Instruction Manual

681

Bass Management

Surround Mixing

however, surround meters display more channels. For example, a project in

5.1 would have a six-channel meter.

A. Six-channel meter

Each pair of hardware outputs still uses a stereo meter, but you will see the

meters on several pairs of outputs displaying levels, depending on how

many surround channels your project uses.

See:

Bass Management

A bass management system takes all the frequencies below a certain

frequency (normally 80Hz) from the main channels, and the signal from the

LFE channel, and mixes them together into the speaker that is best

equipped to handle them. This is usually a subwoofer, but sometimes the

left and right front speakers are used if a subwoofer isn’t available. The

reason why this is done is to make use of the subwoofer for more than the

occasional low frequency effect, since the subwoofer is there anyway, and

to lower the effective response of the system to about 25 Hz.

When you encode to Dolby Digital, the LFE channel gets a +10dB gain on

playback from Dolby's decoder. This gives you the option of delivering

some really powerful deep bass during playback, like in that earthquake

sound effect in your recording. Consider also that this +10 dB of low bass

can be added to any low bass that came out of the other 5 channels from

redirection, so you realistically can deliver a sound from the subwoofer that

is more than +20dB above the sound from any other speaker.