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."); } }
BarkFilter Sound_to_BarkFilter (Sound me, double analysisWidth, double dt, double f1_bark, double fmax_bark, double df_bark) { try { double t1, nyquist = 0.5 / my dx, samplingFrequency = 2 * nyquist; double windowDuration = 2 * analysisWidth; /* gaussian window */ double zmax = NUMhertzToBark2 (nyquist); double fmin_bark = 0; long nt, frameErrorCount = 0; // Check defaults. if (f1_bark <= 0) { f1_bark = 1; } if (fmax_bark <= 0) { fmax_bark = zmax; } if (df_bark <= 0) { df_bark = 1; } fmax_bark = MIN (fmax_bark, zmax); long nf = floor ( (fmax_bark - f1_bark) / df_bark + 0.5); if (nf <= 0) { Melder_throw ("The combination of filter parameters is not valid."); } Sampled_shortTermAnalysis (me, windowDuration, dt, & nt, & t1); autoSound sframe = Sound_createSimple (1, windowDuration, samplingFrequency); autoSound window = Sound_createGaussian (windowDuration, samplingFrequency); autoBarkFilter thee = BarkFilter_create (my xmin, my xmax, nt, dt, t1, fmin_bark, fmax_bark, nf, df_bark, f1_bark); autoMelderProgress progess (L"BarkFilter analysis"); for (long i = 1; i <= nt; i++) { double t = Sampled_indexToX (thee.peek(), i); Sound_into_Sound (me, sframe.peek(), t - windowDuration / 2); Sounds_multiply (sframe.peek(), window.peek()); if (! Sound_into_BarkFilter_frame (sframe.peek(), thee.peek(), i)) { frameErrorCount++; } if ( (i % 10) == 1) { Melder_progress ( (double) i / nt, L"BarkFilter analysis: frame ", Melder_integer (i), L" from ", Melder_integer (nt), L"."); therror } } if (frameErrorCount > 0) { Melder_warning (L"Analysis results of ", Melder_integer (frameErrorCount), L" frame(s) out of ", Melder_integer (nt), L" will be suspect."); } double ref = FilterBank_DBREF * gaussian_window_squared_correction (window -> nx); NUMdmatrix_to_dBs (thy z, 1, thy ny, 1, thy nx, ref, FilterBank_DBFAC, FilterBank_DBFLOOR); return thee.transfer(); } catch (MelderError) {
MelFilter Sound_to_MelFilter (Sound me, double analysisWidth, double dt, double f1_mel, double fmax_mel, double df_mel) { try { double t1, samplingFrequency = 1 / my dx, nyquist = 0.5 * samplingFrequency; double windowDuration = 2 * analysisWidth; /* gaussian window */ double fmin_mel = 0; double fbottom = HZTOMEL (100.0), fceiling = HZTOMEL (nyquist); long nt, frameErrorCount = 0; // Check defaults. if (fmax_mel <= 0 || fmax_mel > fceiling) { fmax_mel = fceiling; } if (fmax_mel <= f1_mel) { f1_mel = fbottom; fmax_mel = fceiling; } if (f1_mel <= 0) { f1_mel = fbottom; } if (df_mel <= 0) { df_mel = 100.0; } // Determine the number of filters. long nf = floor ( (fmax_mel - f1_mel) / df_mel + 0.5); fmax_mel = f1_mel + nf * df_mel; Sampled_shortTermAnalysis (me, windowDuration, dt, &nt, &t1); autoSound sframe = Sound_createSimple (1, windowDuration, samplingFrequency); autoSound window = Sound_createGaussian (windowDuration, samplingFrequency); autoMelFilter thee = MelFilter_create (my xmin, my xmax, nt, dt, t1, fmin_mel, fmax_mel, nf, df_mel, f1_mel); autoMelderProgress progress (L"MelFilters analysis"); for (long i = 1; i <= nt; i++) { double t = Sampled_indexToX (thee.peek(), i); Sound_into_Sound (me, sframe.peek(), t - windowDuration / 2); Sounds_multiply (sframe.peek(), window.peek()); if (! Sound_into_MelFilter_frame (sframe.peek(), thee.peek(), i)) { frameErrorCount++; } if ( (i % 10) == 1) { Melder_progress ( (double) i / nt, L"Frame ", Melder_integer (i), L" out of ", Melder_integer (nt), L"."); } } if (frameErrorCount) Melder_warning (L"Analysis results of ", Melder_integer (frameErrorCount), L" frame(s) out of ", Melder_integer (nt), L" will be suspect."); // Window correction. double ref = FilterBank_DBREF * gaussian_window_squared_correction (window -> nx); NUMdmatrix_to_dBs (thy z, 1, thy ny, 1, thy nx, ref, FilterBank_DBFAC, FilterBank_DBFLOOR); return thee.transfer(); } catch (MelderError) { Melder_throw (me, ": no MelFilter created."); } }