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Philip5E46
Participant
September 25, 2020
Answered

Sound gaps between appended clips that play consecutively from a CD.

  • September 25, 2020
  • 1 reply
  • 389 views

When I use Open Append> in Audition and select consecutive clips from a CD that plays without gaps, there is audible sound hiccups where the track breaks had been. I'm a beginner so thanks for explaining it simply to this computer savvy but non-sound engineer. Is this an automatic crossfade issue? 

Details: I'm using Windows 10 Pro and trying to combine an accompaniment track for my choir to record with. The CD I'm pulling from has the song broken into short clips that correspond to specific measures in the sheet music. 

This topic has been closed for replies.
Correct answer SteveG_AudioMasters_

This is to do with frame boundaries. If you break up a track and don't put each cut directly on a boundary point, there's no way that you'll end up with a gap-free transition if you try to rejoin tracks after ripping them. Each frame lasts 1/75th of a second, so that's the 'granularity' of the system. Whoever put the breaks in your CD clearly didn't understand anything about this - but hey, most people don't!

 

What happens is that if you make a cut where there isn't a frame boundary, the effect on the rip is that the rest of the frame after the cut will be filled with silence - which is where your hiccups come from. There's more information on the structure of CDs here. 

1 reply

SteveG_AudioMasters_
Community Expert
SteveG_AudioMasters_Community ExpertCorrect answer
Community Expert
September 25, 2020

This is to do with frame boundaries. If you break up a track and don't put each cut directly on a boundary point, there's no way that you'll end up with a gap-free transition if you try to rejoin tracks after ripping them. Each frame lasts 1/75th of a second, so that's the 'granularity' of the system. Whoever put the breaks in your CD clearly didn't understand anything about this - but hey, most people don't!

 

What happens is that if you make a cut where there isn't a frame boundary, the effect on the rip is that the rest of the frame after the cut will be filled with silence - which is where your hiccups come from. There's more information on the structure of CDs here. 

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Philip5E46Author
Participant
October 12, 2020

Thanks,

I think more than the CD writer, it had to do with bringing it in from iTunes (possibly because it's the Windows iTunes). I discovered 2 work arounds which were the overlooked function of importing from a CD (no gaps) and ripping it directly over a aux style cable. 

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