[T5](https://huggingface.co/docs/transformers/model_doc/t5#transformers.T5EncoderModel), specifically the
[google/flan-t5-large](https://huggingface.co/google/flan-t5-large) variant. Second frozen text-encoder use
for TTS. AudioLDM2 uses the encoder of
[Vits](https://huggingface.co/docs/transformers/model_doc/vits#transformers.VitsModel).
projection_model ([`AudioLDM2ProjectionModel`]):
A trained model used to linearly project the hidden-states from the first and second text encoder models