Doesn’t work
Response from developer
Thanks for the honest feedback, and sorry it didn't work for your setup. What you tried is unfortunately impossible on iPadOS for any app, not just ours: iOS has a single shared media volume, and there is no API to mix two apps that are playing sound at the same time (like a video and a Discord call). App Volume works by setting that one system volume to your preset the moment you open an app — it helps when switching between apps, but it can't separate audio playing simultaneously, and call audio uses its own volume channel entirely. For your case, Discord itself can do the mixing: in the call, tap the participant or stream and lower its volume slider, then raise the system volume for your video. That's the only real per-source control iPadOS allows.
Very Clever
Response from developer
Thanks so much for the kind words and the 5 stars! Glad App Volume's per-app profiles are working well for you. If there's ever a feature you'd like to see, just reach out via Settings → Send Feedback — always happy to hear ideas. 🙌