Built-in functions

abs(x) absolute value of x
biquad(x,a0,a1,a2,b0,b1,b2) biquad-filter applied to x with 6 coefficients; the transfer function is H(z) = (b0 + b1*z^-1 + b2*z^-2) / (a0 + a1*z^-1 + a2*z^-2)
biquad(x,g,a1,a2,b1,b2) biquad with 5 parameters: H(z) = g * (1 + b1*z^-1 + b2*z^-2) / (1 + a1*z^-1 + a2*z^-2)
cos(x) cosine of x, with x in radians
cos1(x) cosine of x, x=0...1 for a full circle
fir(x,a,b,c,...,j,k) x FIR-filtered with coefficients a,b,c,...,j,k
firsymeven(x,a,b,c,...,j,k) x FIR-filtered with coefficients a,b,c,...,j,k,k,j,....,c,b,a
firsymodd(x,a,b,c,...,j,k) x FIR-filtered with coefficients a,b,c,...,j,k,j,....,c,b,a
mod1(x) x mod 1; i.e., the fractional part of x
round(x,y) round x to nearest multiple of y
sin1(x) sine of x, x=0...1 for a full circle
sqrt(x) square root of x