D.4 Trade-Off between Speed and Quality
We find that 10 sampling steps in both stages can
be enough to generate reasonable audio. We can
achieve improved quality and reduced noise for
high-frequency sounds by trading off the speed,
i.e., increasing the number of sampling steps in
the diffusion decoder, e.g., 50 – 100 steps) will
similarly improve the quality, likely due to the more
detailed generated latents, and at the same time
result in an overall better structured music. To
make sure the results are comparable when varying
the number of sampling steps, we use the same
starting noise in both stages. In both cases, this
suggests that using more advanced samplers could
be helpful to improve on the speed-quality trade-
off.

D.5 Trade-Off between Compression Ratio

and Quality
MOUSAI