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Adds manual section for limiter preamp

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@22515 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jeffrey Goode 2009-08-26 02:23:46 +00:00
parent af967d77d3
commit a0341df6d5
1 changed files with 19 additions and 1 deletions
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20
manual/configure_rockbox/sound_settings.tex
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@ -441,4 +441,22 @@ Enabling \setting{Timestretch} allows you to change the playback speed without
it affecting the pitch of the recording. After enabling this feature and
rebooting, you can access this via the \setting{Pitch Screen}. This function is
intended for speech playback and may significantly dilute your listening
experience with more complex audio.}
experience with more complex audio.
}
\opt{swcodec}{
\section{Limiter Preamp}
The limiter preamp raises the gain of the audio by the selected amount. The associated
limiter function works on the resulting louder signal to reduce any peaks to below the
maximum level. The default selection of 0dB turns all limiter processing off.
The limiter has the effect of reducing dynamic range by amplifying quiet sections while
loud sections are kept just under maximum gain. This allows listening to the quiet sections
of dynamic material in noisy environments while preventing sudden loud sections from being
overbearing.
Think of this as a smart volume control. The preamp in effect turns up the volume by the
amount you select so that you can hear quiet passages. But it senses when a loud section is
about to play and quickly and smoothly lowers the volume as necessary to keep the audio
under the maximum limit. As the loud section fades, the volume is turned back up.
}