New answers tagged

2 votes

First-order allpass filter coefficient calculation

The math becomes a lot easier if you use the formula for the frequency response instead of the formula for the phase. The frequency response of an allpass filter can be written as $$H\big(e^{j\omega}\...
Matt L.'s user avatar
  • 88.9k
2 votes

First-order allpass filter coefficient calculation

The math is a bit of a slog here. Let's start with $$H(z) = \frac{a+z^{-1}}{1+az^{-1}} \tag{1}$$ On the unit circle this becomes $$H(\omega) = \frac{a+e^{-j\omega}}{1+ae^{-j\omega}} \tag{2}$$ where $\...
Hilmar's user avatar
  • 42.5k
2 votes

Why does the griffin lim algorithm work?

Sound is just the combination of multiple sin waves at different frequencies and phases. These phases determine how those sin waves combine together, i.e. if frequencies are resonant or eliminate each ...
biendltb's user avatar
  • 121

Top 50 recent answers are included