A free program for Android, by Ham and More.

This app improves recording quality and includes autotune singing.

Features:- Auto-tune style pitch correction and pitch shifting – Ultra-clear background noise removal/reduction using deep learning- Easy/beginner and pro modes for live or recorded audio- Piano/MIDI keyboard with over 100 instruments- Loop station for beatboxing, live looping, and solo performances- Downloadable rap, hip hop, r&b, pop, and other beat loops- Soundboard with custom downloads- Record to MP3 or uncompressed WAV – Instantly change real-time effects- Professional 10-octave equalizer- Reverb to soften vocal flaws- Sing to yourself live on headphones to work on your vocals- Include a non-filtered backing track- Include a reference track, such as vocals only heard on headphones, to help you sing correctly or to prompt your podcast recording

This app doesn’t record background audio. It’s a sophisticated audio studio system that uses deep learning to give you real-time best-in-class features. This requires full CPU power and foreground operation.