forbidden 320 kbit/s 256 kbit/s 224 kbit/s 192 kbit/s 160 kbit/s 128 kbit/s 112 kbit/s 96 kbit/s 80 kbit/s 64 kbit/s 56 kbit/s 48 kbit/s 40 kbit/s 32 kbit/s free format