Very simple project to add in a new upload feature on each product (in admin > categories.php) that allows the Shopowner to attach a sample MP3.
In the shop, if the person browsing is looking at a product that has a MP3 attached, a nice MP3 player appears.
Video (no sound):
Interested
Cost is 99 which includes installation, training and ongoing support. Get in touch to ask any pre-sales questions.