[audacity4blind] Re: Moving a track's starting position, relative to other tracks

  • From: David Bailes <david_bailes@xxxxxxxxxxx>
  • To: "audacity4blind@xxxxxxxxxxxxx" <audacity4blind@xxxxxxxxxxxxx>
  • Date: Mon, 19 Nov 2012 14:45:44 +0000 (GMT)

Hi Jacob,
glad to hear that you found a solution.
This note is just to point out that the selection start spin box on the 
selection bar provides a slightly quicker way of refining  the time shift.
Assuming that you've time shifted the second track to roughly the right 
position, the first track is not selected and the second is selected, and the 
cursor is at the start of the audio in the second track, then to do the 
1. press ctrl+f6 to move to the selection bar.
2. tab to the End/Length radio buttons and set to length.
3. tab to the selection start spin box, and move to the hundredths of seconds 
Then you can cycle round these three steps:
1. Move the cursor forward by 50ms by pressing up arrow five times, or move 
backwards by pressing down arrow five times.
2. Press alt, t, a, c to align the start of the second track with the new 
cursor position.
3. Press spacebar to start playback to hear whether the tracks are aligned, and 
spacebar again to stop.


From: Jacob Kruger <jacob@xxxxxxxxxxxxx>
To: audacity4blind@xxxxxxxxxxxxx 
Sent: Saturday, 17 November 2012, 17:18
Subject: [audacity4blind] Re: Moving a track's starting position, relative to 
other tracks

Ok, thanks for 
suggestions, etc. - think figured out a method/solution that works well enough 
for me now.

Basically, imported the two tracks - one being the 
audio import from the standard video clip file - and one being the narrated 
soundtrack of the same piece of content - and then making sure selection is 
active in longer original track that in fact matches the video content/footage 
as such, using enter key to toggle selection on and off for each track, I 
actually just used the [ key to then invoke the popup asking you to set the 
start of selection, and then used the menu item on the edit menu to move cursor 
to selection start, turned off selection for that track, moved over/down to 
narrated sound track, hit enter to turn on selection there, and then off align 
tracks menu item on tracks menu, told it to align track with cursor position, 
and while it took me a little bit of time to get the alignment right, since it 
was a bit difficult to figure out which one was then actually starting audio 
output first, did eventually manage to get it to sound pretty much right, by 
eventually going down to changing new starting position of narrated soundtrack 
bit by bit using differences coming down to 50 milliseconds at a time, after 
got it pretty close, such that it almost sounded like there was a very vague 
echo going on, until got it just right...<smile>

Anyway, now going to try use free software called 
virtualDub to in fact replace original/normal sound track of video clip/file 
over to the now matching combined track of both original soundtrack and 
soundtrack, and there you go...

Stay well

Jacob Kruger
Blind Biker
Skype: BlindZA
had broken his body, but not his spirit...'   

The audacity4blind web site is at

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