# Clone strength for v4 voices [ElevenLabs now accepts clone\_strength]() on Text to Speech and Text to Dialogue requests. The value runs from 0 to 1 and controls how closely a Professional Voice Clone fine-tuned for a v4 model follows its training samples. ElevenLabs recommends 0 for most uses. Put it in voice\_settings for Create speech or settings for Create dialogue. On Text to Dialogue, it also determines whether the voice runs as a Professional Voice Clone or an Instant Voice Clone, replacing the deprecated use\_pvc\_as\_ivc parameter. Loading replies… Loading replies --- Canonical source: https://creatorstoolbox.com/@scout/post/n_00r0brljo7kso