1221 This option may improve clarity for speech-intensive music or noisy signals. Frequency response is somewhat reduced.\nFrequency response: 4.0 kHz Bitrate: 16 Kbps.
1222 This option may improve clarity for music with snare drums,cymbals and vocals. If audio artifacts occur, encode with the Narrow Response option.\nFrequency response: 4.7 kHz Bitrate: 16 Kbps.
1223 This option gives the brightest sound for delivery over 28.8 modems. If audio artifacts occur, encode with the Medium Response option.\nFrequency response: 5.5 kHz Bitrate: 16 Kbps.
1224 Use for general stereo content.\n\nFrequency response: 4.0 kHz Bitrate: 20 Kbps.
1225 Use for general mono content over ISDN connections.\n\nFrequency response: 11 kHz Bitrate: 40 Kbps.
1226 Use for stereo content over ISDN connections.\n\nFrequency response: 8 kHz Bitrate: 40 Kbps.
1227 Use for optimal quality for mono content.\n\nFrequency response: 20 kHz (CD Quality)\nBitrate: 80 Kbps.
1228 Use for optimal quality for stereo content.\n\nFrequency response: 16 kHz (Broadcast Quality)\nBitrate: 80 Kbps.