Hello Michael, 

Here two way to do it:

1. You can use a css code: Go to wp-admin>theme options>custom css/js
And add this code in the custom css field:

.single-sr_playlist .srp_tracklist{
display: none;
}

2. Or you can set the player in the single music post with a shortcode. Go to wp-admin>mp3 player>settings>widget player
Enable the "Use Advanced Player Shortcode for the Single Post" option here
And copy this in the shortcode field:
[sonaar_audioplayer show_playlist="false" sticky_player="true" show_skip_bt="true" show_volume_bt="true" show_speed_bt="true" show_shuffle_bt="true"]

You are welcome