sorry about the loud shuffling noise! there's no animation missing or bug with the audio. i'll level with you–i'm not very good at programming yet and i mostly tested this on my DMG without headphones. it's not too bad that way. with headphones, i just turned down the audio since it's not that important to the program. i would recommend doing this (again, sorry, i know this is not ideal lol)
more info if u want: basically you only have tap the D-pad once or twice to seed the card RNG and hit A to pull a card/stop the noise. if you want to pull multiple random cards, you don't need to shuffle again until after a hard reset of the console (or you start getting a lot of repeat cards). hope this helps!