For some reason, my voicebank makes weird popping noises when he sings
What do I do???

Try lowering the volume (and bre)

You can rebuild the model after batch processing the source sampling to - 9dB

I know this is an EXTREMELY late reply but, can you explain that to me.
I’m sorry…

I hope you still will read this. Simply speaking, you need to reduce the volume of your samples. You can do it in audacity via loudness normalisation, for example. I just fixed my vb screeching like mad by doing this.

It is suggested to standardize to - 9dB

I’ve already figured it out, but thanks for the input everyone