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W
WG007
Known Participant
December 11, 2015
Question

Cp 9, audio issues

  • December 11, 2015
  • 1 reply
  • 464 views

Hi there, it's me again, a troubled Cp9 user.

I have a new issue, regarding audio playback:

  1. I work on a responsive project
  2. I attach audio files (mp3) as slide audio
  3. I view the output in Firefox (this is my client's requirement to use FF as the default browser)
  4. Audio files are sometimes and fully randomly being played with breaks or "stutter". This suggests to me, there is a loading problem, but the internet speed is high and the same output played in IE or Chrome does not make any problems. Every single audio file is not big. And as I've written above, no problem in other browsers except FF.

Does anybody encountered similar issue? Any idea, how to solve it (except converting an audio in a video file)?

Many thanks for your response(s).

This topic has been closed for replies.

1 reply

RodWard
Community Expert
RodWardCommunity Expert
Community Expert
December 12, 2015

Does this issue still occur if you record your audio as WAV instead and insert that as slide audio?

W
WG007Author
Known Participant
December 12, 2015

Rod, many thanks for your reaction.

The audio file is inserted as wav, then automatically converted into mp3.

Is there any difference when mp3 is inserted (converted by media encoder cc)?

RodWard
Community Expert
RodWardCommunity Expert
Community Expert
December 13, 2015

Captivate stores the audio internally in WAV format because it is less compressed than MP3 and therefor loses less data.  When you publish OUT to some format such as SWF or HTML5 then it publishes the WAV audio files to MP3 according to the audio quality settings you specify.

If you start with an MP3 file and insert that into Captivate you are already sacrificing some audio quality by virtue of the lossy compression the MP3 format uses.  This MP3 then gets converted and stored as WAV in the project Library so that the maximum amount of audio data can be preserved.  However, the original MP3 file also gets stored in the Captivate Library as well.  So importing as MP3 has no real benefit. You are just losing audio data and bloating the CPTX file as well.

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