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-rw-r--r-- | manual/configure_rockbox/images/Q_factor.png | bin | 0 -> 9394 bytes | |||
-rw-r--r-- | manual/configure_rockbox/sound_settings.tex | 29 |
2 files changed, 22 insertions, 7 deletions
diff --git a/manual/configure_rockbox/images/Q_factor.png b/manual/configure_rockbox/images/Q_factor.png new file mode 100644 index 0000000000..1d5954a1dc --- /dev/null +++ b/manual/configure_rockbox/images/Q_factor.png | |||
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diff --git a/manual/configure_rockbox/sound_settings.tex b/manual/configure_rockbox/sound_settings.tex index 7022315c83..1bfbb2311a 100644 --- a/manual/configure_rockbox/sound_settings.tex +++ b/manual/configure_rockbox/sound_settings.tex | |||
@@ -333,13 +333,28 @@ change to customise your listening experience. | |||
333 | \opt{swcodec}{ | 333 | \opt{swcodec}{ |
334 | \section{\label{ref:EQ}Equalizer} | 334 | \section{\label{ref:EQ}Equalizer} |
335 | \screenshot{configure_rockbox/images/ss-equalizer}{The graphical equalizer}{} | 335 | \screenshot{configure_rockbox/images/ss-equalizer}{The graphical equalizer}{} |
336 | Rockbox features a parametric equalizer (EQ). As the name suggests, a | 336 | Rockbox features a parametric equalizer (EQ). In contrast to non-parametric |
337 | parametric EQ lets you control several different parameters for each | 337 | equalizers, a parametric EQ enables adjusting the center frequency, gain, and |
338 | band of the EQ. \nopt{gigabeats}{In some ways the EQ is similar to the | 338 | width of EQ bands separately. The ability to adjust the frequency and width |
339 | of bands enables more precise control of the EQ frequency response while | ||
340 | avoiding the use of a large number of bands (often 12+) needed in a | ||
341 | non-parametric EQ. | ||
342 | |||
343 | The graphic below illustrates how the width of 10kHz band can be adjusted to | ||
344 | cover a wider (lower Q) or narrower (higher Q) range of frequencies. | ||
345 | |||
346 | \includegraphics[width=14cm]{configure_rockbox/images/Q_factor.png} | ||
347 | |||
348 | \nopt{gigabeats}{In some ways the EQ is similar to the | ||
339 | \setting{Bass} and \setting{Treble} settings described earlier, but the EQ | 349 | \setting{Bass} and \setting{Treble} settings described earlier, but the EQ |
340 | allows you to control the sound much more carefully.} \opt{gigabeats}{The EQ | 350 | allows you to control the sound much more carefully. Note that the parameteric |
341 | is similar to the \setting{Tone Controls} described above, but allows more | 351 | EQ bands will be applied in addition to any bass or treble tone controls. |
342 | delicate control.}\\ | 352 | } \opt{gigabeats}{The EQ is similar to the \setting{Tone Controls} described |
353 | above, but allows more delicate control.}\\ | ||
354 | |||
355 | \note{A maximum of 10 EQ bands are possible on most devices, but using more | ||
356 | than are required will waste battery and introduce additional rounding | ||
357 | noise. For best results, use the fewest number of bands required.} | ||
343 | 358 | ||
344 | Rockbox's parametric EQ is composed of five different bands: | 359 | Rockbox's parametric EQ is composed of five different bands: |
345 | \begin{description} | 360 | \begin{description} |
@@ -362,7 +377,7 @@ change to customise your listening experience. | |||
362 | centre frequency chosen. | 377 | centre frequency chosen. |
363 | Graphic equalizers in home stereos are usually peaking | 378 | Graphic equalizers in home stereos are usually peaking |
364 | filters. The peaking filters in Rockbox's EQ lets you adjust three | 379 | filters. The peaking filters in Rockbox's EQ lets you adjust three |
365 | different parameters for EQ bands 1 through 3. The ``centre'' parameter | 380 | different parameters for EQ bands 1 through 8. The ``centre'' parameter |
366 | controls the centre frequency of the frequency range that is affected | 381 | controls the centre frequency of the frequency range that is affected |
367 | as described above. | 382 | as described above. |
368 | The ``gain'' parameter controls how much each band is adjusted, and | 383 | The ``gain'' parameter controls how much each band is adjusted, and |