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-rw-r--r--manual/configure_rockbox/sound_settings.tex103
1 files changed, 48 insertions, 55 deletions
diff --git a/manual/configure_rockbox/sound_settings.tex b/manual/configure_rockbox/sound_settings.tex
index 4f286946ce..3049ffe98b 100644
--- a/manual/configure_rockbox/sound_settings.tex
+++ b/manual/configure_rockbox/sound_settings.tex
@@ -23,8 +23,7 @@ change to customise your listening experience.
23 \opt{ipodnano}{minimum of -72 dB to a maximum of +6 dB.}% 23 \opt{ipodnano}{minimum of -72 dB to a maximum of +6 dB.}%
24 \opt{ipodvideo}{minimum of -57 dB to a maximum of +6 dB.}% 24 \opt{ipodvideo}{minimum of -57 dB to a maximum of +6 dB.}%
25 \opt{x5}{minimum of -73 dB to a maximum of +6 dB.}% 25 \opt{x5}{minimum of -73 dB to a maximum of +6 dB.}%
26 \opt{ipodcolor}{minimum of -\fixme{??} dB to a maximum of +\fixme{??} dB.}% 26 \opt{ipodcolor,h10,h10_5gb,sansa}{minimum of -74 dB to a maximum of +6 db.}
27 \opt{h10,h10_5gb,sansa}{minimum of -74 dB to a maximum of +6 db.}
28 27
29\section{Bass} 28\section{Bass}
30 \opt{player,recorder,recorderv2fm,ondio}{This emphasises or suppresses the 29 \opt{player,recorder,recorderv2fm,ondio}{This emphasises or suppresses the
@@ -40,10 +39,9 @@ change to customise your listening experience.
40 \opt{ipodvideo}{This emphasises or suppresses the 39 \opt{ipodvideo}{This emphasises or suppresses the
41 lower frequency (bass) sounds in the track. 0dB means that bass in unaltered 40 lower frequency (bass) sounds in the track. 0dB means that bass in unaltered
42 (flat response). The minimum setting is -12dB and the maximum is 12dB.} 41 (flat response). The minimum setting is -12dB and the maximum is 12dB.}
43 \opt{x5}{This emphasises or suppresses the 42 \opt{x5,sansa,h10,h10_5gb}{This emphasises or suppresses the
44 lower frequency (bass) sounds in the track. 0dB means that bass in unaltered 43 lower frequency (bass) sounds in the track. 0dB means that bass in unaltered
45 (flat response). The minimum setting is -24dB and the maximum is 24dB.} 44 (flat response). The minimum setting is -24dB and the maximum is 24dB.}
46 \opt{sansa,h10,h10_5gb}{\fixme{add platform specific information here}}
47 45
48\opt{ipodvideo}{ 46\opt{ipodvideo}{
49\section{Bass Cutoff} 47\section{Bass Cutoff}
@@ -68,10 +66,9 @@ change to customise your listening experience.
68 \opt{ipodvideo}{This setting emphasises or suppresses 66 \opt{ipodvideo}{This setting emphasises or suppresses
69 the higher frequency (treble) sounds in the track. 0dB means that treble is 67 the higher frequency (treble) sounds in the track. 0dB means that treble is
70 unaltered (flat response). The minimum setting -12dB and the maximum is 12dB.} 68 unaltered (flat response). The minimum setting -12dB and the maximum is 12dB.}
71 \opt{x5}{This setting emphasises or suppresses 69 \opt{x5,sansa,h10,h10_5gb}{This setting emphasises or suppresses
72 the higher frequency (treble) sounds in the track. 0dB means that treble is 70 the higher frequency (treble) sounds in the track. 0dB means that treble is
73 unaltered (flat response). The minimum setting -24dB and the maximum is 24dB.} 71 unaltered (flat response). The minimum setting -24dB and the maximum is 24dB.}
74 \opt{sansa,h10,h10_5gb}{\fixme{add platform specific information here}}
75 72
76\opt{ipodvideo}{ 73\opt{ipodvideo}{
77\section{Treble Cutoff} 74\section{Treble Cutoff}
@@ -128,7 +125,7 @@ change to customise your listening experience.
128 125
129\section{Stereo Width} 126\section{Stereo Width}
130 Stereo width allows you to manually specify the effect that is applied 127 Stereo width allows you to manually specify the effect that is applied
131 when the \setting{Channels} setting is set to \setting{Custom}. 128 when the \setting{Channels} setting is set to ``custom''.
132 All values below 100\% will progressively mix the contents of one channel 129 All values below 100\% will progressively mix the contents of one channel
133 into the other. This has the effect of gradually centering the stereo image, 130 into the other. This has the effect of gradually centering the stereo image,
134 until you have monophonic sound at 0\%. Values above 100\% will progressively 131 until you have monophonic sound at 0\%. Values above 100\% will progressively
@@ -283,55 +280,51 @@ change to customise your listening experience.
283\opt{SWCODEC}{ 280\opt{SWCODEC}{
284\section{\label{ref:EQ}Equalizer} 281\section{\label{ref:EQ}Equalizer}
285 \screenshot{configure_rockbox/images/ss-equalizer}{The graphical equalizer}{} 282 \screenshot{configure_rockbox/images/ss-equalizer}{The graphical equalizer}{}
286 Rockbox features a parametric equalizer. As the name suggests, a parametric 283 Rockbox features a parametric equalizer (EQ). As the name suggests, a
287 equalizer lets you control several different parameters for each band of the 284 parametric EQ lets you control several different parameters for each
288 equalizer. Rockbox's parametric EQ is composed of five different EQ bands: 285 band of the EQ. In some ways the EQ is similar to the \setting{Bass}
286 and \setting{Treble} settings described earlier, but the EQ allows you to
287 control the sound much more carefully.
289 288
290 \begin{table} 289 Rockbox's parametric EQ is composed of five different bands:
291 \begin{center} 290 \begin{description}
292 \begin{tabularx}{\textwidth}{lX}\toprule 291 \item[Band 0: Low shelf filter]
293 \textbf{EQ Band(s)} & \textbf{Description} \\\midrule 292 The low shelf filter boosts or lowers all frequencies below a certain
294 Band 0: Low shelf filter 293 frequency limit, much like what a ``bass'' control found on ordinary
295 & A low shelf filter boosts or lowers all frequencies below the 294 stereo systems does.
296 designated cutoff point. The ``bass''control on most home or car 295 Adjust the ``cutoff'' frequency parameter to decide where the shelving
297 stereos is an example of a low shelf filter. The low shelf 296 starts to take effect. For example, a cutoff frequency of 50 Hz will
298 filter in Rockbox is more flexible than a simple ``bass'' 297 adjust only very low frequencies. A cutoff frequency of 200 Hz, on the
299 control, because a simple bass control only lets you adjust 298 other hand, will adjust a much wider range of bass frequencies.
300 the amount of gain that is applied. Rockbox lets you control 299 The ``gain'' parameter controls how much the loudness of the band is
301 the amount of gain that is applied (i.e., the amount that the 300 adjusted. Positive numbers make the EQ band louder, while negative
302 bass is boosted or cut) too, but Rockbox also allows you to 301 numbers make that EQ band quieter.
303 adjust the ``cutoff'' frequency where the shelving starts to take 302 The ``Q'' parameter should always be set to 0.7 for the shelving
304 effect. For example, a cutoff frequency of 50 Hz will adjust only very 303 filters. Higher values will add a small boost around the cutoff
305 low frequencies. A cutoff frequency of 200 Hz, on the other hand, will 304 frequency that is almost always undesirable.
306 adjust a much wider range of bass frequencies.\\ 305 \item[Bands 1-3: Peaking filters]
307 % 306 Peaking EQ filters boost or lower a frequency range centered at the
308 Bands 1-3: Peaking filters 307 center frequency chosen.
309 & Peaking EQ filters boost or low a center frequency that you select, 308 Graphic equalizers in home stereos are usually peaking
310 as well as the frequencies within a certain distance of that 309 filters. The peaking filters in Rockbox's EQ lets you adjust three
311 center. Graphic equalizers in home stereos are usually peaking 310 different parameters for EQ bands 1 through 3. The ``center'' parameter
312 filters. The peaking EQs on Rockbox's parametric equalizer let 311 controls the center frequency of the frequency range that is affected
313 you adjust three different parameters for each EQ band 1 312 as described above.
314 through 3. The ``center'' parameter controls the center 313 The ``gain'' parameter controls how much each band is adjusted, and
315 frequency that is adjusted by that EQ band. The ``gain'' 314 works as for the low shelf filter.
316 parameter controls how much each band is adjusted. Positive 315 Finally, the ``Q'' parameter controls how wide or narrow the affected
317 numbers make the EQ band louder, while negative numbers make 316 frequency range is. Higher Q values will affect a narrower band of
318 that EQ band quieter. Finally, the ``Q'' parameter controls how wide 317 frequencies, while lower Q values will affect a wider band of
319 or narrow each EQ band is. Higher Q values will affect a 318 frequencies.
320 narrow band of frequencies, while lower Q values will affect 319 \item[Band 4: High shelf filter]
321 a wider band of frequencies.\\ 320 A high shelf filter boosts or lowers all frequencies above a certain
322 % 321 frequency limit, much like what a ``treble'' control found on ordinary
323 Band 4: Hi shelf filter 322 stereo systems does.
324 & A high shelf filter boosts or lowers all frequencies above a 323 The high shelf filter is adjusted the same way as the low shelf filter,
325 designated cutoff point. The ``treble'' control on most home or car 324 except that it works on the high end of the frequency spectrum rather
326 stereos is an example of a high shelf filter. The high shelf filter is 325 than the low end.
327 adjusted the same way as the low shelf filter, except that it works on 326 \end{description}
328 the high end of the frequency spectrum rather than the low end.\\ 327 As a general guide, EQ band 0 should be used for lows, EQ bands 1
329 \bottomrule
330 \end{tabularx}
331 \end{center}
332 \end{table}
333
334 So, as a general guide, EQ band 0 should be used for lows, EQ bands 1
335 through 3 should be used for mids, and EQ band 4 should be used for highs. 328 through 3 should be used for mids, and EQ band 4 should be used for highs.
336 329
337\begin {description} 330\begin {description}