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Diffstat (limited to 'manual/configure_rockbox/sound_settings.tex')
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diff --git a/manual/configure_rockbox/sound_settings.tex b/manual/configure_rockbox/sound_settings.tex index 79b0060153..31f3ce5adf 100755 --- a/manual/configure_rockbox/sound_settings.tex +++ b/manual/configure_rockbox/sound_settings.tex @@ -253,41 +253,132 @@ change to customize your listening experience. Rockbox features a parametric equalizer. As the name suggests, a parametric equalizer lets you control several different parameters for each band of the equalizer. Rockbox's parametric EQ is composed of five different EQ bands: - \begin{description} - \item[Band 0: Low shelf filter.] A low shelf filter boosts or lowers all - frequencies below the designated cutoff point. The ``bass''control on - most home or car stereos is an example of a low shelf filter. The low shelf - filter in Rockbox is more flexible than a simple ``bass'' control, because - a simple bass control only lets you adjust the amount of gain that is - applied. Rockbox lets you control the amount of gain that is applied - (i.e., the amount that the bass is boosted or cut) too, but Rockbox also - allows you to adjust the ``cutoff'' frequency where the shelving starts - to take effect. For example, a cutoff frequency of 50 Hz will adjust only - very low frequencies. A cutoff frequency of 200 Hz, on the other hand, - will adjust a much wider range of bass frequencies. - \item[Bands 1-3: Peaking filters.] - Peaking EQ filters boost or low a center frequency that you select, as - well as the frequencies within a certain distance of that center. Graphic - equalizers in home stereos are usually peaking filters. The peaking EQs - on Rockbox's parametric equalizer let you adjust three different - parameters for each EQ band 1 through 3. The ``center'' parameter - controls the center frequency that is adjusted by that EQ band. The - ``gain'' parameter controls how much each band is adjusted. Positive - numbers make the EQ band louder, while negative numbers make that EQ band - quieter. Finally, the ``Q'' parameter controls how wide or narrow each EQ - band is. Higher Q values will affect a narrow band of frequencies, while - lower EQ values will affect a wider band of frequencies. - \item[Band 4: High shelf filter.] - A high shelf filter boosts or lowers all frequencies above a designated - cutoff point. The ``treble'' control on most home or car stereos is an - example of a high shelf filter. The high shelf filter is adjusted the - same way as the low shelf filter, except that it works on the high end - of the frequency spectrum rather than the low end. - \end{description} - + + \begin{table} + \begin{center} + \begin{tabularx}{\textwidth}{lX}\toprule + \textbf{EQ Band(s)} & \textbf{Description} \\\midrule + Band 0: Low shelf filter + & A low shelf filter boosts or lowers all frequencies below the + designated cutoff point. The ``bass''control on most home or car + stereos is an example of a low shelf filter. The low shelf + filter in Rockbox is more flexible than a simple ``bass'' + control, because a simple bass control only lets you adjust + the amount of gain that is applied. Rockbox lets you control + the amount of gain that is applied (i.e., the amount that the + bass is boosted or cut) too, but Rockbox also allows you to + adjust the ``cutoff'' frequency where the shelving starts to take + effect. For example, a cutoff frequency of 50 Hz will adjust only very + low frequencies. A cutoff frequency of 200 Hz, on the other hand, will + adjust a much wider range of bass frequencies.. \\ + % + Bands 1-3: Peaking filters + & Peaking EQ filters boost or low a center frequency that you select, + as well as the frequencies within a certain distance of that + center. Graphic equalizers in home stereos are usually peaking + filters. The peaking EQs on Rockbox's parametric equalizer let + you adjust three different parameters for each EQ band 1 + through 3. The ``center'' parameter controls the center + frequency that is adjusted by that EQ band. The ``gain'' + parameter controls how much each band is adjusted. Positive + numbers make the EQ band louder, while negative numbers make + that EQ band quieter. Finally, the ``Q'' parameter controls how wide + or narrow each EQ band is. Higher Q values will affect a + narrow band of frequencies, while lower EQ values will affect + a wider band of frequencies. \\ + % + Band 4: Hi shelf filter + & A high shelf filter boosts or lowers all frequencies above a + designated cutoff point. The ``treble'' control on most home or car + stereos is an example of a high shelf filter. The high shelf filter is + adjusted the same way as the low shelf filter, except that it works on + the high end of the frequency spectrum rather than the low end.\\ + \bottomrule + \end{tabularx} + \end{center} + \end{table} + So, as a general guide, EQ band 0 should be used for lows, EQ bands 1 through 3 should be used for mids, and EQ band 4 should be used for highs. - You can find more information about setting the parametric equalizer and - using equalizer presets in the Advanced Topics chapter of this manual. - \fixme{This information is not yet added} + +\begin {description} + \item[Enable EQ:] + This option controls whether the EQ is on or off. + + \item[Graphical EQ:] + This option brings up a graphic EQ screen, which allows adjustment of each of + the three parameters described above (gain, center frequency, and Q) for each + of the five EQ bands. + + \begin{table} + \begin{btnmap}{}{} + \opt{IPOD_4G_PAD,IPOD_3G_PAD,IPOD_VIDEO_PAD}{\ButtonScrollFwd} + \opt{IRIVER_H100_PAD,IRIVER_H300_PAD,IAUDIO_X5_PAD}{\ButtonUp} + & Raises the highlighted parameter.\\ + % + \opt{IPOD_4G_PAD,IPOD_3G_PAD,IPOD_VIDEO_PAD}{\ButtonScrollBack} + \opt{IRIVER_H100_PAD,IRIVER_H300_PAD,IAUDIO_X5_PAD}{\ButtonDown} + & Lowers the highlighted parameter.\\ + % + \opt{IRIVER_H100_PAD,IRIVER_H300_PAD,IAUDIO_X5_PAD}{\ButtonLeft} + \opt{IPOD_4G_PAD,IPOD_3G_PAD,IPOD_VIDEO_PAD}{\ButtonLeft} + & Moves to the previous EQ band. \\ + % + \opt{IRIVER_H100_PAD,IRIVER_H300_PAD,IAUDIO_X5_PAD}{\ButtonRight} + \opt{IPOD_4G_PAD,IPOD_3G_PAD,IPOD_VIDEO_PAD}{\ButtonRight} + & Moves to the next EQ band. \\ + % + \opt{IRIVER_H100_PAD,IRIVER_H300_PAD}{\ButtonSelect} + \opt{IAUDIO_X5_PAD,IPOD_4G_PAD,IPOD_3G_PAD,IPOD_VIDEO_PAD}{\ButtonSelect} + & Toggles the cursor among the three parameters (gain, center frequency, + Q) for the selected EQ band.\\ + % + \opt{IRIVER_H100_PAD,IRIVER_H300_PAD}{\ButtonMode} + \opt{IPOD_4G_PAD,IPOD_3G_PAD,IPOD_VIDEO_PAD}{\ButtonMenu} + & Exits the graphic EQ screen.\\ + \end{btnmap} + \end{table} + + \item[Pre-cut:] + If too much gain is added through the graphical EQ, your music may distort. + The \setting{Precut} setting allows you to adjust the overall gain of the EQ. + If your music distorts when using the EQ, trying changing this setting to a + negative value. + + \item[Simple EQ:] + This option provides an easier alternative for those who are daunted by all of + the parameters that can be adjusted using the graphical EQ. With the + \setting{Simple EQ}, the only parameter that can be adjusted is the gain. + + \item[Advanced EQ:] + This submenu provides options for adjusting the same parameters as the + \setting{Graphical EQ}. The only difference is that the parameters are + adjusted through textual menus rather than through a graphic interface. + + \item[Save EQ Preset:] + This option saves the current EQ configuration in a \fname{.cfg} file. + + \item[Browse EQ Presets:] + This menu displays a list EQ presets, as well as any EQ configurations saved + using the \setting{Save EQ Preset} option. Users unfamiliar with the + operation of a parametric EQ may wish to use the presets instead of trying to + configure the EQ, or use the presets for designing their own custom EQ + settings. + +\end{description} +} + +\opt{ipodvideo}{ +\section{Hardware EQ} + + This function controls the EQ that is built into the hardware of your + \playerman{}. The hardware EQ functions similarly to the Graphical EQ in that + it allows adjustmnet of several parameters. However, unlike the Graphical EQ, + the Hardware EQ allows the user to choose from a limited number of settings + for ``Center Frequency'' and ``Bandwidth'' (``Bandwidth'' in the Hardware EQ + is similar to ``Q'' in the Graphical EQ). + + \note{While the \setting{Hardware EQ} menu shows Low Shelf, three peaking + filters, and High Shelf, the peaking filters are not currently operational.} + } |