I have a project created in Alpha that I uploaded to the sharing platform at https://lmms.io/lsp/?action=show&file=23898 . It does a trick to include 4 bit PCM (samples). The 'samples' play on Alpha but not the nightly build or the latest version on GitHub. I know this was not the intent of Xpressive (to store samples as expressions), but it has got me thinking, if these aren't working anymore, what other Xpressive expressions also aren't working. If you open the linked project, you should be able to hear singing - which you won't anymore.