From a0341df6d59f69ac05de58d12beb1fc06f6f5ace Mon Sep 17 00:00:00 2001 From: Jeffrey Goode Date: Wed, 26 Aug 2009 02:23:46 +0000 Subject: [PATCH] Adds manual section for limiter preamp git-svn-id: svn://svn.rockbox.org/rockbox/trunk@22515 a1c6a512-1295-4272-9138-f99709370657 --- manual/configure_rockbox/sound_settings.tex | 20 +++++++++++++++++++- 1 file changed, 19 insertions(+), 1 deletion(-) diff --git a/manual/configure_rockbox/sound_settings.tex b/manual/configure_rockbox/sound_settings.tex index 6a7d423113..c24b38a891 100644 --- a/manual/configure_rockbox/sound_settings.tex +++ b/manual/configure_rockbox/sound_settings.tex @@ -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. +} \ No newline at end of file