User manual

Karaoke:
Karaoke:Karaoke:
Karaoke: Removes all sound that is the same in both channels. Since most
vocals are recorded in this way to make the artist sound central, this often
(but not always) has the effect of removing the voice track from a song.
Loudness
Loudness Loudness
Loudness (Recorder only)
(Recorder only)(Recorder only)
(Recorder only)
Loudness is an effect which emphasises bass and treble. This makes the track
seem louder by amplifying the frequencies that the human ear finds hard to
hear. Frequencies in the vocal range are unaffected, since the human ear
picks these up very easily.
Auto Volume
Auto Volume Auto Volume
Auto Volume (Recorder only)
(Recorder only)(Recorder only)
(Recorder only)
Auto volume is a feature that automatically lowers the volume on loud parts,
and then slowly restores the volume to the previous level over a time interval.
That time interval is configurable here. Short values like 20ms are useful for
ensuring a constant volume for in car use and other applications where
background noise makes a constant loudness desirable. A longer timeout
means that the change in volume back to the previous level will be smoother,
so there will be less sharp changes in volume level.
Super Bass
Super Bass Super Bass
Super Bass (Recorder Only)
(Recorder Only)(Recorder Only)
(Recorder Only)
This setting changes the threshold at which bass frequencies are affected by
the Loudness
LoudnessLoudness
Loudness setting, making the sound of drums and bass guitar louder in
comparison to the rest of the track. This setting only has an effect if Loudness
LoudnessLoudness
Loudness is
set to a value larger than 0dB.
MDB - Micronas Dynamic Bass
MDB - Micronas Dynamic Bass MDB - Micronas Dynamic Bass
MDB - Micronas Dynamic Bass (Recorder Only)
(Recorder Only)(Recorder Only)
(Recorder Only)
The rest of the parameters on this menu relate to the Micronas Dynamic Bass
(MDB) function. This is designed to enable the user to hear bass notes that the
headphones and/or speakers are not capable of reproducing. Every tone has
a fundamental frequency (the 'main tone') and also several harmonics, which
are related to that tone. The human brain has a mechanism whereby it can
actually infer the presence of bass notes from the higher harmonics that they
would generate.
The practical upshot of this is that MDB produces a more authentic sounding
bass by tricking the brain in believing it's hearing tones that the headphones or
speakers aren't capable of reproducing. Try it and see what you think.
The MDB parameters are as follows.
MDB enable:
MDB enable: MDB enable:
MDB enable: this turns the MDB feature on or off. For many users this will be
the only setting they need, since Rockbox picks sensible defaults for the other
parameters. MDB is turned off by default.
MDB strength:
MDB strength:MDB strength:
MDB strength: How loud the harmonics generated by the MDB will be.
32 Rockbox User Manual