I have several pieces of audio I need to import. The files are currently in .WAV format. Is there any reason I need to convert them to MP3? (i.e. file size, quality, etc....)
There's a trade-off. The WAVs will be much bigger in your source directory for a negligible benefit. WAVs are typically much larger but are typically not compressed. Compressing an MP3 at a high bitrate 128k will always result in a far smaller file but you risk compressing compression artifacts which will affect your final filesize and quality. It probably will be a very small consequence. I typically store as high bitrate MP3s.
Try a little experiment. Take a long WAV and convert it to a high bitrate MP3. Import each into separate, yet identical copies of a presentation. Export and take a look at the filesize difference and quality difference.
I predict you won't be able to tell the difference in audio quality (I can't) and the difference in filesize will be less than 1%. I may try this same experiment later today
I prefer to import 16 bit 44 khz PCM WAV files as I like to always have a copy of my original audio to work from. You can do some fun stuff like outlined here. When you import a .WAV file it is actually saved as a 192 kbps MP3 file so you don't really need to be concerned about file size either.
OK...I just took a stab at the importing the files. When I published it and uploaded to SCORM Cloud for a checkup, all I hear is a hissing sound. My audio did not import correctly. I will re-attempt to publish but are there some common causes to this that I can avoid?
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There's a trade-off. The WAVs will be much bigger in your source directory for a negligible benefit. WAVs are typically much larger but are typically not compressed. Compressing an MP3 at a high bitrate 128k will always result in a far smaller file but you risk compressing compression artifacts which will affect your final filesize and quality. It probably will be a very small consequence. I typically store as high bitrate MP3s.
Try a little experiment. Take a long WAV and convert it to a high bitrate MP3. Import each into separate, yet identical copies of a presentation. Export and take a look at the filesize difference and quality difference.
I predict you won't be able to tell the difference in audio quality (I can't) and the difference in filesize will be less than 1%. I may try this same experiment later today
Hey Dave.
I prefer to import 16 bit 44 khz PCM WAV files as I like to always have a copy of my original audio to work from. You can do some fun stuff like outlined here. When you import a .WAV file it is actually saved as a 192 kbps MP3 file so you don't really need to be concerned about file size either.
Thanks Justin....
Before I read this post, I imported them as the original .WAV files.....so I can then just leave them like they are then?
I appreciate the time!
Cheers,
Dave
Yep! You are good to go!
Hello,
OK...I just took a stab at the importing the files. When I published it and uploaded to SCORM Cloud for a checkup, all I hear is a hissing sound. My audio did not import correctly. I will re-attempt to publish but are there some common causes to this that I can avoid?
Cheers,
Dave
I"m guessing the WAV files need to be converted to 16 bit 44 KHZ PCM WAV files as outlined here;
http://www.articulate.com/support/presenter09/kb/?p=547
Hey Justin,
I think you nailed it. I converted the files and imported them, then did a preview. They worked great.
Thanks for the help!
Cheers,
Dave
Sure thing!
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