Pioneer SC-89 Owner's Manual - Page 68

06 Listening to your system Better sound using Phase Control and Full Band Phase Control This receiver is equipped with the two types of functions that correct phase distortion and group delay: Phase Control and Full Band Phase Control. Activating Full Band Phase Control is strongly recommended because it also involves the effects of Phase Control. The Full Band Phase Control feature calibrates the frequency-phase characteristics of the speakers connected. 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 lowfrequency 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. ! Upon shipment from the factory, the Phase Control function is in on status. If you perform Full Auto MCACC (page 51 ) or Full Band Phase Ctrl of Auto MCACC (page 98) , the Full Band Phase Control function is automatically turned on after measurement. By turning Full Band Phase Control on, the Phase Control function is turned on as well. Therefore, we recommend that usually the function be used with Full Band Phase Control on. 1 Press MAIN RECEIVER to switch the remote control to the receiver operation mode, and then press AUDIO P.. 2 Use i/j to select 'PHASE'. 3 Use k/l to select 'FULLBND'. Both the Phase Control and Full Band Phase Control functions are switched on. The FULL BAND and tor, on the front panel lights. indica- 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. ! Full Band Phase Control does not turn on with listening modes in which sound is only played on the front speakers or the front speakers and subwoofer. Notes ! 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 103 ). Also, by transferring the measurement data to the computer using the CD-ROM, 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 MCACC PRO PC Display Application Software included on the CD-ROM. ! 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 81 . ! The Full Band Phase Control function does not work for Dolby enabled speakers since they are full-range speakers. 68