m908 User Manual, Rev. G
5.5 DIM
The multi-function DIM / (x-feed) switch controls the monitor DIM and headphone x-feed
features.
Speaker DIM attenuates the current Control Room speaker system and/or the headphones by
the preset attenuation level. When dim is active, the switch is lit solid yellow.
DIM level and which outputs it affects can be configured in
5.6 X-FEED
Press-hold of the DIM / (x-feed) switch engages the Headphone cross-feed circuit in the
headphone output. When x-feed is active it is indicated on the headphone status display. X-feed
(cross-feed) simulates the acoustics of a loudspeaker listening environment which can
significantly improve imaging while reducing listening fatigue when using headphones. This
feature employs carefully designed signal cross-feed, filtering and delay circuits to simulate hrtf
(head related transfer functions).
Press-hold the DIM (x-feed) switch to toggle Headphone Crossfeed on and off. Crossfeed is
indicated in the upper right corner the phones volume window.
When listening to loudspeakers in a room, your left ear hears sound primarily from the left
speaker (and vice versa) but also receives a signal from the right speaker at a lower level and
with some time delay compared to the right ear. As well, the right speaker sound that reaches the
left ear does not have a flat frequency response as the sound waves have traveled around the
shape of your head before reaching your left ear. The brain uses delay, level and frequency
response characteristics to process the location of a sound and hence, create an aural image.
When listening to a stereo (or down-mixed) signal through headphones, each ear only hears
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Illustration 19: Direct Input Offset on Summed Input
