AVR 245 (serv.man4) - Harman Kardon Audio Service Manual (repair manual). Page 3

OPERATION

DOLBY DIGITAL

Available only with digital input sources encoded with Dolby Digital data. It provides up to 
five separate main audio channels and a special dedicated Low Frequency Effects channel.

DOLBY DIGITAL EX

Available when the receiver is configured for 6.1/7.1 channel operation, Dolby Digital EX is the 
latest version of Dolby Digital. When used with movies or other programs that have special 
encoding, Dolby Digital EX reproduces specially encoded soundtracks so that a full 6.1/7.1 
soundfield is available. When the receiver is set for 6.1/7.1 operation and a Dolby Digital signal is 
present, the EX mode is automatically selected. Even if specific EX encoding is not available to 
provide the additional channel, the special algorithms will derive a 6.1/7.1 output.

DTS 5.1

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

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

MOVIE

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

MUSIC

from matrix surround encoded programs and conventional stereo sources when  

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

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 
mode creates compelling five-channel surround sound from conventional stereo recordings. Game 
mode ensures that special effects are routed to the surround channels, while delivering their full 
impact using the subwoofer, thus fully immersing the game player in the universe of the video game.

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

MUSIC

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

MOVIE

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

GAME

available. Movie, Music and Game versions of Pro Logic IIx are available. Game mode ensures that 
special effects are routed to the surround channels, while delivering their full impact using the 
subwoofer, thus fully immersing the game player in the universe of the video game.

Logic 7 Cinema

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

Logic 7 M

usic

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

harman/kardon

AVR 245/230 service manual

Page 3 of 82