which program can play wb-amr and amr in the backround (not recorder in the os)
and which other types are small and pretty good voice(mid-low quality and below 500k for 5 minutes it is the properties of amr type)?
amr music
Check the multimedia section for series 60, also the N7650 section where u have different comparisons, settings for sound files. Apart from AMR-NB & AMR-WB there are AAC, ADPCM, GSM 6.1, WAV files which are supported by the N-gage.