Question 2
In modern Text-to-Speech (TTS) pipelines like Tacotron2 or FastSpeech, what is the specific role of a component like HiFi-GAN or WaveNet?
To convert the input text into a sequence of phonemes (G2P).
To predict the duration of each phoneme in the sequence.
To convert the intermediate mel-spectrogram representation into a raw audio waveform.
To extract a speaker embedding from a reference audio file.