- Dec 3, 2000
Why do we need a dedicated lfe just for the low frequencies (
I guess my question is why have an lfe channel if you can just send full range signals to all the main channels and then have your receiver or pre/pro do any necessary bass managment.
You can do that. In fact, that is how DTS handles the LFE channel.
However, remember that Dolby Digital is a multi-purpose format. It is not just designed to be used in high-quality systems, but in one-box systems and even plugged directly into the TV. If you dump the full LFE signal into some of these lesser systems, you'll blow them through the roof.
The separate LFE channel provides the opportunity to complete ignore the LFE signals when, for example, downmixing to stereo for playback through a TV.
A properly mixed 5.1 channel recording will sound perfectly fine without the LFE channel. With the LFE channel, the mix can have "extra-supersize" bass effects.