[linux-audio-dev] db gain controls.

[James Courtier-Dutton]

Hi,

I have a question for some audio professionals out there.
What is the smallest sensible gain control step in dB.
Is it 0.5dB ?
I am asking, because if one is using a digital gain control in a 24bit 
fixed point DSP, once could use almost any step size, so I am looking 
for the smallest sensible size to use.

Some people mentioned earlier on a previous thread that there was 
something called soft gain control, where the user moves the gain up a 
step, but the mixer gradually(fairly quickly) adjusts the volume to the 
new level, so no clicks are heard on the speakers. How does these soft 
gain controls prevent the clicking? Do they wait for the zero crossing 
point to adjust the gain?

James