Re: What is line level audio?



BobG wrote:

Eeyore wrote:
What do you mean by an average anyway ? The dynamics of different styles of
music push the level allo ver the place from one moment to the next. The
concept of average isn't teriibly helpful. You need to avoid distorting the
loud passages.
=======================================================
I was interested in using the rms to model as the dc heating in the
voice coil as a speaker protector... I wrote some programs that graphed
a music wave, its avg, and its rms, and was surprised to see the rms
riding about 3dB above the avg. I expected the 'crest factor' to be
more variable with wave shape. The conclusion was: use a long time
constant avg (seconds), set the threshold 3dB below the power handling
capability of the speakers, dont let the clipping indicators stay on
too much.

3dB doesn't surprise me for modern music at all.

Try it with some classical !

Graham


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