>Anyone care to shed the light on the math for what totalmix does
>regarding fader-to-mixer, fader-to-db and mixer-to-fader values? What I
>have works, but it's UGLY. (well just the constants... I like things to
>be simple.)
you could use the settings in ardour, which has relatively
sophisticated non-linear, volumetric slider function. these map
between a 0..1 fractional position and a gain coefficient.
static inline double
gain_to_slider_position (ARDOUR::gain_t g)
{
if (g == 0) return 0;
return pow((6.0*log(g)/log(2.0)+192.0)/198.0, 8.0);
}
static inline ARDOUR::gain_t
slider_position_to_gain (double pos)
{
/* XXX Marcus writes: this doesn't seem right to me. but i don't have a better
answer ... */
return pow (2.0,(sqrt(sqrt(sqrt(pos)))*198.0-192.0)/6.0);
}
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