Could be interesting, though spectrogram voice gen is a step back in terms of advancement. Vocoder models that take in Mel Specs suffer from a lot of issues like hissing due to Griffin Lim issues. Would be curious to see if diffusion models can work on neural codecs directly.
I think Google had one called riffusion (the first version was designed for specs)
I think Google had one called riffusion (the first version was designed for specs)