| 摘要 |
<p>Methods, systems and machine readable programs on non-transient media for rating of products (such as pre-production digital products) are provided. A pre- production copy of a rhythmic audio composition (e.g. musical product) can be offered for sale online. The musical product can be rated based on a number of the sold pre-production recordings or streams, as well as other factors and purchasers may be rewarded for their music evaluation skills.</p> |
