z3 It cannot be selected when headphones are used, or when a speaker configuration with any height speakers is used.
z5 The sound mode that can be selected differs depending on the audio format of the input signal and the number of channels.
z6 This cannot be selected when headphones are used.
z9 Selectable when "Surround Parameter" - "IMAX" is set to "On" in the menu and a 48 kHz sampling frequency DTS 5.1 channel signal is being input. (v p. 163)