Nice application for a cappella!

Very useful application and I really love this! I often use this when I do a cappella by myself.

However there is a problem in Mix-down function after the latest upload. The device Im using is iPhone5. Because I want to use this application as long as possible, please check the system. Thank you! :)
This application is awesome!

agua de beber kamra about Multi Track Song Recorder, v2.0.2