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author | Thom Johansen <thomj@rockbox.org> | 2007-12-13 01:11:26 +0000 |
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committer | Thom Johansen <thomj@rockbox.org> | 2007-12-13 01:11:26 +0000 |
commit | 42995a35155f957bda91a6a886e17af471f32066 (patch) | |
tree | 52a2780c1f4494c4924644b434d673a744fce298 /manual | |
parent | 8c68310995518ee2a12b7154383d796e5d939a20 (diff) | |
download | rockbox-42995a35155f957bda91a6a886e17af471f32066.tar.gz rockbox-42995a35155f957bda91a6a886e17af471f32066.zip |
Fill in some volume/bass/treble values for some targets. Shorten the EQ section a bit and stop using a table for describing the bands, since that wastes a ton of space.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15915 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'manual')
-rw-r--r-- | manual/configure_rockbox/sound_settings.tex | 103 |
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} |