Toshiba Gigabeat F Series User Manual page 51

Chapter 6. Sound Settings
always be set to 0.7 for the shelving filters. Higher values will add a small boost
around the cutoff frequency that is almost always undesirable.
Bands 1-3: Peaking filters. Peaking EQ filters boost or lower a frequency range cen-
tered at the centre frequency chosen. Graphic equalizers in home stereos are usually
peaking filters. The peaking filters in Rockbox's EQ lets you adjust three different
parameters for EQ bands 1 through 3. The "centre" parameter controls the centre
frequency of the frequency range that is affected as described above. The "gain"
parameter controls how much each band is adjusted, and works as for the low shelf
filter. Finally, the "Q" parameter controls how wide or narrow the affected fre-
quency range is. Higher Q values will affect a narrower band of frequencies, while
lower Q values will affect a wider band of frequencies.
Band 4: High shelf filter. A high shelf filter boosts or lowers all frequencies above a cer-
tain frequency limit, much as the "treble" control found on ordinary stereo systems
does. The high shelf filter is adjusted the same way as the low shelf filter, except
that it works on the high end of the frequency spectrum rather than the low end.
As a general guide, EQ band 0 should be used for low frequencies, EQ bands 1 through
3 should be used for mids, and EQ band 4 should be used for highs.
Enable EQ. This option controls whether the EQ is on or off.
Graphical EQ. This option brings up a graphic EQ screen, which allows adjustment of
each of the three parameters described above (gain, centre frequency, and Q) for
each of the five EQ bands.
Key
Right
Left
Up
Down
Select
Power
Pre-cut. If too much gain is added through the graphical EQ, your music may distort.
The Precut setting allows you to adjust the overall gain of the EQ.
If your music distorts when using the EQ, trying changing this setting to a negative
value.
The Rockbox manual
Remote Key
Forward
Rewind
Volume Up
Volume Down
Play
Menu
Action
Raises the highlighted parameter.
Lowers the highlighted parameter.
Moves to the previous EQ band.
Moves to the next EQ band.
Toggles the cursor among the three pa-
rameters (gain, centre frequency, Q) for
the selected EQ band
Exits the graphic EQ screen.
Toshiba Gigabeat F and X Series
51