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author | Solomon Peachy <pizza@shaftnet.org> | 2020-07-26 08:56:22 -0400 |
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committer | Solomon Peachy <pizza@shaftnet.org> | 2020-07-27 13:10:27 -0400 |
commit | c81e1e1bf1addf05af62d14047fad3a3cfb4c76c (patch) | |
tree | 7c2dc80dec411e1d961803e8b999921e8e05e56f /manual/configure_rockbox/sound_settings.tex | |
parent | aee6459d7fee84074dc3f0a12e7b1ba6132ba9bd (diff) | |
download | rockbox-c81e1e1bf1addf05af62d14047fad3a3cfb4c76c.tar.gz rockbox-c81e1e1bf1addf05af62d14047fad3a3cfb4c76c.zip |
manual: Strip out a few more archos-specific chunks
Change-Id: If875fc86888491d8b26d9090ae3ae778dc32aa31
Diffstat (limited to 'manual/configure_rockbox/sound_settings.tex')
-rw-r--r-- | manual/configure_rockbox/sound_settings.tex | 91 |
1 files changed, 0 insertions, 91 deletions
diff --git a/manual/configure_rockbox/sound_settings.tex b/manual/configure_rockbox/sound_settings.tex index fd5efa189b..c87d52322e 100644 --- a/manual/configure_rockbox/sound_settings.tex +++ b/manual/configure_rockbox/sound_settings.tex | |||
@@ -38,8 +38,6 @@ change to customise your listening experience. | |||
38 | \nopt{iriverh100,iriverh300}{or suppresses} | 38 | \nopt{iriverh100,iriverh300}{or suppresses} |
39 | the lower (bass) frequencies in the sound. A value of 0~dB means that bass | 39 | the lower (bass) frequencies in the sound. A value of 0~dB means that bass |
40 | sounds are unaltered (flat response). | 40 | sounds are unaltered (flat response). |
41 | \opt{masd}{The minimum setting is -15~dB and the maximum is 15~dB.}% | ||
42 | \opt{masf}{The minimum setting is -12~dB and the maximum is 12~dB.}% | ||
43 | \opt{iriverh100,iriverh300}{The minimum setting is 0~dB and the maximum is 24~dB.}% | 41 | \opt{iriverh100,iriverh300}{The minimum setting is 0~dB and the maximum is 24~dB.}% |
44 | \opt{ipodnano,ipodnano2g,ipodcolor,mpiohd200}{% | 42 | \opt{ipodnano,ipodnano2g,ipodcolor,mpiohd200}{% |
45 | The minimum setting is -6~dB and the maximum is 9~dB.}% | 43 | The minimum setting is -6~dB and the maximum is 9~dB.}% |
@@ -66,8 +64,6 @@ change to customise your listening experience. | |||
66 | \nopt{iriverh100,iriverh300}{or suppresses} | 64 | \nopt{iriverh100,iriverh300}{or suppresses} |
67 | the higher (treble) frequencies in the sound. A value of 0~dB means that | 65 | the higher (treble) frequencies in the sound. A value of 0~dB means that |
68 | treble sounds are unaltered (flat response). | 66 | treble sounds are unaltered (flat response). |
69 | \opt{masd}{The minimum setting is -15~dB and the maximum is 15~dB.}% | ||
70 | \opt{masf}{The minimum setting is -12~dB and the maximum is 12~dB.}% | ||
71 | \opt{iriverh100,iriverh300}{The minimum setting is 0~dB and the maximum is 6~dB.}% | 67 | \opt{iriverh100,iriverh300}{The minimum setting is 0~dB and the maximum is 6~dB.}% |
72 | \opt{ipodnano,ipodnano2g,ipodcolor,mpiohd200}{% | 68 | \opt{ipodnano,ipodnano2g,ipodcolor,mpiohd200}{% |
73 | The minimum setting is -6~dB and the maximum is 9~dB.}% | 69 | The minimum setting is -6~dB and the maximum is 9~dB.}% |
@@ -201,93 +197,6 @@ change to customise your listening experience. | |||
201 | }% | 197 | }% |
202 | } | 198 | } |
203 | 199 | ||
204 | \opt{masf}{ | ||
205 | \section{Loudness} | ||
206 | When listening at low volumes, the ear will tend to make bass and treble | ||
207 | frequencies sound quieter than they really are. To compensate for this, | ||
208 | \setting{Loudness} is an effect which emphasises bass and treble in a fashion | ||
209 | suited to the human ear. Frequencies in the vocal range are unaffected, since | ||
210 | the human ear picks these up very easily at any sound level. | ||
211 | It is of course also possible to use this effect at higher volumes for | ||
212 | enhanced bass and treble. | ||
213 | } | ||
214 | |||
215 | \opt{masf}{ | ||
216 | \section{Auto Volume} | ||
217 | Auto volume is a feature that automatically lowers the volume on loud parts, | ||
218 | and then slowly restores the volume to the previous level over a time | ||
219 | interval. This setting allows this time interval to be configured. Short | ||
220 | values like 20~ms are useful for ensuring a constant volume for in-car use and | ||
221 | other applications where background noise makes a constant loudness desirable. | ||
222 | A longer timeout means that the change in volume back to the previous level | ||
223 | will be smoother, so there will be fewer sharp changes in volume level. | ||
224 | } | ||
225 | |||
226 | \opt{masf}{ | ||
227 | \section{Super Bass} | ||
228 | This setting changes the threshold at which bass frequencies are affected by | ||
229 | the \setting{Loudness} setting, making the sound of drums and bass guitar | ||
230 | louder in comparison to the rest of the sound. This setting only has an | ||
231 | effect if \setting{Loudness} is set to a value larger than 0~dB. | ||
232 | } | ||
233 | |||
234 | \opt{masf}{ | ||
235 | \section{MDB {}-- Micronas Dynamic Bass} | ||
236 | The rest of the parameters in this menu relate to the Micronas Dynamic | ||
237 | Bass (MDB) function. MDB is designed to enable the user to hear bass | ||
238 | notes that the headphones and/or speakers are not capable of reproducing. | ||
239 | Every tone has a fundamental frequency (the ``main tone'') and also several | ||
240 | harmonics, which are related to that tone. The human brain has a mechanism | ||
241 | whereby it can actually infer the presence of bass notes from the higher | ||
242 | harmonics that they would generate. | ||
243 | |||
244 | The practical upshot of this is that MDB produces a more authentic sounding | ||
245 | bass by tricking the brain into believing it is hearing tones that the | ||
246 | headphones or speakers are not capable of reproducing. | ||
247 | |||
248 | The MDB parameters are as follows: | ||
249 | % | ||
250 | \begin{description} | ||
251 | \item[MDB enable.] | ||
252 | This turns the MDB feature on or off. For many users this will be the | ||
253 | only setting they need, since Rockbox picks sensible defaults for the | ||
254 | other parameters. MDB is turned off by default. | ||
255 | \item[MDB strength.] | ||
256 | How loud the harmonics generated by MDB will be. | ||
257 | \item[MDB Harmonics.] | ||
258 | The percentage of the low notes that is converted into harmonics. | ||
259 | If low notes are causing speaker distortion, this can be set to 100\% | ||
260 | to eliminate the fundamental completely and only produce harmonics in the | ||
261 | signal. If set to 0\% this is the same as turning the MDB feature off. | ||
262 | \item[MDB Centre Frequency.] | ||
263 | The cutoff frequency of your headphones or speakers. This is usually | ||
264 | given in the specification for the headphones/speakers. | ||
265 | \item[MDB shape.] | ||
266 | It is recommended that this parameter be set to 1.5 times the centre frequency. | ||
267 | |||
268 | This is the frequency up to which harmonics are generated. Some of the | ||
269 | lower fundamentals near the cut{}-off range will have their lower | ||
270 | harmonics cut, since they will be below the range of the speakers. | ||
271 | Fundamentals between the cut{}-off frequency and the lower frequency | ||
272 | will have their harmonics proportionally boosted to compensate and restore | ||
273 | the `loudness' of these notes. | ||
274 | |||
275 | For most users, the defaults should provide an improvement in sound | ||
276 | quality and can be safely left as they are. For reference, the defaults | ||
277 | Rockbox uses are: | ||
278 | % | ||
279 | \begin{table}[h!] | ||
280 | \begin{rbtabular}{0.5\textwidth}{Xc}{Setting & Value}{}{} | ||
281 | MDB Strength & 50~dB \\ | ||
282 | MDB Harmonics & 48\% \\ | ||
283 | MDB Centre Frequency & 60~Hz \\ | ||
284 | MDB Shape & 90~Hz \\ | ||
285 | \end{rbtabular} | ||
286 | \end{table} | ||
287 | |||
288 | \end{description} | ||
289 | } | ||
290 | |||
291 | \opt{swcodec}{ | 200 | \opt{swcodec}{ |
292 | \section{Crossfeed} | 201 | \section{Crossfeed} |
293 | Crossfeed attempts to make the experience of listening to music on | 202 | Crossfeed attempts to make the experience of listening to music on |