Surround Mixing

After a multichannel audio track, Aux Input track, Instrument track, or Master Fader has been created, its level meters in the Mix window display multiple channels, as does the metering within any of its plug-in windows—for example, six channels in 5.1 format. For a 5.1 mix, for example, the output path might typically be the first six outputs on your audio interface (leaving outputs 7 and 8 free for an alternate stereo mix, if you wish).

Point One Surround format names with a .1 indicate that there is one separate LFE (Low Frequency Effects) channel dedicated to the subwoofer. If any surround format with two LFE channels were to become an industry standard (such as 10.2), it would consequently have a .2 suffix.