FormantFilter Sound_and_Pitch_to_FormantFilter (Sound me, Pitch thee, double analysisWidth, double dt, double f1_hz, double fmax_hz, double df_hz, double relative_bw) { try { double t1, windowDuration = 2 * analysisWidth; /* gaussian window */ double nyquist = 0.5 / my dx, samplingFrequency = 2 * nyquist, fmin_hz = 0; long nt, f0_undefined = 0; if (my xmin > thy xmin || my xmax > thy xmax) Melder_throw ("The domain of the Sound is not included in the domain of the Pitch."); double f0_median = Pitch_getQuantile (thee, thy xmin, thy xmax, 0.5, kPitch_unit_HERTZ); if (f0_median == NUMundefined || f0_median == 0) { f0_median = 100; Melder_warning (L"Pitch values undefined. Bandwith fixed to 100 Hz. "); } if (f1_hz <= 0) { f1_hz = 100; } if (fmax_hz <= 0) { fmax_hz = nyquist; } if (df_hz <= 0) { df_hz = f0_median / 2; } if (relative_bw <= 0) { relative_bw = 1.1; } fmax_hz = MIN (fmax_hz, nyquist); long nf = floor ( (fmax_hz - f1_hz) / df_hz + 0.5); Sampled_shortTermAnalysis (me, windowDuration, dt, &nt, &t1); autoFormantFilter him = FormantFilter_create (my xmin, my xmax, nt, dt, t1, fmin_hz, fmax_hz, nf, df_hz, f1_hz); // Temporary objects autoSound sframe = Sound_createSimple (1, windowDuration, samplingFrequency); autoSound window = Sound_createGaussian (windowDuration, samplingFrequency); autoMelderProgress progress (L"Sound & Pitch: To FormantFilter"); for (long i = 1; i <= nt; i++) { double t = Sampled_indexToX (him.peek(), i); double b, f0 = Pitch_getValueAtTime (thee, t, kPitch_unit_HERTZ, 0); if (f0 == NUMundefined || f0 == 0) { f0_undefined++; f0 = f0_median; } b = relative_bw * f0; Sound_into_Sound (me, sframe.peek(), t - windowDuration / 2); Sounds_multiply (sframe.peek(), window.peek()); Sound_into_FormantFilter_frame (sframe.peek(), him.peek(), i, b); if ( (i % 10) == 1) { Melder_progress ( (double) i / nt, L"Frame ", Melder_integer (i), L" out of ", Melder_integer (nt), L"."); } } double ref = FilterBank_DBREF * gaussian_window_squared_correction (window -> nx); NUMdmatrix_to_dBs (his z, 1, his ny, 1, his nx, ref, FilterBank_DBFAC, FilterBank_DBFLOOR); return him.transfer(); } catch (MelderError) { Melder_throw ("FormantFilter not created from Pitch & FormantFilter."); } }
autoSpectrogram Sound_and_Pitch_to_Spectrogram (Sound me, Pitch thee, double analysisWidth, double dt, double f1_hz, double fmax_hz, double df_hz, double relative_bw) { try { double t1, windowDuration = 2.0 * analysisWidth; /* gaussian window */ double nyquist = 0.5 / my dx, samplingFrequency = 2.0 * nyquist, fmin_hz = 0.0; long numberOfFrames, f0_undefined = 0.0; if (my xmin > thy xmin || my xmax > thy xmax) Melder_throw (U"The domain of the Sound is not included in the domain of the Pitch."); double f0_median = Pitch_getQuantile (thee, thy xmin, thy xmax, 0.5, kPitch_unit_HERTZ); if (f0_median == NUMundefined || f0_median == 0.0) { f0_median = 100.0; Melder_warning (U"Pitch values undefined. Bandwith fixed to 100 Hz. "); } if (f1_hz <= 0.0) { f1_hz = 100.0; } if (fmax_hz <= 0.0) { fmax_hz = nyquist; } if (df_hz <= 0.0) { df_hz = f0_median / 2.0; } if (relative_bw <= 0.0) { relative_bw = 1.1; } fmax_hz = MIN (fmax_hz, nyquist); long numberOfFilters = lround ( (fmax_hz - f1_hz) / df_hz); Sampled_shortTermAnalysis (me, windowDuration, dt, &numberOfFrames, &t1); autoSpectrogram him = Spectrogram_create (my xmin, my xmax, numberOfFrames, dt, t1, fmin_hz, fmax_hz, numberOfFilters, df_hz, f1_hz); // Temporary objects autoSound sframe = Sound_createSimple (1, windowDuration, samplingFrequency); autoSound window = Sound_createGaussian (windowDuration, samplingFrequency); autoMelderProgress progress (U"Sound & Pitch: To FormantFilter"); for (long iframe = 1; iframe <= numberOfFrames; iframe++) { double t = Sampled_indexToX (him.get(), iframe); double b, f0 = Pitch_getValueAtTime (thee, t, kPitch_unit_HERTZ, 0); if (f0 == NUMundefined || f0 == 0.0) { f0_undefined ++; f0 = f0_median; } b = relative_bw * f0; Sound_into_Sound (me, sframe.get(), t - windowDuration / 2.0); Sounds_multiply (sframe.get(), window.get()); Sound_into_Spectrogram_frame (sframe.get(), him.get(), iframe, b); if (iframe % 10 == 1) { Melder_progress ( (double) iframe / numberOfFrames, U"Frame ", iframe, U" out of ", numberOfFrames, U"."); } } _Spectrogram_windowCorrection (him.get(), window -> nx); return him; } catch (MelderError) { Melder_throw (U"FormantFilter not created from Pitch & FormantFilter."); } }