I have only used Gumroad for ebooks. I'd guess they would at least have some way to play the audio and may be even remember last location for users returning.
That said, I was suggesting Gumroad mainly for providing the files and let users use their own preferred apps. Sanderson's team has mentioned that currently they do not have bandwidth to host audio on their own site.
That said, I was suggesting Gumroad mainly for providing the files and let users use their own preferred apps. Sanderson's team has mentioned that currently they do not have bandwidth to host audio on their own site.