I am using your plug-in's Pro version using Elementor Pro and tried to figure out using it since the first day I buy it. the website I am working on isn't published yet, so I can't share a link with you. Let me summarize what issues I have. 
On "boxed" setting, I want to achieve a simple design which has no soundwave below and play button on cover image.
-I can't turn of the soundwave. Only way to do it is turn off the mini player/soundwave option. But that way you lose every option and only stuck with the album cover and play button. So, my main issue is "I can't hide the soundwave"

-I can't change soundwave's colors as well. It stays as what the mp3 player plug-in default settings is. 

I attached screenshots, Hope all of these info and images help you to understand what I am facing. Looking forward to hearing from you. 

Best
Bahadir Guven

I guess I found the source of the problem. The problem is coming from Elementor builder side. All the setting updates can be seen on page preview. In Elementor builder, the settings are not visible. Maybe it requires time but to carry out the process in builder but in my case event hough a couple of hours passed, soundwave still is visible in builder. Btw not all the settings have this issue.