Bass Booster

• Author or source: Johny Dupej
• Type: LP and SUM
• Created: 2006-08-11 12:47:34

notes

This function adds a low-passed signal to the original signal. The low-pass has a quite
wide response.

Params:
selectivity - frequency response of the LP (higher value gives a steeper one) [70.0 to
140.0 sounds good]
ratio - how much of the filtered signal is mixed to the original
gain2 - adjusts the final volume to handle cut-offs (might be good to set dynamically)

code

#define saturate(x) __min(__max(-1.0,x),1.0)

float BassBoosta(float sample)
{
static float selectivity, gain1, gain2, ratio, cap;
gain1 = 1.0/(selectivity + 1.0);

cap= (sample + cap*selectivity )*gain1;
sample = saturate((sample + cap*ratio)*gain2);

return sample;
}