My simple point of view about dBFS (full scale):
The full scale FS of a 16 bit soundcard is 2^15=32768, of a 24 bit
soundcard it is 2^23 = 8388608.
The dB number Y of a value X represents a relation to the full scale:
Y [dBFS] = 20*Log10(X/FS)
So with X=32786 and a 16 bit soundcard you get Y =
Most people seem to be overthinking this, Uli has posted the important equation
here:
Y [dBFS] = 20*Log10(X/FS)
That is all you need for converting normalised peak values to dbFS.
-Original Message-
From: music-dsp-boun...@music.columbia.edu
If we're overthinking it, it's probably because we're not sure what Linda's
after. I'm sure she knows the formula for voltage conversion to dB.
On Jan 18, 2012, at 2:34 AM, Thomas Young wrote:
Most people seem to be overthinking this, Uli has posted the important
equation here:
Y [dBFS] =
I'm just highlighting Uli's post which I think contains the answer to her main
question of how to convert a normalised matlab plot into dbFS. I don't mean to
denigrate what other people have said.
-Original Message-
From: music-dsp-boun...@music.columbia.edu
Thank you for the replies.
What I am interested in is:
Why and under what circumstances is it advantageous to set up the Y axis
as dbFS rather than dbV, dbSPL, or a linear scale? If you use a dB scale
that is referenced to the lowest volume rather than to the loudest level,
then the issues of a
On 19/01/2012 9:03 AM, Linda Seltzer wrote:
Why and under what circumstances is it advantageous to set up the Y axis
as dbFS rather than dbV, dbSPL,
out of the ones you mention, dBFS is the only one that has any meaning
in the digital domain -- since as we've established, the others don't
OK, I'll weigh in on this.
As noted decibels are a relative measure of energy on a logarithmic
scale. Roughly, every time you double the amplitude of a signal, its
energy increases by 6 dB.
There is absolutely no fixed point or origin to the decibel scale. An
origin must be assigned. dB full
Hi Linda,
Ross nailed it on his comments in general (the most basic of which is out of
the ones you mention, dBFS is the only one that has any meaning in the digital
domain), I'm left with a couple of comments:
To your first question, it would be easier if you pointed to particular graphs
and
