Periodic noise in flow based model?

[npuichigo]

Hi,
Thank you for your nice job. But I found that either your FloWaveNet or NVIDIA's WaveGlow has a problem of containing periodic noise.

Maybe this is caused by the squeeze operations, because I found that the frequencies of the periodic noise in WaveGlow are multiples of sample_rate // squeeze_factor. (for example, 16khz audio with squeeze_factor 8 may have periodic noise with 2khz, 4khz, 6khz and so on)

So do you any idea about how to solve this problem?

[ksw0306]

Thank you for the input! We're also experiencing these kinds of freq band artifact during experiments (as stated in the preliminary draft). We are now tracking down the possible root cause with follow-up experiments. We'll share our result soon along with the updated version of the draft!

[jiqizaisikao]

Hi,i have also met this problem