Usage charges vary for different features of Altered Studio. For Speech-To-Speech morphing, your usage is charged for the length of the first morph you do on a selection of audio. After that, any subsequent morphs on the same selection will not count towards your usage. For Text-To-Speech and text translation, Altered Studio uses Text Tokens, which are generally equivalent to 1 character of text. Higher quality third party voices (like the 'Google Studio' voices) consume a higher number of Text Tokens per character, this is displayed on the voice cards in the library.