Florent Ghys

When I change the speed of a groove~ by sending a 2 to a sig~, the volume is louder than the original speed.

Is it just a feeling or is it a natural acoustic fact ?

And is there like a mathematical relation between speed and volume in order to keep the same volume while changing speed ?

When I change the speed of a groove~ by sending a 2 to a sig~, the volume is louder than the original speed.
Is it just a feeling or is it a natural acoustic fact ?
And is there like a mathematical relation between speed and volume in order to keep the same volume while changing speed ?

Hello!
When I change the speed of a groove~ by sending a 2 to a sig~, the volume is louder than the original speed.
Is it just a feeling or 

changing-speed-of-groove-also-changes-volume

there is a relation between pitch and loudness, but the factor depends on the

just make some tests and find your personal value for lowering the gain (with

the desired effect on the percepted loudness) like say, -3db/A per octave ...

there is a relation between pitch and loudness, but the factor depends on the
material and is not predictable.

just make some tests and find your personal value for lowering the gain (with
the desired effect on the percepted loudness) like say, -3db/A per octave ... 

but does it mean it is going to be a different factor if I play on another PA ?

thanks for your reply Roman
I will measure it with my material
but does it mean it is going to be a different factor if I play on another PA ?
thanks


I think that this "material" Roman's talking about is not your speakers but the samples you're using. But I'm maybe wrong.

http://en.wikipedia.org/wiki/Robinson-Dadson_curves

I think he's referring to this: http://en.wikipedia.org/wiki/Robinson-Dadson_curves


http://en.wikipedia.org/wiki/Fletcher-Munson_curves

Not predictable? http://en.wikipedia.org/wiki/Fletcher-Munson_curves


oops, looks like we had the same idea. ish..

very interesting readings...
thanks guys !
that's exactly what I was looking for


fletcher munson, no not exactly what i was thinking of.

because it wont really work for broadband audio like say, a piano sample or a drumloop.

fletcher munson, no not exactly what i was thinking of.
because it wont really work for broadband audio like say, a piano sample or a drumloop.


if you know the playback volume, maybe you could use a weighting-filter to calculate the perceived loudness and compensate for that...??

http://en.wikipedia.org/wiki/Weighting_filter

Changing speed of groove~ also changes volume ?