View Full Version : Why gain?
shadell
25th May 2006, 03:16
Why does Gordian Knot always use BeSweet's gain feature? I cannot think of any advantage of this in the general case - all the things I've encoded had good volume levels. I hear a slight fuzzyness from it. It it is bound to introduce rounding errors. And there doesn't appear to be a way to turn it off!
Is there a way to turn it off?
If not, please can one be added.
chromium
31st May 2006, 16:42
Why does Gordian Knot always use BeSweet's gain feature? I cannot think of any advantage of this in the general case - all the things I've encoded had good volume levels. I hear a slight fuzzyness from it. It it is bound to introduce rounding errors. And there doesn't appear to be a way to turn it off!
Is there a way to turn it off?
If not, please can one be added.
You probably refer to Auto Gordian Knot. In Gordian Knot, you can turn it off after selecting "Save and encode", and then on the Audio 1 tab, select mp3 custom parameters. I have no experience with Auto Gordian Knot.
Gaining probably makes most sense in combination with dynamic compression. Otherwise, it will have effect only when there are no spots with very high volume in the audio. Can't you just keep the original ac3 stream instead of transcoding to mp3?
BigDid
31st May 2006, 17:55
Why does Gordian Knot always use BeSweet's gain feature? I cannot think of any advantage of this in the general case ...
Hi,
If the question is regarding AGK, at that time ( sometime in 2003/2004?) Lenox had multiple demands/complaints about low volume audios. The only alternative was to demux the mp3, use mp3gain and mux again; not very auto-user friendly :(
Just searched in history it appeared at rev 0.85 alpha
You may want to try a similar approach: reuse the original ac3 audio (in agk temp folder) convert to mp3 with your settings, use VDM to disable the movie mp3 audio, mux yours, then save as using "direct stream copy".
Did
shadell
4th June 2006, 04:25
You probably refer to Auto Gordian Knot. In Gordian Knot, you can turn it off after selecting "Save and encode", and then on the Audio 1 tab, select mp3 custom parameters. I have no experience with Auto Gordian Knot.
No, I refer to Gordain Knot. You cannot turn it off - "mp3 custom parameters" does not allow you to clear the OTA parameter.
Gaining probably makes most sense in combination with dynamic compression. Otherwise, it will have effect only when there are no spots with very high volume in the audio. I'm not using dynamic compression, so I think you agree with me that it doesn't make a lot of sense. All I want is to convert mp2s to mp3s, without any unnecessary modifications. Given the loss in quality I'm hearing, it may not make much sense when using dynamic compression either.
Can't you just keep the original ac3 stream instead of transcoding to mp3? It's not a sensible option. Typical audio bitrate for a TV recording I'm encoding is 256kbps. Lame --preset standard converts this to around 145kbps.
shadell
4th June 2006, 05:00
If the question is regarding AGK, at that time ( sometime in 2003/2004?) Lenox had multiple demands/complaints about low volume audios...... The only alternative was to demux the mp3, use mp3gain and mux again; not very auto-user friendly :( Just searched in history it appeared at rev 0.85 alpha Hi,
It wasn't about AGK (see above), but, interestingly, AGK does not modify the volume of my test file in any way - so it behaves in the way I want, and would expect. GK does, and in the process, somehow, reduces the clarity.
len0x
12th June 2006, 19:57
currently AGK doesn't use BeSweet at all...
BigDid
12th June 2006, 20:23
currently AGK doesn't use BeSweet at all...
Hi Lenox,
Will send a PM. Farewell :)
Did
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