z2 This mode plays back 2-channel sources in 5.1 or 7.1-channel playback. It cannot be selected when headphones are used, or when only front speakers are used.
z3 These modes add new channels to 5.1-channel surround using Audyssey DSX® processing (vpage 152 “Audyssey DSX®”).
z4 This mode cannot be selected when DSD signals from Super Audio CD are input.
z5 Some sound modes cannot be selected, depending on the audio format or number of channels of the input signal. For details, see “Types of input signals, and

corresponding sound modes” (vpage 221).