HeadAC3he: Is Dual Channel the best audio for mp2?
Hi All,
I searched Doom9 for answers about the best audio (stereo, joint stereo, and dual channel) for mp2. The confusion about which was the best could keep you reading for every. What I could gleen, most agreed that Dual Channel was useful for carring two languages since it splits the audio bitrate between left and right channel (i.e. 128kb is 64kb right and 64kb left.) This means I can switch to English from one channel or French on the other. But as for better sound quality DC is less then stereo and joint stereo. Most felt that Joint Stereo was the best choice overall. I read a post by Kwag that it's always best to use Dual Channel. Can this always be true ??? Thankx :) |
Re: Is Dual Channel the best audio for mp2...???
Quote:
There is no difference in bit rate between stereo or dual-channel. Quality wise, at lower bit rates, joint-stereo wins. But then you loose "Dolby Surround" information. The best "Stereo" mode is indeed "Dual-channel" You can try it yourself very quickly. Encode say 60 seconds of audio in stereo, and the same 60 seconds dual-channel. Difference in file size? None. So you have the same bit rate for both. The difference is that in dual channel there's no "cross channel" of relation from left to right or right to left. No "bleeding" or "cross talk" between channels at all. That's why it's perfect for two separate languages. If you try two languages with stereo, say spanish on left track and english on right track, when you play back and you switch your balance complete to say right channel, you'll still hear audio artifacts from the adjacent channel. This doesn't happen in dual channel mode, and that's why it's ideal as "Dolby Surround" carrier for our (XYX)VCD's :lol: Hope that was clear :roll: -kwag |
Hi Kwag,
You are right. :D I tried 60 seconds of "The Matrix" using Stereo, Joint Stereo and Dual Channel. Dual Channel is the best quality compared to the others. It's similar to surround sound quality. It seems that BeSweet does not support dual channel using 2lame. Another reason to use Headac3he. I extracted audio from Divx(avi) using VirtualDub as wav (which was really mp3 with a wav header). Tried to convert the renamed .mp3 to wav uncompressed using BeSweet since Headac3he wouldn't convert it. Then used Headac3he to convert wav to mp2 dual channel. Thankx :) |
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