The algorithm adds "whispering" effect to vocals. Model was created by SUC-DriverOld. More details here.

The Aspiration model separates out:
1) Audible breaths
2) Hissing and buzzing of Fricative Consonants ( 's' and 'f' )
3) Plosives: voiceless burst of air produced while singing a consonant (like /p/, /t/, /k/).