devocalise

Verb

devocalize (third-person singular simple present devocalizes, present participle devocalizing, simple past and past participle devocalized)

1. (transitive) To make toneless; to deprive of vowel quality.
   • If we take a high vowel […] and devocalise it, we obtain a hiss […]1877, Henry Sweet, A Handbook of Phonetics
2. (transitive) To reduce the volume of the vocalizations of (an animal) by surgically removing tissue from its vocal cords.

   Synonyms:

   debark, disbark

3. To remove the vocals of a song with an AI program creating a false instrumental with imperfections (vocal shadows).