10.6

910Logic Pro User Guide
The center speaker is typically used for dialogue and incidental music/effects tracks. Its
level should be similar to the left and right speakers, but can be increased to enhance the
intelligibility of dialogue.
You should aim to have the sound from all front speakers arriving at the listening position
at the same time.
You should set the levels of surround speakers and the subwoofer (LFE) to be immersive,
and part of the surround stage, rather than “additions” to the front speakers. In general,
surround speakers (and the subwoofer) are used for surround effects, main score, and
incidental music/effects tracks.
Also critical for the surround and subwoofer channels is the delay time. Assuming that the
levels of all speakers are suitable, the timing of the surround (and LFE) speakers may seem
slightly “out” in comparison to the front speakers. Most surround amplifiers allow you to
negatively or positively adjust the delay of these speakers.
The surround encoding process—performed in Compressor, available in the Mac App
Store—writes “surround encode flags” for the surround speakers, depending on the
chosen format. These flags are understood by surround decoders (AV receivers, decoding
software, or surround amplifiers).
There is no need to set slight delays between tracks. The surround encode flags are
designed to handle this.