Karaoke App

I'm looking for a developer to fix bugs in the mobile karaoke app for Android platforms. The app I envision should include an offline effects-to-song feature that displays user singing performances. While I would like this app to be interactive and engaging, I do not require any payment system integration now. That said, I'm open to hearing suggestions on creative ways payment systems might be used to enhance the user experience in the future.

Check the attached file for reference. The effects should be similar to what Starmaker is offering. like studio ktv, hall, etc.
or you can provide seek bar for reverb and room size, (check the custom section in Starmaker). This should be performed without using Android default audioeffect library and without superpowered library.