diff options
Diffstat (limited to 'firmware/drivers/as3514.c')
-rw-r--r-- | firmware/drivers/as3514.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/firmware/drivers/as3514.c b/firmware/drivers/as3514.c index 455c2f3320..7b6704e630 100644 --- a/firmware/drivers/as3514.c +++ b/firmware/drivers/as3514.c @@ -47,11 +47,11 @@ static void as3514_write(int reg, int value) /* convert tenth of dB volume to master volume register value */ int tenthdb2master(int db) { - /* +1..07 to -45.43dB in 1.5dB steps == 32 levels = 5 bits */ - /* 11111 == +1.07dB (0x1f) = 31) */ - /* 11110 == -0.43dB (0x1e) = 30) */ - /* 00001 == -43.93dB (0x01) */ - /* 00000 == -45.43dB (0x00) */ + /* +6 to -45.43dB in 1.5dB steps == 32 levels = 5 bits */ + /* 11111 == +6dB (0x1f) = 31) */ + /* 11110 == -4.5dB (0x1e) = 30) */ + /* 00001 == -39dB (0x01) */ + /* 00000 == -40.5dB (0x00) */ if (db < VOLUME_MIN) { return 0x0; |