In the below image, you can see two posts in The Overflow Blog. One of these is a written blog post, and the other is a podcast episode.
Currently, all content in the Blog has the pencil icon. I've found it confusing at times where I come across an interesting topic but cannot listen to a podcast at the time or read a transcript.
I feel like it would be clearer if the podcasts have a microphone icon, and articles/writeups could keep the pencil icon.
(For reference, the podcast episode is "The evolution of full stack engineers".)