Studio­mix; T­d (Theater­dimensional); Tv Logic - Onkyo TX-NR545 Manual

subwoofer.
Studio­Mix
Suitable for rock or pop music, Listening to music in this mode creates a
lively sound field with a powerful acoustic image, like being at a club or rock
concert.
T­D (Theater­Dimensional)
In this mode, you can enjoy a virtual playback of multichannel surround
sound even with only two or three speakers. This works by controlling how
sounds reach the listener's left and right ears.
TV Logic
Suitable for TV shows produced in a TV studio. This mode enhances the
surround effects to the entire sound to give clarity to voices and create a
realistic acoustic image.
Unplugged
Suitable for acoustic instruments, vocals and jazz. This mode emphasizes
the front stereo image, giving the impression of being right in front of the
stage.