Myriam, yes you are correct. I do include the song title in the task name, creating a link. I meant to say that I usually do not add multiple tags to make that connection. With RTM, some users make use of multiple tags to link projects and tasks. The other web based apps I have used; todoist and toodledo allow for subtasks to make this connection.

I found that the extra tagging or the physical nesting of tasks isn't necessary for me. Stating the task name clearly seems to be sufficient. Backing that up with a weekly review helps ensure each song / project has a next action.