TubeMate YouTube Downloader - This post explains about 'Convert' configuration. First, you need to enable MP3 Video Converter (requires an additional app installed from play store) for download audio (AAC/MP3) and video
Descarga de APK de Run Tubemate MP3 Converter para Android
Descarga de APK de TubeMate para Android
TUBEMATE, MP3 CONVERTER,MY MP3 by OFFLINE MUSIC PLAYER