[audacity4blind] Re: Vocal Tracks Never Perfectly Align in time

  • From: Gale Andrews <gale@xxxxxxxxxxxxxxxx>
  • To: audacity4blind@xxxxxxxxxxxxx
  • Date: Tue, 19 Nov 2013 07:49:18 GMT


I get the impression that Matthew's issue is that he needs blind steps
written out for him so as to perform the Latency Test:
http://manual.audacityteam.org/o/man/latency_test.html .

I had a thought for example that he may be able to use Analyze > 
Sample Data Export to export a Time Indexed list file, then open that
file to read the distance between the peaks of the recorded clicks.

Has anyone done the latency test non-visually and can they help 
Matthew out? Or is the best scheme to just do it by experimenting 
with the Latency Correction value until it sounds correct?  


| From Rich De Steno <ironrock@xxxxxxxxxxx> 
| Mon, 18 Nov 2013 08:16:16 -0500
| Subject: Vocal Tracks Never Perfectly Align in time
> It works perfectly for me, I guess it depends on your system.  In fact, I 
> must go to negative 300 for my music keyboard.
> Rich De Steno
> On 11/18/2013 7:41 AM, Matthew Orts wrote:
> > Isn't -200 a bit too much?
> >
> >     ----- Original Message -----
> >     *From:* Rich De Steno <mailto:ironrock@xxxxxxxxxxx>
> >     *To:* audacity4blind@xxxxxxxxxxxxx
> >     <mailto:audacity4blind@xxxxxxxxxxxxx>
> >     *Sent:* Monday, November 18, 2013 7:34 AM
> >     *Subject:* [audacity4blind] Re: Vocal Tracks Never Perfectly Align
> >     in time
> >
> >     FYI, I had to increase my latency correction to negative 200.
> >
> >     Rich De Steno
> >
> >     On 11/17/2013 7:49 PM, Matthew Orts wrote:
> >>     Hi, I'm having issues with recording vocals. When I record the
> >>     first track, the vocals are fine, but every subsequent track
> >>     after that, the tracks are out of step, even when I adjust the
> >>     latency. I have my latency audio bset to 50 and the latency
> >>     correction set to -130. The way I test the tracks is put my
> >>     headphones up to the mic so it picks up the backing track from
> >>     the headphones. I record about three tracks, and they're all out
> >>     of step with each other. I want the tracks to be perfectly in
> >>     time with each other. Using Audacity 2.0.5 with Win 7 Ultimate 64
> >>     Bit. Soundcard is IDT High Definition soundcard, could that be
> >>     part of the problem? Every subsequent track after the first one
> >>     has been recorded goes out of sync. So for example, say I'm
> >>     recording a vocal or instrument onto a track. I have the main
> >>     backing track as the primary track, and when I hit the record
> >>     button, I record instruments or vocals onto a new track. That
> >>     first newly recorded track would be out of sync with the backing
> >>     track. All subsequent tracks will be out of step with each other
> >>     the more I record, until it turns into a huge mess. I've attached
> >>     some sound files to give an example of tracks out of step and
> >>     what they should sound like while they are synced together. This
> >>     demonstration wasn't necessarily mixed with audacity, but is to
> >>     show an example of the latency issues I face when doing overdubs
> >>     and/or recording instruments. Audio Track 1 is the wav file with
> >>     tracks out of step, and audio track 2 is an mp3 of what the
> >>     tracks should sound like if they were perfectly aligned with each
> >>     other. Hopefully that helps?

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