Written by Airenas Vaičiūnas @ VMU, Kaunas (2020/03/13)
tts1
recipe is based on Tacotron2 [1] (spectrogram prediction network) w/o WaveNet.
Tacotron2 generates log mel-filter bank from text and then converts it to linear spectrogram using inverse mel-basis.
Finally, phase components are recovered with Griffin-Lim.