Hi,
I've been browsing this forum for many hours and found some usefull information. Thanks. So did I understand right this thing? Just type Y/N

CBR 256 stereo should produce the same quality as 128 joint stereo?
Does it use in stereo mode 128 for each channel?

Thanks

To JONH33
Is it recommended to use your updated versions of libMAD and nLame 3.90.3?
Is it possible to create an instaler with these versions?

Bye
Kvak

No.



I don't understand the question.

Just to make something clear... The difference between Simple Stereo and Mid/Side Stereo used in Joint Stereo is the following:

For Stereo, the audio is splitted into a left and a right channel which are sharing bits. That means that if you have selected 128 kbps for example and the left channel needs more bits than the right one, the encoder can assign 80 kbps to the left one and 48 to the right one. This is unlike Dual Mono where each channel is encoded at exactly 56 kbps (if 128 kbps is the target bit rate).
For Mid/Side Stereo, the audio is splitted into a middle and a side channel. While the middle which holds the sum of both channels gets more bytes, the side channel which only stores the difference between the left and the right channel uses less bytes. Mid/Side Stereo encoding is theoretically lossless (a very minor loss MIGHT be caused by rounding).

Edit: I think I understand your question now... The selected bit rate is the total bit rate for both channels. That means that if you have 128 kbps, the total ammount of bits available is shared.

64 kb/s for each channel to be exactly

OK, now I see it more clearly. Thanks.
So 128kbps Joint Stereo will produce better quality then 128kbps stereo.
But on higher bitrates it is better to use stereo mode than joint stereo. P.E. 256kbps is enought to have a fine quality. Did I understand it right?

Thanks.

hmmm....doesnt the use of joint stereo save bits?
that would then indicate more bits left for the encoder to use where it needs it.

i dont know the technical stuff very well but it seems to me that if the joint stereo function works properly then that would be the obvious choice for optimal results versus stereo mode at any bitrate. I realize this might be indistinguishable at 320 but isnt it anyway?

Please correct me if i am wrong

@kwak

No. thats not right. Using joint stereo is recommended at all bitrate settings.

You might want to read the list of recommended LAME settings and the "Why is joint stereo better than pure stereo ?" link in the FAQ.

I think you lied with the "I've been browsing this forum for many hours", or else that browsing didn't include the FAQ!

Newbies are welcome, but come on! There are FAQ entries on this stuff! And even recent threads.

Sorry to sound harsh, but the FAQ was put together for a reason. You're talking as if you haven't read a single thing on this board.

Cheers,
David.

Perhaps you are right, I've lost my patience very early. I have read tons of information here, I found them interesting and usefull, but I lost myself in it. Many topics seem to ansver me, but not exactly. A newbie like me have to read many threads to make an image how it works and what is the best for him. I've found recomended presets, but explanations of stereo modes stayed hidden from me :-)
So I asked.
Now I know. Thanks.

Kvak
CZ - Prague