PACPL -it's in the repo
after install just right click on the file and go to actions>pacpl-convert
Perl Audio Converter is a tool for converting multiple audio types from one format to another.
It supports AAC, AC3, AIFF, APE, AU, AVR, BONK, CDR, FLA, FLAC,
LA, LPAC, M4A, MP2, MP3, MP4, MPC, MPP, OFR, OFS, OGG, PAC, RA,
RAM, RAW, SHN, SMP, SND, SPX, TTA, VOC, WAV, WMA, and WV. It can
also convert audio from the following video extensions: RM, RV,
ASF, DivX, MPG, MKV, MPEG, AVI, MOV, OGM, QT, VCD, SVCD, M4V, NSV,
NUV, PSP, SMK, VOB, FLV, and WMV.
A CD ripping function with CDDB support, batch conversion, tag
preservation for most supported formats, independent tag
reading/writing, and extensions for Konqueror, Dolphin and Amarok
are also provided.