 Press PHASE CTRL (PHASE CONTROL) to select FULLBAND PHASE. Both the Phase Control and Full Band Phase Control functions are switched on. The FULL BAND and indicator, on the front panel lights. Note ! To calibrate and analyze the frequency- phase characteristics of the speakers, either follow the Full Auto MCACC procedure under Advanced MCACC (see Automatically conducting optimum sound tuning (Full Auto MCACC) on page 32 ), or set Auto MCACC menu under Auto MCACC under ADVANCED MCACC to Full Band Phase Ctrl. Select ALL when you perform the Auto MCACC with Auto MCACC menu. Upon calibration of the frequencyphase characteristics of the speakers, the Full Band Phase Ctrl feature is automatically switched on. ! The original characteristics of group delay of the speakers calibrated and the targeted characteristics after correction can be displayed graphically in the GUI screen (see Checking MCACC Data on page 74 ). Also, by transferring the measurement data to the computer using the CD-ROM (AVNavigator), the original characteristics of group delay of the speakers calibrated and the corrected characteristics of group delay can be displayed in 3-dimension on your PC. For details, refer to the operating instructions for the Advanced MCACC PC Display Application Software included on the CD-ROM (AVNavigator). ! Depending on the input signal and listening mode, it may not be possible to set the Full Band Phase Ctrl mode to ON. ! The Full Band Phase Ctrl mode cannot be set to ON in the following cases: - When headphones are plugged in. - When the PURE DIRECT mode is switched on. - When the HDMI audio output parameter is set to THROUGH in Setting the Setting the Audio options on page 56 . Using the Full Band Phase Control's FRONT ALIGN function Full Band Phase Control calibrates frequency phase disturbances (group delay) for the full speaker band (Full Band) (SYMMETRY), but with this unit it is also possible to calibrate the frequency phase characteristics of other speakers to the frequency phase characteristics of the front speakers (FRONT ALIGN). Full Band Phase Control calibration can be performed in the FRONT ALIGN mode by making the settings and performing the operations below. 1 Perform Full Band Phase Control measurements with the Full Auto MCACC (or Auto MCACC) procedure. 2 Perform measurements with EQ Type set to FRONT ALIGN with the Full Auto MCACC (or Auto MCACC) procedure. 3 Press the MCACC button to select the MCACC memory at which the measurements performed with EQ Type set to FRONT ALIGN are stored. 4 Turn Full Band Phase Control on. 46 En