Audio pitch changing device
AssigneeRoland Corporation
InventorTakahiro Ae
Life of this patent
Estimating the term…
Abstract
An effect device may be configured such that when an input audio signal switches from a consonant to a vowel and an input level of the switched vowel is greater than a threshold value Lc (and a variable t is greater than time Ts), an audio effect signal A may be generated. Such an effect device may allow for increasing the occurrences when portamento is simulated, while still sounding natural. In general, a detecting module detects whether an audio signal is a vowel sound or a consonant sound and whether the audio signal changed from a consonant sound to a vowel sound; and a pitch change module changes a pitch of the audio signal and changes, based on a prescribed function, an amount the pitch is changed to produce a modified audio signal, when the audio signal changed from a consonant sound to a vowel sound.
Claims19
An effect device comprising:
- an input means for inputting an audio signal;
- an effect providing means for acquiring the audio signal at a plurality of times, the effect providing means for providing an effect to the acquired audio signal to produce an audio effect signal;
- and
- an output means for outputting the audio effect signal;
- the effect providing means comprising:
- a determination means for determining whether the acquired audio signal is a vowel or a consonant;
- a detection means for detecting whether the acquired audio signal was switched from a consonant to a vowel;
- a first change means for changing a pitch of the acquired audio signal by an amount when the detection means detects that the acquired audio signal was switched from a consonant to a vowel;
- a first convergence means for converging the amount the pitch is changed by the first change means to a value based on a prescribed function;
- and
- a first output means for outputting the converged audio signal as the audio effect signal to the output means.
An effect device comprising:
- an input device for inputting an audio signal;
- an effect processor configured to acquire the audio signal at a plurality of times, the effect processor configured to provide an effect to the acquired audio signal to produce an audio effect signal, the effect processor comprising:
- a determination module configured to determine whether the acquired audio signal is a vowel or a consonant;
- an amplitude detection module configured to detect an amplitude of the acquired audio signal when the determination module determines that the acquired audio signal is a vowel;
- an amplitude decision module configured to decide whether the amplitude is above a threshold;
- a continuity detection module configured to detect whether a previous audio signal acquired at a previous time is determined by the determination module to be a vowel, when the amplitude decision module decides that the amplitude is above the threshold;
- an amplitude change detection module configured to detect a change amount between the amplitude of the acquired audio signal and the amplitude of the previous acquired audio signal, when the continuity detection module detects the previous audio signal is a vowel;
- an amplitude change decision module configured to decide whether the change amount is above a prescribed value;
- a pitch change module configured to change the pitch of the acquired audio signal by an amount, when the amplitude change decision module decides the change amount is above the prescribed value;
- a pitch convergence module configured to converge the amount the pitch is changed by the pitch change module to a value based on the prescribed function to produce the audio effect signal;
- and
- an output device for outputting the audio effect signal.
An effect device comprising:
- an input terminal for receiving an audio signal;
- a processor configured to produce a modified audio signal by applying an effect to the audio signal, the processor comprising:
- a detecting module configured to detect whether the audio signal comprises a vowel sound or a consonant sound, and configured to detect whether the audio signal changed from a consonant sound to a vowel sound;
- and
- a pitch change module configured to change a pitch of the audio signal, and configured to change, based on a prescribed function, an amount the pitch of the audio signal is changed to produce the modified audio signal, when the detecting module detects that the audio signal changed from a consonant sound to a vowel sound;
- and
- an output terminal for outputting the modified audio signal.
Dependencies are inferred from the claim text.