[audacity4blind] Re: Amplification versus Gain

  • From: Gale Andrews <gale@xxxxxxxxxxxxxxxx>
  • To: audacity4blind@xxxxxxxxxxxxx
  • Date: Sat, 24 Aug 2013 14:54:46 +0100

| From Rich De Steno <ironrock@xxxxxxxxxxx> 
| Sat, 24 Aug 2013 09:29:40 -0400
| Subject: Amplification versus Gain
> David, just to clarify, let's say that I have a project going with four 
> tracks,
> three guitars and a vocal.  Let's say that the vocal is too low and I
> want to bring it up in relation to the guitars.  I select the vocal
> track and make sure that the guitar tracks are not selected.  I then
> press shift-g and enter 3, for example.  Do I still need to use the "mix
> and render" command, which I was never aware of before this, or is
> pressing shift-g and entering 3 sufficient?

SHIFT + G and increase the gain is sufficient for listening to the 
file and exporting it. 

The point is that the gain does not write the gain change to the 
audio data (and if you could see the waveform, does not modify 
the waveform height). 

The difference is that if you tried five different gain settings and did
Mix and Render after each settings change,  you would have written 
a lot of extra audio data. That could lead you to run out of disk space 
if you were short of space and had tracks that were several hours 


> On 8/24/2013 8:30 AM, David Bailes wrote:
> > Hi Rich,
> > although amplification and gain do roughly the same thing, there are some 
> > differences.
> > The gain of track is applied to the whole track, and is only applied when 
> > the track is
> > mixed for playback or export to a file, or when you use the mix and
> > render command. Changing the gain, doesn't affect the amplitude of the
> > audio data in the track.
> > The amplify effect can be applied to a time range in one or more tracks. It 
> > changes
> > the amplitudes of the audio data in the track, and it ignores the gain 
> > settings of > the tracks.
> > If you select one or more tracks and choose mix and render on the tracks 
> > menu,
> > then in the resultant track, the gains of the tracks have been taken
> > into account, and the gain of the track is initially zero.
> > So for example, if you select a single track, set the gain to 3, apply the 
> > mix and > render command, the gain is applied to the audio data in the 
> > track, and
> > the gain is reset to zero.
> >   > David.
> >
> >   > ----- Original Message -----
> > From: Rich De Steno <ironrock@xxxxxxxxxxx>
> > To: audacity4blind@xxxxxxxxxxxxx
> > Cc:
> > Sent: Friday, 23 August 2013, 19:51
> > Subject: [audacity4blind] Amplification versus Gain
> >
> > Is there any difference between increasing the volume of a track through
> > the amplify selection in the Effects menu, and by pressing shift-g for
> > gain and entering a number?  If there is a difference, what is it?
> > Also, when I have a project of several tracks that are all unselected,
> > and then I record another track, select it, and check the level of that
> > last track in the amplify selection in the Effects menu, it always seems
> > to show a negative number no matter how quiet that last track is.  Why
> > is that?  Also, merely making this check on the selected last track
> > seems to make every track selected.  What is going on?

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