Answer by mrkubodesign
Are you sure you have audio listener? You can also try 2D sound instead. Or you can try a simple script with OneShotAudio.
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You should download Breakable Glass Asset(https://www.assetstore.unity3d.com/en/#!/content/9800) These scripts in this asset may have answer to your question.
View ArticleAnswer by mrkubodesign
Go to import settings and change the "Scale factor" to your own value.
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