diff options
author | Aidan MacDonald <amachronic@protonmail.com> | 2022-11-22 04:10:35 +0000 |
---|---|---|
committer | Aidan MacDonald <amachronic@protonmail.com> | 2023-01-22 21:19:57 +0000 |
commit | 5b27e2255a8bbb8645f089b8e721343bba5bd396 (patch) | |
tree | bd29ddf9d2a0c07b1541ad4bace7ff4aedcb3c14 /firmware/export | |
parent | 15c4447b6681cadba960aa9275592049afa96893 (diff) | |
download | rockbox-5b27e2255a8bbb8645f089b8e721343bba5bd396.tar.gz rockbox-5b27e2255a8bbb8645f089b8e721343bba5bd396.zip |
Add perceptual volume adjustment
The perceived loudness change of a change in volume depends
on the listening volume: at high volumes a 1 dB increment is
noticeable, but at low volumes a larger increment is needed
to get a comparable change in loudness.
Perceptual volume adjustment accounts for this fact, and
divides the hardware volume range into a number of steps.
Each step changes the dB volume by a variable amount, with
most of the steps concentrated at higher volumes. This
makes it possible to sweep over the entire hardware volume
range quickly, without losing the ability to finely adjust
the volume at normal listening levels.
Use "Volume Adjustment Mode" in the system settings menu
to select perceptual volume mode. The number of steps used
is controlled by "Number of Volume Steps". (Number of steps
has no effect in direct adjustment mode.)
It's still possible to set a specific dB volume level from
the sound settings menu when perceptual volume is enabled,
and perceptual volume does not affect the volume displayed
by themes.
Change-Id: I6f91fd3f7c5e2d323a914e47b5653033e92b4b3b
Diffstat (limited to 'firmware/export')
-rw-r--r-- | firmware/export/config.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/firmware/export/config.h b/firmware/export/config.h index 2ec0b7878f..0882cad61c 100644 --- a/firmware/export/config.h +++ b/firmware/export/config.h | |||
@@ -1319,6 +1319,10 @@ Lyre prototype 1 */ | |||
1319 | # define HAVE_SCREENDUMP | 1319 | # define HAVE_SCREENDUMP |
1320 | #endif | 1320 | #endif |
1321 | 1321 | ||
1322 | #if !defined(BOOTLOADER) && MEMORYSIZE > 2 | ||
1323 | # define HAVE_PERCEPTUAL_VOLUME | ||
1324 | #endif | ||
1325 | |||
1322 | /* null audiohw setting macro for when codec header is included for reasons | 1326 | /* null audiohw setting macro for when codec header is included for reasons |
1323 | other than audio support */ | 1327 | other than audio support */ |
1324 | #define AUDIOHW_SETTING(name, us, nd, st, minv, maxv, defv, expr...) | 1328 | #define AUDIOHW_SETTING(name, us, nd, st, minv, maxv, defv, expr...) |