If your post contains audio, then you should use this post format. Select Audio in the appeared metabox and add link to your mp3 file....
Product #5
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Product #3
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed blandit massa vel mauris sollicitudin dignissim. Phasellus ultrices tellus eget ipsum ornare molestie scelerisque eros dignissim....
Product 2
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed blandit massa vel mauris sollicitudin dignissim. Phasellus ultrices tellus eget ipsum ornare molestie scelerisque eros dignissim....