diff options
| -rw-r--r-- | gtk2_ardour/fft.cc | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/gtk2_ardour/fft.cc b/gtk2_ardour/fft.cc index 2d44328759..e07aed6c59 100644 --- a/gtk2_ardour/fft.cc +++ b/gtk2_ardour/fft.cc @@ -79,12 +79,15 @@ FFT::analyze(ARDOUR::Sample *input, WindowingType windowing_type) for (uint32_t i = 1; i < _data_size - 1; ++i) { power = (Re * Re) + (Im * Im); - phase = atanf(Im / Re); - - if (Re < 0.0 && Im > 0.0) { - phase += M_PI; - } else if (Re < 0.0 && Im < 0.0) { - phase -= M_PI; + if (power < 1e-16) { + phase = 0; + } else { + phase = atanf (Im / Re); + if (Re < 0.0 && Im > 0.0) { + phase += M_PI; + } else if (Re < 0.0 && Im < 0.0) { + phase -= M_PI; + } } _power_at_bin[i] += power; |