Re: [music-dsp] music-dsp Digest, Vol 97, Issue 21

2012-01-19 Thread Uli Brueggemann
We may ask: what is the difference between a plot in dBFS, dBu, dBV or dBxx scale? Indeed we will find some kind of factor between the units, something like 1 full scale = f1 * voltage = f2 * sound pressure level = f3 * another reference (f1..= factors). Now in the logarithmic domain a value x mul

Re: [music-dsp] music-dsp Digest, Vol 97, Issue 21

2012-01-18 Thread Nigel Redmon
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 an

Re: [music-dsp] music-dsp Digest, Vol 97, Issue 21

2012-01-18 Thread Ross Bencina
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 h

Re: [music-dsp] music-dsp Digest, Vol 97, Issue 21

2012-01-18 Thread Linda Seltzer
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