This app was mentioned in 11 comments, with an average of 1.91 upvotes
Using a default app that comes with Oxygen or Color OS?
No clue. I use a different audio player app that allows me to adjust playback speed.
Here's what I've been using for mp3s for at least 8 years: https://play.google.com/store/apps/details?id=com.rhmsoft.pulsar.pro
As I see your not a audiophile and evidently desire something simple... Slick and easy, I personally recommend Pulsar Music Player Pro, that UI is the absolute sex
https://play.google.com/store/apps/details?id=com.rhmsoft.pulsar.pro
Pulsar Pro is currently on sale for $1.99 US, regularly 2.99. https://play.google.com/store/apps/details?id=com.rhmsoft.pulsar.pro
https://play.google.com/store/apps/details?id=com.rhmsoft.pulsar.pro I use this and really like it for other reasons as well
I've tested quite a few, but my current favorite is Pulsar+ https://play.google.com/store/apps/details?id=com.rhmsoft.pulsar.pro
Pulsar Music Player does, great App.
https://play.google.com/store/apps/details?id=com.rhmsoft.pulsar.pro
Just switch to Pulsar +
https://play.google.com/store/apps/details?id=com.rhmsoft.pulsar.pro