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Diffstat (limited to 'manual/configure_rockbox/sound_settings.tex')
-rwxr-xr-x | manual/configure_rockbox/sound_settings.tex | 161 |
1 files changed, 126 insertions, 35 deletions
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. | |||
253 | Rockbox features a parametric equalizer. As the name suggests, a parametric | 253 | Rockbox features a parametric equalizer. As the name suggests, a parametric |
254 | equalizer lets you control several different parameters for each band of the | 254 | equalizer lets you control several different parameters for each band of the |
255 | equalizer. Rockbox's parametric EQ is composed of five different EQ bands: | 255 | equalizer. Rockbox's parametric EQ is composed of five different EQ bands: |
256 | \begin{description} | 256 | |
257 | \item[Band 0: Low shelf filter.] A low shelf filter boosts or lowers all | 257 | \begin{table} |
258 | frequencies below the designated cutoff point. The ``bass''control on | 258 | \begin{center} |
259 | most home or car stereos is an example of a low shelf filter. The low shelf | 259 | \begin{tabularx}{\textwidth}{lX}\toprule |
260 | filter in Rockbox is more flexible than a simple ``bass'' control, because | 260 | \textbf{EQ Band(s)} & \textbf{Description} \\\midrule |
261 | a simple bass control only lets you adjust the amount of gain that is | 261 | Band 0: Low shelf filter |
262 | applied. Rockbox lets you control the amount of gain that is applied | 262 | & A low shelf filter boosts or lowers all frequencies below the |
263 | (i.e., the amount that the bass is boosted or cut) too, but Rockbox also | 263 | designated cutoff point. The ``bass''control on most home or car |
264 | allows you to adjust the ``cutoff'' frequency where the shelving starts | 264 | stereos is an example of a low shelf filter. The low shelf |
265 | to take effect. For example, a cutoff frequency of 50 Hz will adjust only | 265 | filter in Rockbox is more flexible than a simple ``bass'' |
266 | very low frequencies. A cutoff frequency of 200 Hz, on the other hand, | 266 | control, because a simple bass control only lets you adjust |
267 | will adjust a much wider range of bass frequencies. | 267 | the amount of gain that is applied. Rockbox lets you control |
268 | \item[Bands 1-3: Peaking filters.] | 268 | the amount of gain that is applied (i.e., the amount that the |
269 | Peaking EQ filters boost or low a center frequency that you select, as | 269 | bass is boosted or cut) too, but Rockbox also allows you to |
270 | well as the frequencies within a certain distance of that center. Graphic | 270 | adjust the ``cutoff'' frequency where the shelving starts to take |
271 | equalizers in home stereos are usually peaking filters. The peaking EQs | 271 | effect. For example, a cutoff frequency of 50 Hz will adjust only very |
272 | on Rockbox's parametric equalizer let you adjust three different | 272 | low frequencies. A cutoff frequency of 200 Hz, on the other hand, will |
273 | parameters for each EQ band 1 through 3. The ``center'' parameter | 273 | adjust a much wider range of bass frequencies.. \\ |
274 | controls the center frequency that is adjusted by that EQ band. The | 274 | % |
275 | ``gain'' parameter controls how much each band is adjusted. Positive | 275 | Bands 1-3: Peaking filters |
276 | numbers make the EQ band louder, while negative numbers make that EQ band | 276 | & Peaking EQ filters boost or low a center frequency that you select, |
277 | quieter. Finally, the ``Q'' parameter controls how wide or narrow each EQ | 277 | as well as the frequencies within a certain distance of that |
278 | band is. Higher Q values will affect a narrow band of frequencies, while | 278 | center. Graphic equalizers in home stereos are usually peaking |
279 | lower EQ values will affect a wider band of frequencies. | 279 | filters. The peaking EQs on Rockbox's parametric equalizer let |
280 | \item[Band 4: High shelf filter.] | 280 | you adjust three different parameters for each EQ band 1 |
281 | A high shelf filter boosts or lowers all frequencies above a designated | 281 | through 3. The ``center'' parameter controls the center |
282 | cutoff point. The ``treble'' control on most home or car stereos is an | 282 | frequency that is adjusted by that EQ band. The ``gain'' |
283 | example of a high shelf filter. The high shelf filter is adjusted the | 283 | parameter controls how much each band is adjusted. Positive |
284 | same way as the low shelf filter, except that it works on the high end | 284 | numbers make the EQ band louder, while negative numbers make |
285 | of the frequency spectrum rather than the low end. | 285 | that EQ band quieter. Finally, the ``Q'' parameter controls how wide |
286 | \end{description} | 286 | or narrow each EQ band is. Higher Q values will affect a |
287 | 287 | narrow band of frequencies, while lower EQ values will affect | |
288 | a wider band of frequencies. \\ | ||
289 | % | ||
290 | Band 4: Hi shelf filter | ||
291 | & A high shelf filter boosts or lowers all frequencies above a | ||
292 | designated cutoff point. The ``treble'' control on most home or car | ||
293 | stereos is an example of a high shelf filter. The high shelf filter is | ||
294 | adjusted the same way as the low shelf filter, except that it works on | ||
295 | the high end of the frequency spectrum rather than the low end.\\ | ||
296 | \bottomrule | ||
297 | \end{tabularx} | ||
298 | \end{center} | ||
299 | \end{table} | ||
300 | |||
288 | So, as a general guide, EQ band 0 should be used for lows, EQ bands 1 | 301 | So, as a general guide, EQ band 0 should be used for lows, EQ bands 1 |
289 | through 3 should be used for mids, and EQ band 4 should be used for highs. | 302 | through 3 should be used for mids, and EQ band 4 should be used for highs. |
290 | You can find more information about setting the parametric equalizer and | 303 | |
291 | using equalizer presets in the Advanced Topics chapter of this manual. | 304 | \begin {description} |
292 | \fixme{This information is not yet added} | 305 | \item[Enable EQ:] |
306 | This option controls whether the EQ is on or off. | ||
307 | |||
308 | \item[Graphical EQ:] | ||
309 | This option brings up a graphic EQ screen, which allows adjustment of each of | ||
310 | the three parameters described above (gain, center frequency, and Q) for each | ||
311 | of the five EQ bands. | ||
312 | |||
313 | \begin{table} | ||
314 | \begin{btnmap}{}{} | ||
315 | \opt{IPOD_4G_PAD,IPOD_3G_PAD,IPOD_VIDEO_PAD}{\ButtonScrollFwd} | ||
316 | \opt{IRIVER_H100_PAD,IRIVER_H300_PAD,IAUDIO_X5_PAD}{\ButtonUp} | ||
317 | & Raises the highlighted parameter.\\ | ||
318 | % | ||
319 | \opt{IPOD_4G_PAD,IPOD_3G_PAD,IPOD_VIDEO_PAD}{\ButtonScrollBack} | ||
320 | \opt{IRIVER_H100_PAD,IRIVER_H300_PAD,IAUDIO_X5_PAD}{\ButtonDown} | ||
321 | & Lowers the highlighted parameter.\\ | ||
322 | % | ||
323 | \opt{IRIVER_H100_PAD,IRIVER_H300_PAD,IAUDIO_X5_PAD}{\ButtonLeft} | ||
324 | \opt{IPOD_4G_PAD,IPOD_3G_PAD,IPOD_VIDEO_PAD}{\ButtonLeft} | ||
325 | & Moves to the previous EQ band. \\ | ||
326 | % | ||
327 | \opt{IRIVER_H100_PAD,IRIVER_H300_PAD,IAUDIO_X5_PAD}{\ButtonRight} | ||
328 | \opt{IPOD_4G_PAD,IPOD_3G_PAD,IPOD_VIDEO_PAD}{\ButtonRight} | ||
329 | & Moves to the next EQ band. \\ | ||
330 | % | ||
331 | \opt{IRIVER_H100_PAD,IRIVER_H300_PAD}{\ButtonSelect} | ||
332 | \opt{IAUDIO_X5_PAD,IPOD_4G_PAD,IPOD_3G_PAD,IPOD_VIDEO_PAD}{\ButtonSelect} | ||
333 | & Toggles the cursor among the three parameters (gain, center frequency, | ||
334 | Q) for the selected EQ band.\\ | ||
335 | % | ||
336 | \opt{IRIVER_H100_PAD,IRIVER_H300_PAD}{\ButtonMode} | ||
337 | \opt{IPOD_4G_PAD,IPOD_3G_PAD,IPOD_VIDEO_PAD}{\ButtonMenu} | ||
338 | & Exits the graphic EQ screen.\\ | ||
339 | \end{btnmap} | ||
340 | \end{table} | ||
341 | |||
342 | \item[Pre-cut:] | ||
343 | If too much gain is added through the graphical EQ, your music may distort. | ||
344 | The \setting{Precut} setting allows you to adjust the overall gain of the EQ. | ||
345 | If your music distorts when using the EQ, trying changing this setting to a | ||
346 | negative value. | ||
347 | |||
348 | \item[Simple EQ:] | ||
349 | This option provides an easier alternative for those who are daunted by all of | ||
350 | the parameters that can be adjusted using the graphical EQ. With the | ||
351 | \setting{Simple EQ}, the only parameter that can be adjusted is the gain. | ||
352 | |||
353 | \item[Advanced EQ:] | ||
354 | This submenu provides options for adjusting the same parameters as the | ||
355 | \setting{Graphical EQ}. The only difference is that the parameters are | ||
356 | adjusted through textual menus rather than through a graphic interface. | ||
357 | |||
358 | \item[Save EQ Preset:] | ||
359 | This option saves the current EQ configuration in a \fname{.cfg} file. | ||
360 | |||
361 | \item[Browse EQ Presets:] | ||
362 | This menu displays a list EQ presets, as well as any EQ configurations saved | ||
363 | using the \setting{Save EQ Preset} option. Users unfamiliar with the | ||
364 | operation of a parametric EQ may wish to use the presets instead of trying to | ||
365 | configure the EQ, or use the presets for designing their own custom EQ | ||
366 | settings. | ||
367 | |||
368 | \end{description} | ||
369 | } | ||
370 | |||
371 | \opt{ipodvideo}{ | ||
372 | \section{Hardware EQ} | ||
373 | |||
374 | This function controls the EQ that is built into the hardware of your | ||
375 | \playerman{}. The hardware EQ functions similarly to the Graphical EQ in that | ||
376 | it allows adjustmnet of several parameters. However, unlike the Graphical EQ, | ||
377 | the Hardware EQ allows the user to choose from a limited number of settings | ||
378 | for ``Center Frequency'' and ``Bandwidth'' (``Bandwidth'' in the Hardware EQ | ||
379 | is similar to ``Q'' in the Graphical EQ). | ||
380 | |||
381 | \note{While the \setting{Hardware EQ} menu shows Low Shelf, three peaking | ||
382 | filters, and High Shelf, the peaking filters are not currently operational.} | ||
383 | |||
293 | } | 384 | } |