Guides Audiobundles: assetbundles for sounds

[atani]

atani submitted a new resource:

Audiobundles: assetbundles for sounds - How to create audiobundles

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Audio assetbundles

I'll start with this topic because this is the one you might find strange, why turn audio files into assetbundles? This advice comes from MacGruber's comments when I was perusing the forum.
If you use audio files in a assetbundle, loading is almost immediate and - I haven't compared yet, sorry - might be much softer on available RAM...

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[jpxrz]

Thanks for your tutorial! Now I finally know how to pack my dialogs to an assetbunble.
But I have a further question: I don't understand why the file size became much lager after compressed in Audio Options (Step 3B).
For example as below screen shot: I selected the Decompress On Load and PCM format, the Information box shows the Ratio is 74.06% which means the Imported Size will be from 8.3MB to 6.1MB

However, after I clicked the 'Apply' button, the file size enlarged from 8.3MB to 36.1MB, of which the Ratio is 437.29% (as below screenshot)

 

[atani]

I don't know much about the topic so I'm going to say my current understanding:

• PCM is uncompressed, so perhaps everything is explained just on that point. "Decompress on load" is probably meaningless when chosing PCM
• The first info box shows the current situation if you just pack as when imported and don't apply any changes (vorbis is default I think)
• The second box is the result of changing your original file to PCM, which is uncompressed, and possibly you start with a compressed format like mp3 or ogg

On the guide there's a link to this page explaining a lot more:

Unity Audio Import Optimisation - getting more BAM for your RAM

A guide to using Unity's audio import settings to help improve game performance.

www.gamedeveloper.com

 

[jpxrz]

I don't know much about the topic so I'm going to say my current understanding:

• PCM is uncompressed, so perhaps everything is explained just on that point. "Decompress on load" is probably meaningless when chosing PCM
• The first info box shows the current situation if you just pack as when imported and don't apply any changes (vorbis is default I think)
• The second box is the result of changing your original file to PCM, which is uncompressed, and possibly you start with a compressed format like mp3 or ogg

On the guide there's a link to this page explaining a lot more:

Unity Audio Import Optimisation - getting more BAM for your RAM

A guide to using Unity's audio import settings to help improve game performance.

www.gamedeveloper.com

Thank you for your kindly help. I've read the article and been aware of what impact those setting mean, I just curious why did the file size enlagred times original.
Anyway, I will try what actual impact of those different settings in practice.
Thank you again for your toturial, it did solve my trouble.

 

[atani]

It's because you chose PCM.
Honestly, for speech lines using Vorbis will keep the size much smaller and the CPU cost and audio quality difference will be negligible, I would use that.