MP3
AMR amafayela
I-MP3 (MPEG Audio Layer III) iyifomethi yomsindo esetshenziswa kabanzi eyaziwa ngokucindezela kwayo okuphezulu ngaphandle kokudela kakhulu ikhwalithi yomsindo.
I-AMR (I-Adaptive Multi-Rate) ifomethi yokuminyanisa yomsindo elungiselelwe ukubhalwa kwekhodi yenkulumo. Ivamise ukusetshenziswa kumakhalekhukhwini ukuqoshwa kwezwi nokudlalwa komsindo.