Researchers from Singapore's Agency for Science, Technology, and Research (A*STAR) have developed I2R Speech2Singing, voice synthesis software they say can make anyone's singing voice sound more melodious.
The software automatically produces high-quality singing while preserving the original character of the user's natural voice.
The program works by polishing melody while retaining the original content and timbre of a sound. It uses recordings by professional singers as templates to correct the melody of a singing voice or to convert a speaking voice into a singing one.
The software detects the timing of each phonetic sound using speech-recognition technology and then stretches or compresses the duration of the signal using voice-conversion technology to match the rhythm to that of a professional singer. A speech synthesizer then combines the time-corrected voice with pitch data and background music to produce a melodic solo.
"When we compared the output with other currently available applications, we realized that our software generated a much better voice quality," says A*STAR's Minghui Dong.
The researchers now are developing a way to quickly add songs to the software so large-scale song databases can be built.
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