AVR 235 (serv.man12) - Harman Kardon Audio Service Manual (repair manual). Page 7

 OPERATION

DOLBY DIGITAL

Available only with digital input sources encoded with Dolby Digital data. It provides 

Center: 0 - 30ft / 9m

up to five separate main audio channels and a special dedicated Low Frequency Effects 

Initial Setting: 12ft / 3.6m 

channel.

Surround: 0 - 30ft / 9m
Initial Setting: 10ft / 3m

DOLBY DIGITAL EX

Available when the receiver is configured for 6.1/7.1 channel operation, Dolby Digital EX is the 

Center: 0 - 30ft / 9m

latest version of Dolby Digital. When used with movies or other programs that have special 

Initial Setting: 12ft / 3.6m 

encoding, Dolby Digital EX reproduces specially encoded soundtracks so that a full 6.1/7.1 

Surround: 0 - 30ft / 9m

soundfield is available. When the receiver is set for 6.1/7.1 operation and a Dolby Digital signal is 

Initial Setting: 10ft / 3m

present, the EX mode is automatically selected. Even if specific EX encoding is not available to 

Surround Back: 0 - 30ft / 9m

provide the additional channel, the special algorithms will derive a 6.1/7.1 output.

Initial Setting: 10ft / 3m

DTS 5.1

When the speaker configuration is set for 5.1-channel operation, the DTS 5.1 mode is  

Delay time not adjustable

available when DVD, audio-only music or laserdiscs encoded with DTS data are played.
DTS 5.1 provides up to five separate main audio channels and a special dedicated 
low-frequency channel.

DTS-ES 6.1 Matrix

When the speaker configuration is set for 6.1/7.1 operation, playback of a DTS-encoded program

Delay time not adjustable

DTS-ES 6.1 Discrete

source will automatically trigger the selection of one of the two DTS-ES modes. Newer discs with
special DTS-ES discrete encoding will be decoded to provide six discrete, full-bandwidth channels
plus a separate low-frequency channel. All other DTS discs will be decoded using the DTS-ES Matrix 
mode, which creates a 6.1-channel sound field from the original 5.1-channel soundtrack.

DOLBY PRO LOGIC II

Dolby Pro Logic II is the latest version of Dolby Laboratory’s benchmark surround technology

Center: 0 - 30ft / 9m

MOVIE

that decodes full-range, discrete left, center right, right surround and left surround channels 

Initial Setting: 12ft / 3.6m

MUSIC

from matrix surround encoded programs and conventional stereo sources when  

Surround: 0 - 30ft / 9m

EMULATION

an analog input or a digital input with PCM or Dolby Digital 2.0 recordings is in use. The  

Initial Setting: 10ft / 3m

Dolby Pro Logic II Movie mode is optimized for movie soundtracks that are recorded with matrix 
surround, by creating separate center, rear left and rear right signals. while the Pro Logic II Music 
mode should be used with musical selections that are recorded with matrix surround or even with
normal stereo mode, creating separate rear left and rear right signals in any case.
The Pro Logic II Emulation mode creates compelling five-channel surround sound from 
conventional stereo recordings.

DOLBY PRO LOGIC IIx Dolby Pro Logic IIx is the latest extension of Dolby Pro Logic II technology that creates a discrete 

Center: 0 - 30ft / 9m

MUSIC

6.1 and 7.1 sound field from matrix surround or two-channel stereo sources in systems 

Initial Setting: 12ft / 3.6m

MOVIE

configured for surround back speakers. Both Movie and Music versions of Pro Logic IIx are 

Surround: 0 - 30ft / 9m

available. These modes may also be applied to a six-channel source connected to the 

Initial Setting: 10ft / 3m

 so that the sound field is enhanced by adding back surround 

channels.

Logic 7 Cinema

Exclusive to Harman Kardon for AV receivers, Logic 7 is an advanced mode that extracts the 

Delay time not adjustable

Logic 7 Music

maximum surround information from either surround-encoded programs or conventional stereo 

Logic 7 Enhance

material. Depending on the number of speakers in use and the selection made in the 

SURROUND

SELECT

menu, the “5.1” versions of Logic 7 modes are available when the 5.1 option is chosen,

while the “7.1” versions of Logic 7 produce a full sound field presentation, including back surround 
speakers when the “6.1/7.1” option is chosen. The Logic 7 C (or Cinema) mode should be used 
with any source that contains Dolby Surround or similar matrix encoding. Logic 7 C delivers 
increased center-channel intelligibility, and more accurate placement of sounds with fades and pans 
that are much smoother and more realistic than with former decoding techniques. The Logic 7 M or 
Music mode should be used with analog or PCM stereo sources. Logic 7 M enhances the listening 
experience by presenting a wider front soundstage and greater rear ambience. Both Logic 7 modes 
also direct low-frequency information to the subwoofer (if installed and configured) to deliver 
maximum bass impact. The Logic 7 E (or Enhance) mode is an extension of the Logic 7 modes that is 
primarily used with musical programs and is available with the 5.1 surround mode option selected 
only. Logic 7 E adds additional bass enhancement that circulates low frequencies in the 40Hz to 120Hz 
range to the front and surround speakers to deliver a less localized soundstage that appears broader 
and wider than when the subwoofer is the sole source of bass energy.

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