'Dolby surround' V 'Dolby surround 2' downmix differences?

Azid can downmix to: - mono, to play with mono amplifier - stereo, to play with stereo amplifier - dpl, to play with amplifier/receiver with dpl decoder and 4 channels Left, Right, Center and Surround - dpl II, to play with amplifier/receiver with dpl II decoder and 5 channels Left, Right, Center, Surround Left and Surround Right Each one is the best for each player. 112 Kb/s mp3 is only good for mono.

- Don't mistake mono, stereo, dpl, dpl II decode downmix with join stereo mp3 encode option. Isn't related. - Low bitrate affect very much to high frequencies (ssshh, birds) for stereo o dpl II downmix. - Use stereo mix to play with stereo speakers, or dpl II to play with a receiver with dpl II decoder and 5.1 speakers. I don't know what answer you can need more than this.

Subjective tests for me show j/s is far superior to stereo(mixed to dpl or dlp II) and is related for quality playback. Thanks for help, we will leave it at that.