perceptual bass enhancement
- a bbe-ish group delay corrction with Biophonic EQ boost.
- precut
auditory fatigue reduction
-reduce signal in frequency that may trigger temporary threshold shift
haas surround
-frequency between f(x1) and f(x2) is always bypassed.
-can apply to side only.
Change-Id: Icb6355ce9b1c99bf2c58c9385c3c411c0ae209d3
Add a "volume limit" parameter to the configuration file. The maximum
value of volume setting in sound menu will be limited to the same as
volume limit. Also each time when setvol() is excuted, Rockbox will
check if the global_settings.volume value larger than
global_settings.volume_limit. If larger, take the value of volume_limit
instead. The volume_limit argument shares the same maximum and minimum values
with volume argument, while taking the maximum volume as its default value.
Change-Id: I8ca9bc6ea6e617b48fc346aae5f2a0a1d259ae36
Reviewed-on: http://gerrit.rockbox.org/697
Reviewed-by: Jonathan Gordon <rockbox@jdgordon.info>
This is an improvement to the current compressor which I have added
to my own Sansa Fuze V2 build. I am submitting here in case others
find it interesting.
Features added to the existing compressor:
Attack, Look-ahead, Sidechain Filtering.
Exponential attack and release characteristic response.
Benefits from adding missing features:
Attack:
Preserve perceived "brightness" of tone by letting onset transients
come through at a higher level than the rest of the compressed program
material.
Look-ahead:
With Attack comes clipping on the leading several cycles of a transient
onset. With look-ahead function, this can be pre-emptively mitigated with
a slower gain change (less distortion). Look-ahead limiting is implemented
to prevent clipping while keeping gain change ramp to an interval near 3ms
instead of instant attack.
The existing compressor implementation distorts the leading edge of a
transient by causing instant gain change, resulting in log() distortion.
This sounds "woofy" to me.
Exponential Attack/Release:
eMore natural sounding. On attack, this is a true straight line of 10dB per
attack interval. Release is a little different, however, sounds natural as
an analog compressor.
Sidechain Filtering:
Mild high-pass filter reduces response to low frequency onsets. For example,
a hard kick drum is less likely to make the whole of the program material
appear to fade in and out. Combined with a moderate attack time, such a
transient will ride through with minimal audible artifact.
Overall these changes make dynamic music sound more "open", more natural. The
goal of a compressor is to make dyanamic music sound louder without necessarily
sounding as though it has been compressed. I believe these changes come closer to this goal.
Enjoy. If not, I am enjoying it
Change-Id: I664eace546c364b815b4dc9ed4a72849231a0eb2
Reviewed-on: http://gerrit.rockbox.org/626
Tested: Purling Nayuki <cyq.yzfl@gmail.com>
Reviewed-by: Michael Giacomelli <giac2000@hotmail.com>
Also move the definition to config.h
Change-Id: I36bb5020c5e06b2344292bc05e8c13ccc7a6a1ff
Reviewed-on: http://gerrit.rockbox.org/234
Reviewed-by: Nils Wallménius <nils@rockbox.org>
a bool to appear the same as the old API. Possibly fixes some bugs, but
doubtful.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12772 a1c6a512-1295-4272-9138-f99709370657
Icons are now used by their id which must be part of the icons_6x8 enum,
or Icon_NOICON for none
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12571 a1c6a512-1295-4272-9138-f99709370657
Blind users: get a new voice file as there are lots of lang changes and new strings.
FS#6630 or RootMenu on the wiki for more info. complaints to /dev/null :)
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12528 a1c6a512-1295-4272-9138-f99709370657
Any menus which dont yet show them are not converted to the new system.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12300 a1c6a512-1295-4272-9138-f99709370657
Remove apps/recording_settings_menu.c which should never have been
commited
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12293 a1c6a512-1295-4272-9138-f99709370657
