JBL SP MKII User Manual page 13

JAZZ
The Jazz mode is particularly well suited to any live recording of popular or jazz music.
The soundstage will be primarily frontal with ambience coming from the surround
speakers. Separation of instruments will not sound exaggerated, but will sound like an
ensemble playing in front of you. The natural room acoustics of the recording environ-
ment will be preserved. The Jazz mode delivers full-range mono surround channels
with fully-selectable time delay, Panorama and "fast" logic speed. "New" jazz and
fusion music also benefit from this mode. Blues fans will find the Jazz mode the most
effective, especially on live recordings.
HALL 1
This music mode is a "purists" mode suitable for any music where minimum process-
ing is desired. It is a passive circuit (no steering logic) similar to the L-R circuit often
erroneously referred to as the "Hafler" circuit. This circuit extracts ambience from a
natural stereo recording and places it in the surround channels. Front channels are
completely unprocessed. A special equalization curve is applied to the surround chan-
nels to emulate the natural decay of high frequencies over distance for more natural
hall ambience. Chamber music is natural and enveloping in this mode, as are all small
acoustic ensembles. The listener is placed close to the performance.
HALL 2
The Orchestra mode, like Chamber, uses no processing on the front channels, and
center channel is disengaged. Orchestra mode applies steering logic only to the sur-
round channels only with a narrow matrix providing a "mid-hall" perspective. This set-
ting is ideal for larger symphonic works. You may switch on, at your option, the center
channel speaker in the 'Orchestra' mode. Steering logic is engaged on the front sound
stage when the center speaker is switched on. Audio signal delay settings may be
extended to 80 ms.
35MM MOTION PICTURE
The decoding matrix is identical to the one used in the Dolby Pro Logic mode, but with
higher speed steering logic and a more extended frequency response on the surround
channels. Audio signal delay settings may be extended to 50 ms.
70MM MOTION PICTURE
This setting is identical to 35mm but delivers controlled blending of left/right front
channel information into the surround channels to provide a sense of spaciousness
with software which has little or no encoded surround information. Audio signal delay
settings may be extended to 50 ms.
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