Linear vs. exponential audio fade
An exponential amplitude fade is usually more subjectively natural-sounding than a linear amplitude fade. This patch allows you to compare the two.
Clicking on the toggle at the top of the patch will fade the test tone in and out.Clicking on the matrixctrl buttons for “Linear” and “Decibel” lets you choose between a linear fade and an exponential fade, to see which you think sounds more intuitive and natural. You can also move the sliders manually to see which you think feels more intuitive and natural.
The gain~ and live.gain~ objects (not shown here) both use exponential fading, and they internally implement interpolation between amplitude values, as demonstrated with the line~ objects in this patch.