However, here are some options depending on the context:
General:
* A set of tunes
* A selection of tunes
* A collection of tunes
* A repertoire of tunes
More specific:
* A medley of tunes (if they are blended together)
* A symphony of tunes (if they are grand and harmonious)
* A chorus of tunes (if they are lively and energetic)
* A cascade of tunes (if they flow one after the other)
Ultimately, the best choice depends on the specific situation and the type of tunes you're referring to.