Gain Structure of the Mixer

[steven32bits]

Is there a structure as to how to add gain 1dB at a time. So far it has been a guessing game for me. Any positive gain I add cannot exceed a value of 2 even though the documentation states that any value between 1 and 32,767 is a positive gain and anything between 0 and 1 attenuates the signal. Is there something I can read that shows an algorithm to calculate + and - 1dB?

code:

mixer1.gain(0, 1.04); // My ears tell me that it is boosting channel 1 of the mixer by at least 9dB
mixer1.gain(1, 0.02); // Attenuating channel 2 of the mixer by a lot.....

 

[PaulStoffregen]

Maybe something like this?

mixer1.gain(0, powf(10.0f, dB / 20.0f));

 

[steven32bits]

I will try it tomorrow! Thanks for the tip, I will update you.