From c81e1e1bf1addf05af62d14047fad3a3cfb4c76c Mon Sep 17 00:00:00 2001 From: Solomon Peachy Date: Sun, 26 Jul 2020 08:56:22 -0400 Subject: manual: Strip out a few more archos-specific chunks Change-Id: If875fc86888491d8b26d9090ae3ae778dc32aa31 --- manual/configure_rockbox/sound_settings.tex | 91 ----------------------------- 1 file changed, 91 deletions(-) (limited to 'manual/configure_rockbox/sound_settings.tex') diff --git a/manual/configure_rockbox/sound_settings.tex b/manual/configure_rockbox/sound_settings.tex index fd5efa189b..c87d52322e 100644 --- a/manual/configure_rockbox/sound_settings.tex +++ b/manual/configure_rockbox/sound_settings.tex @@ -38,8 +38,6 @@ change to customise your listening experience. \nopt{iriverh100,iriverh300}{or suppresses} the lower (bass) frequencies in the sound. A value of 0~dB means that bass sounds are unaltered (flat response). - \opt{masd}{The minimum setting is -15~dB and the maximum is 15~dB.}% - \opt{masf}{The minimum setting is -12~dB and the maximum is 12~dB.}% \opt{iriverh100,iriverh300}{The minimum setting is 0~dB and the maximum is 24~dB.}% \opt{ipodnano,ipodnano2g,ipodcolor,mpiohd200}{% The minimum setting is -6~dB and the maximum is 9~dB.}% @@ -66,8 +64,6 @@ change to customise your listening experience. \nopt{iriverh100,iriverh300}{or suppresses} the higher (treble) frequencies in the sound. A value of 0~dB means that treble sounds are unaltered (flat response). - \opt{masd}{The minimum setting is -15~dB and the maximum is 15~dB.}% - \opt{masf}{The minimum setting is -12~dB and the maximum is 12~dB.}% \opt{iriverh100,iriverh300}{The minimum setting is 0~dB and the maximum is 6~dB.}% \opt{ipodnano,ipodnano2g,ipodcolor,mpiohd200}{% The minimum setting is -6~dB and the maximum is 9~dB.}% @@ -201,93 +197,6 @@ change to customise your listening experience. }% } -\opt{masf}{ - \section{Loudness} - When listening at low volumes, the ear will tend to make bass and treble - frequencies sound quieter than they really are. To compensate for this, - \setting{Loudness} is an effect which emphasises bass and treble in a fashion - suited to the human ear. Frequencies in the vocal range are unaffected, since - the human ear picks these up very easily at any sound level. - It is of course also possible to use this effect at higher volumes for - enhanced bass and treble. -} - -\opt{masf}{ -\section{Auto Volume} - Auto volume is a feature that automatically lowers the volume on loud parts, - and then slowly restores the volume to the previous level over a time - interval. This setting allows this time interval to be configured. Short - values like 20~ms are useful for ensuring a constant volume for in-car use and - other applications where background noise makes a constant loudness desirable. - A longer timeout means that the change in volume back to the previous level - will be smoother, so there will be fewer sharp changes in volume level. -} - -\opt{masf}{ -\section{Super Bass} - This setting changes the threshold at which bass frequencies are affected by - the \setting{Loudness} setting, making the sound of drums and bass guitar - louder in comparison to the rest of the sound. This setting only has an - effect if \setting{Loudness} is set to a value larger than 0~dB. -} - -\opt{masf}{ -\section{MDB {}-- Micronas Dynamic Bass} - The rest of the parameters in this menu relate to the Micronas Dynamic - Bass (MDB) function. MDB is designed to enable the user to hear bass - notes that the headphones and/or speakers are not capable of reproducing. - Every tone has a fundamental frequency (the ``main tone'') and also several - harmonics, which are related to that tone. The human brain has a mechanism - whereby it can actually infer the presence of bass notes from the higher - harmonics that they would generate. - - The practical upshot of this is that MDB produces a more authentic sounding - bass by tricking the brain into believing it is hearing tones that the - headphones or speakers are not capable of reproducing. - - The MDB parameters are as follows: - % - \begin{description} - \item[MDB enable.] - This turns the MDB feature on or off. For many users this will be the - only setting they need, since Rockbox picks sensible defaults for the - other parameters. MDB is turned off by default. - \item[MDB strength.] - How loud the harmonics generated by MDB will be. - \item[MDB Harmonics.] - The percentage of the low notes that is converted into harmonics. - If low notes are causing speaker distortion, this can be set to 100\% - to eliminate the fundamental completely and only produce harmonics in the - signal. If set to 0\% this is the same as turning the MDB feature off. - \item[MDB Centre Frequency.] - The cutoff frequency of your headphones or speakers. This is usually - given in the specification for the headphones/speakers. - \item[MDB shape.] - It is recommended that this parameter be set to 1.5 times the centre frequency. - - This is the frequency up to which harmonics are generated. Some of the - lower fundamentals near the cut{}-off range will have their lower - harmonics cut, since they will be below the range of the speakers. - Fundamentals between the cut{}-off frequency and the lower frequency - will have their harmonics proportionally boosted to compensate and restore - the `loudness' of these notes. - - For most users, the defaults should provide an improvement in sound - quality and can be safely left as they are. For reference, the defaults - Rockbox uses are: - % - \begin{table}[h!] - \begin{rbtabular}{0.5\textwidth}{Xc}{Setting & Value}{}{} - MDB Strength & 50~dB \\ - MDB Harmonics & 48\% \\ - MDB Centre Frequency & 60~Hz \\ - MDB Shape & 90~Hz \\ - \end{rbtabular} - \end{table} - - \end{description} -} - \opt{swcodec}{ \section{Crossfeed} Crossfeed attempts to make the experience of listening to music on -- cgit v1.2.2