Imagewerx wrote:
> By this do you mean I can only change from linear as it is now to
> logarithmic? I wouldn't mind keeping it linear,but changing it to say
> 0-30 for full volume rather than 0-100 if that's possible.
No - I said the table is not linear and perception of loudness is not
linear. Loudness is measured with a logarithmic scale but human
perception of loudness is not necessarily logarithmic.
It is up to you how you change the entries in the table.
The volume map from the file
Code:
--------------------
# The original Squeezebox2 firmware supported a fairly narrow volume range
# below unity gain - 129 levels on a linear scale represented by a 1.7
# fixed point number (no sign, 1 integer, 7 fractional bits).
# From FW 22 onwards, volume is sent as a 16.16 value (no sign, 16 integer,
# 16 fractional bits), significantly increasing our fractional range.
# Rather than test for the firmware level, we send both values in the
# volume message.
# We thought about sending a dB scale volume to the client, but decided
# against it. Sending a fixed point multiplier allows us to change
# the mapping of UI volume settings to gain as we want, without being
# constrained by any scale other than that of the fixed point range allowed
# by the client.
# Old style volume:
# we only have 129 levels to work with now, and within 100 range,
# that's pretty tight.
# this table is optimized for 40 steps (like we have in the current player UI.
my @volume_map = (
0, 1, 1, 1, 2, 2, 2, 3, 3, 4,
5, 5, 6, 6, 7, 8, 9, 9, 10, 11,
12, 13, 14, 15, 16, 16, 17, 18, 19, 20,
22, 23, 24, 25, 26, 27, 28, 29, 30, 32,
33, 34, 35, 37, 38, 39, 40, 42, 43, 44,
46, 47, 48, 50, 51, 53, 54, 56, 57, 59,
60, 61, 63, 65, 66, 68, 69, 71, 72, 74,
75, 77, 79, 80, 82, 84, 85, 87, 89, 90,
92, 94, 96, 97, 99, 101, 103, 104, 106, 108, 110,
112, 113, 115, 117, 119, 121, 123, 125, 127, 128
);
--------------------
------------------------------------------------------------------------
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