I’ve been trying to use the audio boost option on the iOS app and it’s not doing anything. I verified that the audio is being transcoded, and I even tried manually forcing transcoding just in case, but still no effect. I have the volume turned up as high as it’ll go on both the iPad and my headphones, but it’s still hard to hear when there’s a lot of ambient noise.
It’s known not to be working in the transcoder now for some time. No feedback has been given when it might be resolved
Not the answer I was hoping for, but that does explain it. 
Thanks!
