It might be just me, but I'm usually listening to something in the background whilst using Renshuu on mobile. When the background audio fades out then in when an audio is played in Renshuu, it's pretty annoying, and when it's happening every few seconds, it's even more annoying.
it would be very useful if we could control this fade strength, that it would automatically proportionally scale with the user-set audio volume (set via Settings), or if it were removed completely.
Unfortunately, that's pretty tricky to do :(. I have some amount of control for iOS, and could potentially add a "disable fade" for iOS, but I'd need to do additional research on Android, and that's not something I have time to do at the moment. It's something I could potentially look into sometime in 2023.
Oh, that makes sense then I've almost saved up for a phone that I can finally play genshin and project sekai smoothly on, so it shouldn't matter for me soon anyways.