How do I get an MP3 file to autoplay in Qualtrics?

Hi, Upon searching this question, I found many different forms of code which could be used to make this work. However, upon trying all of the basic ones, none of them worked. I then found that I could embed an audio recording from SoundCloud, which should allow me to hide any visuals of the recording whilst allowing it to autoplay. This is the code that I used: <iframe allow="autoplay" frameborder="no" height="300" scrolling="no" src="https://w.soundcloud.com/player/?url=https%3A//api.soundcloud.com/tracks/701519164%3Fsecret_token%3Ds-dd1Lv&color=%23ff5500&autoplay=true&hide_related=false&show_comments=true&show_user=true&show_reposts=false&show_teaser=true&visual=true" width="100%"></iframe> This partially works. It allows the recording to play, but the user has to press a play button to make it work, alongside there being a very large, very orange SoundCloud logo at the top of each page I have put a recording on. I then changed the code slightly so it looked like this: <iframe allow="autoplay" frameborder="no" height="0" scrolling="no" src="https://w.soundcloud.com/player/?url=https%3A//api.soundcloud.com/tracks/701519164%3Fsecret_token%3Ds-dd1Lv&color=%23ff5500&autoplay=true&hide_related=false&show_comments=true&show_user=true&show_reposts=false&show_teaser=true&visual=true" width="0%"></iframe> This got rid of the large orange logo, but appeared to delete the recording in the process. Is there any other way of getting an MP3 recording to autoplay in Qualtrics or has this function been removed? Thanks in advance.