The Music Store manages two types of products, songs and collections, if you want to display the albums (collections) in each of genre pages, I suppose you are using the premium version of plugin because the free version doesn't include collections.
In this case follow the steps below:
1. Creates the pages for each genre.
2. Go to the genre's page and press the shopping cart button over the content editor, this action displays the insertion dialog:
If you want to display only the collections, select "collections" in the option "Filter results by products type", and selects the corresponding genre in the option "Filter results by genre"