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Controls
Upmix/Matrix Decode Select
The UPM-1 has two modes of operation, Upmix and Matrix Decode - the mode of choice can be
selected by pressing the Upmix/Matrix Decode select button. A green status LED confirms that
Upmix mode is selected and an amber status LED indicates Matrix Decode mode is active.
• Upmix Mode
Upmix mode should be selected when processing standard non-matrix encoded stereo material. In
Upmix mode the UPM-1 sends only ambient sounds to the rear surround channels. The only
exception to this is when the Width control is enabled to the point where a ‘wrap around’ effect is
created by feeding varying degrees of front direct sound to the rear channels.
• Matrix Decode Mode
Matrix Decode mode should be selected when processing matrix encoded stereo material (Dolby®
Pro Logic® etc) .In this mode the UPM-1 will detect any stereo material that has been matrix
encoded and any direct sound intended by the encoding process for the rear surround channels will
be sent there.
Direct Sound
The Direct Sound control increases or decreases the level of direct sound by + or - 6dB. In most
applications direct sound is only present in the front three channels.
Front Ambient Sound
The Front Ambient Sound control increases or decreases the level of ambient sound in the front
Left and Right channels by + or - 6dB.
Rear Ambient Sound
The Rear Ambient Sound control increases or decreases the level of ambient sound in the rear Left
and Right surround channels by + or - 6dB.
Width
The Width control enables the Direct Sound in the original stereo image to be made wider - at its
most extreme the Direct Sound will be in the rear channels. An ‘active’ button with status LED is
provided for instant A/B comparison.
Upmix Controls
SoundField UPM-1
User Guide
Dolby is a registered trademark of Dolby Laboratories.
Pro Logic is a registered trademark of Dolby Laboratories.
