hello I need to create a wordpress platform that allows me to insert podcasts and then use them on other platforms like spotify … using the rss field until now it’s simple.

The problem is that I also need to create an audio ad in the middle of any podcast and change the advertisement manually when I want.

I thought of creating 3 audios the first one is the podcast
the second is the ad
and the 3 rd is the mix of these two audios
so using the plugins custom post type and acf I created a post type called podcast with 3 fields : ads and podcast and final product

how can i mix automaticly the ad with the podcast and display it in the finel product in wordpress?