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How do I raise the volume for portions of an mp3?
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As a test, if I highlight the lot, push the volume to 0 (holding comma moves that slider left), and then save the selection. Then open the file, hold period to move slider to the right, the sound is still there as soon as I don't think the saved file removes all sound or changes the sound at all.
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You asked "How do I raise the volume for portions of an mp3?". Not "How do I remove all sound?".Originally Posted by charlieship
Did you read the manual?
It certainly does change the volume, even down to zero. Or you can delete sections completely.
It can't actually create pure silence, though zero volume comes pretty close. Or you can find a bit that is silent and paste it over.
It works on the MP3 data directly, so there is no reencoding, thus no degradation, so for simple cut and paste edits or adjusting volume it's ideal.
If you want to do more complex audio editing get Audacity. That will convert it to the equivalent of wave, which you will have to export back to MP3 when done. -
I have read the manual about volume.
When I say I do something "As a test", it means just as a test. It doesn't mean that's what i'm trying to do, I said what i'm trying to do. 'm trying to raise the volume in the file. But a test is something i'm trying in order to see if I can at least get it to do that, to see if that works.
As a test, I tried highlighting a section, doing edit..gain making a change. And saving the whole audio, that worked and saved a change in the file.
I am unable to get anything like that with Volume though. I just see the volume bar, and can move it and it seems to change not the selection but just the volume at which the thing is currently playing. There is no change in the wave when I change the volume. I don't think any volume changes are saved into the file.
I wrote earlier that *As a test* I tried putting the volume to 0 i.e. let's see if I can get the volume to 0 or near 0, saved into the file. Whether I did select all, set volume to lowest, saved the audio. Did select all, set volume to highest, saved the audio. The output was identical. That volume control is only the volume that it plays at relative to the volume it is stored at, and it doesn't change the volume it is stored at.
But if you know how to get it to change the volume it is stored at, please let me know how. -
Correct.Originally Posted by charlieship
Applying gain changes the volume in the file.
The volume control is just the same as the Windows audio controls, doesn't change the file itself.
Though according to the manual, the gain dialog isn't the recommended way:
I mostly use it for simple cut and paste editing myself.Volume changes
To change the volume, simply create one or more edit points (from zero length selections, see above). Then you can directly change the gain by dragging the gray grips with the left mouse button. Alternatively the gain of the highlighted edit point can be changed by the keys Ctrl+Up/Down. To move an edit point, drag it with the right mouse button.
Audio ranges with a modified volume are shown in the color of edit points. The gain sign of the edit point shows the volume change in dB.
Note: Volume change works only with Layer 3. As the data remains encoded, volume changes can only be made in a resolution of 1.5 dB steps.
Using the Gain dialog is not recommended, because it is obsolete. Only for special purposes it may be useful, e.g. to make a silence. Fades should be be created with the drag method, or at least with the 'Create simple fade' function.
Experimenting, after creating some edit points as above, adjusting the gain "grip" on each, and saving, the resulting file certainly does have its volume changed.
(NB, misread your post earlier, changed my response.)Last edited by AlanHK; 27th Sep 2011 at 02:29.
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That doesn't just change the volume, it affects the sound/voice quality a lot. That is definitely not just an increase in volume.
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What is "that"?Originally Posted by charlieship
Anyway, I'm not an expert on this.
If you go to http://www.mpex.net/forum/viewforum.php?f=17 you can ask the creator of the program. He responds to sensible queries. -
Increasing the gain.Originally Posted by AlanHK
What is "that"?Originally Posted by charlieship
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Originally Posted by charlieship
If you think so, then don't use it. -
Dude I think we have a serious communication problem here.
I am asking how to increase the volume for portions of an mp3, and I want to just do that. Is there anybody else on this forum that can help? -
Why not edit the file in Audacity, make the changes as required and save as a new mp3. This way, you can see exactly what you're doing. The alternative is to contact the author of the above program.
Last edited by davexnet; 27th Sep 2011 at 11:18.
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@charlieship, maybe you should do a wiki lookup on "GAIN" and "VOLUME", because to audio engineers, IT'S THE SAME THING. In the parlance of that particular program, their "gain" adjustment can be done in segments and stored, their "volume" adjustment is global. If you don't like that, use a different program, though I don't think you'll find one exactly to your liking.
Even with the Replay Gain function, which is admirable as an approach, there are problems. For example: even though it's POSSIBLE to write new directly coded data to the MP3 without decoding, you're messing up the original balance created in the encode, particularly as it applies to MASKING, and the fact that there is not just ONE but MULTIPLE Fletch-Munson curves, though the ReplayGain algorithm only uses ONE.
So there are levels where your ears won't notice things (and can be ignored by the MP3 codec) and higher levels where it WOULD be noticeable and SHOULD have gotten encoded, and if you change it in one section from the lower to the higher level, you haven't "re-created" the missing info, so the perception would be wrong.
Scott -
Cornucopia - A google showed gain as input volume, and the volume i'm perhaps familiar with, as output volume, so to an engineer , output volume might be the right term.
sndrec32 can increase volume more and more, without causing the distortion that increasing gain in that program does. So they are doing different things -
And I've told you three times, and IT WORKED.Originally Posted by charlieship
You said so yourself.
MP3DirectCut is the only native MP3 editor I know that can do this.
If you want to decompress and recompress to MP3, you can use any number of audio editors, like Audacity, which I've also mentioned a few times.
If your ultimate aim is to reduce dynamic range, make quiet passages louder, use Audacity and the Compressor effect and it will do it automatically, without the clipping which seems to be what you are complaining about when you do it manually.Last edited by AlanHK; 27th Sep 2011 at 23:19.
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audacity does, though doesn't allow increasing the volume that much, not much amplification.
sndrec32 seems to be more flexible with increasing volume.. i'd like a program which can raise the volume of portions of an mp3, more than audacity can. -
You can't get higher volume IN THE FILE than you can by pushing the gain in either MP3DirectCut or Audacity.Originally Posted by charlieship
And the more you do that the more it will clip, as more and more of the waveform flattens out at the peak, creating distortion.
The output volume, what I guess you are talking about in sndrec, just multiplies the volume by whatever amount and sends it to the PC sound system and your limit them is the power of your amp and speakers.
What is your aim in doing this?
If you want to play music louder with less distortion, messing around with the MP3 file won't help. You need to invest in a better sound system.
If you want to reduce dynamic range, so the AVERAGE volume can be higher, then use "Compressor" as I mentioned -- that's what AM radio stations do, for instance. Podcasters often do it to make all the speech audible at normal volume.
That's a form of distortion as well, of course, but it isn't the brutal effect of clipping.Last edited by AlanHK; 28th Sep 2011 at 03:34.
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Sound Recorder? Seriously? You're talking about the "Adjust volume by 25%" or "Adjust volume by 100%" business, right?
Except according to sndrec's help file, "you can't adjust volume on compressed files, only uncompressed WAVs". Tells me that it won't work for your purposes like you were thinking it would. It's 1) baking in the change (requiring re-encoding) and 2) requiring a conversion to WAV first (which ANY good DAW or AudioEditor could do, and better) and 3) GLOBAL. Plus in sndrec there is nothing stopping you from clipping (or telling you that it's happening) until you hear it. It doesn't even have an UNDO!
Like AlanHK and I have been saying, either learn to work with MP3DirectCut (and he's made some good suggestions), or use a good audio editor (Audacity will do, but there are others) and live with re-encoding, or leave your files as-is. That's pretty much your choices (oh yeah, or write your own program).
Scott -
I use Audacity all the time to do this, works fine (that is if I understand what you are trying to do, the thread gets a little confusing). You might also investigate the dozens of plug-ins that make Audacity a power-house. There is one that I use (can't remember the name right now, I'm at work) that has an EXTREMELY powerful gain booster. I never tried it on sections, but worth a shot.
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ranchhand, can you let me know the name of the plugin when you can
i'll give the options another go.
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