Exemplo n.º 1
0
        public WAVSound Modify(WAVSound sound, double relativeStartPitch, double relativeEndPitch, Boolean adjustDuration, double relativeDuration)
        {
            // First, find the speech type variation:
            //  speechTypeEstimator = new SpeechTypeEstimator();
            speechTypeEstimator.FindSpeechTypeVariation(sound);

            /*    speechTypeEstimator.FindSpeechTypeVariation(sound, 0, frameDuration, frameShift, speechTypeLowPassCutoffFrequency, speechTypeLowPassRatioThreshold,
             *      speechTypeEnergyThreshold, speechTypeSilenceThreshold);
             *  speechTypeEstimator.Adjust(3);
             *  speechTypeEstimator.Adjust(3); // repeat the adjustment to remove double errors.  */
            SpeechTypeSpecification speechTypeSpecification = speechTypeEstimator.SpeechTypeSpecification;

            // Next, find the pitch periods:
            PitchPeriodEstimator pitchPeriodEstimator = new PitchPeriodEstimator();

            pitchPeriodEstimator.ComputePitchPeriods(sound, 0.0, sound.GetDuration()); //, minimumPitchPeriod, maximumPitchPeriod, frameShift); // 0.0120, 0.01, 0.03);
            pitchPeriodEstimator.AdjustAndInterpolate(speechTypeSpecification);        //, pitchPeriodDeltaTime, setUnvoicedPitch); // 0.005, true);
            PitchPeriodSpecification pitchPeriodSpecification = pitchPeriodEstimator.PitchPeriodSpecification;

            // Then, find the pitch marks:
            pitchMarkEstimator = new PitchMarkEstimator();
            pitchMarkEstimator.FindPitchMarks(sound, speechTypeSpecification, pitchPeriodSpecification); // , 0.0025, 0.0025, 0.45, 0.002);
            List <double> pitchMarkTimeList = pitchMarkEstimator.PitchMarkTimeList;

            // Then, change the pitch of the sound
            double   originalDuration       = sound.GetDuration();
            double   desiredDuration        = originalDuration * relativeDuration;
            double   actualRelativeDuration = relativeDuration; // Valid if the pitch is unchanged ...
            WAVSound pitchChangedSound;

            if ((Math.Abs(relativeStartPitch - 1) > double.Epsilon) || (Math.Abs(relativeEndPitch - 1) > double.Epsilon)) // To save some time, if only duration is to be changed..
            {
                pitchChangedSound = ChangePitch(sound, pitchMarkTimeList, relativeStartPitch, relativeEndPitch);
                // The pitch change also changes the duration of the sound:
                double newDuration = pitchChangedSound.GetDuration();
                actualRelativeDuration = desiredDuration / newDuration; // ...but if the pitch is changed, the duration changes too.
            }
            else
            {
                pitchChangedSound         = sound;             // No copying needed here, a reference is sufficient.
                modifiedPitchMarkTimeList = pitchMarkTimeList; // No pitch change => use original pitch marks.
            }

            // If the adjustDuration is true, change the duration, using the stored pitchmark time list (to avoid repeating the three steps above):
            if (adjustDuration)
            {
                WAVSound durationChangedSound = ChangeDuration(pitchChangedSound, modifiedPitchMarkTimeList, actualRelativeDuration);
                return(durationChangedSound);
            }
            else
            {
                return(pitchChangedSound);
            }
        }
Exemplo n.º 2
0
        private List <double> modifiedPitchMarkTimeList; // Generated whenever ChangePitch() is called. Used when changing duration (ChangeDuration()).

        public SpeechModifier()
        {
            speechTypeEstimator  = new SpeechTypeEstimator();
            pitchPeriodEstimator = new PitchPeriodEstimator();
            pitchMarkEstimator   = new PitchMarkEstimator();
        }