Bryston SP1.7PRECISION User Manual

Page 10

10. Stereo and Stereo Downmix Mode

If this button is selected and the supplied bitstream is more than 2 channels, the

decoder will automatically implement a stereo downmix. Otherwise,

analog or digital two channel signals are passed as conventional stereo.

11. Mono and Mono Downmix Modes

If this button is selected and the supplied bitstream is more than 1 channel, the

SP1.7 software will create a Mono mix of all signals. If the centre channel is

present, the Mono signal will appear in the centre channel. If no centre channel

is present, the mono signal will appear simultaneously on the Left/Right speakers.

NOTE: Downmix [stereo or mono] is a software based automatic mixing

function available within the SP1.7. This process exists because whenever the

number of active decoder outputs or loudspeakers selected in setup is less than

the number of channels in the Dolby Digital program, some channel combining will

be necessary to present the program on the available number of

channels/loudspeakers.

As a part of any program’s production, its producers can set and adjust the type

and ratios allowed for downmixing somewhat to ensure optimum results without

compromising the full Multichannel balance. This is accomplished by including

specific data within the Dolby Digital bitstream which represents different mix-

ing coefficients for the centre and surround channel signals.

These will be detected by the SP1.7 and used to produce the downmix if this

mode is selected.

STEREO

MONO