Hi!

I begin to like Ogg, but i still have some basic questions.
I wasn't able to find anything about it here or in Google...


- What means "use 6db harder limiter" ?
I have found it the decoding options of Winamp's Ogg Vorbis plugin

- What does "preamp" do? - Any loundness modification?


Thx 4 any web links or direct posts!
384kbps

Hi. These are both ReplayGain features. The 6dB Hard Limiter will compress the audio to enable louder playback without clipping, and then you can also use the Preamp to raise (or lower) the volume of audio being fed to your soundcard. These options should be used in conjunction with the Clipping Prevention option.

Here is a link to a ReplayGain FAQ that may provide some valuable info on this subject.


Edit: While you're there, click "Contents" and read more about ReplayGain...interesting stuff.

There's no dependency between the two, this is incorrect.

But if you turn on the hard limiter and jack up the preamp to +12dB, what's to keep the signal from exceeding 1.0, and in turn, clipping? I was under the impression that clipping prevention would automatically adjust the signal during playback to prevent it from clipping no matter where you set the pre-amp. I didn't mean that these settings were dependant on each other, just that clipping prevention may keep the signal from clipping if you turn up the preamp (up to a point, anyway).

My source of data was (in part) this from the ReplayGain Clipping Prevention page...

2. Replay Gain will make loud dynamically compressed tracks quieter, and quiet dynamically uncompressed tracks louder. The average levels will then be similar, but the quiet tracks will actually have louder peaks. If the user pushes the pre-amp gain to maximum (which would take highly compressed pop music back to its original level), then the peaks of the (originally) quieter tracks will be pushed well over full scale.

3. If a track has a very wide dynamic range, then even without turning up the pre-amp, the replay gain itself may instruct the player to turn the track up such that it would clip, simply because the average energy is so low, but the peak amplitude is very high. If anyone does find a recording which causes this with the pre-amp gain set at 0, please let me know!

Hence, though not required, using this setting would be a good idea if you're turning up the preamp at all (I would think).


(BTW, not opposing your statement, just trying to learn so I'll know more details in the future. )

It's dependant on the players implementation. When there's a hard limiter clipping prevention makes less sense as that's the limiters job anyway.

Ah, now I see. Thank you!

Explained also here...

Hi again!

Thanks for your answers and all the information.
I believe i'm able to follow...
All my OGGs are already replaygained, by the way.


So i hope i'm right with this now:

- 'use 6db harder limiter' is somthing like a dynamic compression
used on/inside every single track, right?

- 'preamp' does not make any dynamic compression within a track,
but will reduce/lower the loundness difference between dynamically heavy
compressed tracks and tracks with a big dynamic range!?


384kbps