Trouble creating a node which includes a range - neo4j

Question

I am working on making the framework for a music recommendation system (with data from Million Songs in a CSV file) by connecting songs in a graph database using neo4j. This is my first time using neo4j, but I have used SQL before.
So far I have three nodes: Song, Artist, and Tempo.
I have already created the relationship between artists and their songs, and now I'm trying to create a relationship between each song and a range of tempos.
I could just have each song have a relationship to a specific tempo (ex: 120bpm), however that would not be very useful since I would not then be able to backtrack from Tempo and see another song that's very close in speed (ex: 119 or 121bpm).
Therefore, I'm attempting to group my Tempo nodes (which are floats) from being one exact number (ex:120bpm) to a range such as 0-80 (classified as very slow), 81-100 (slow), 101-130 (moderate), ... etc.
I know it would theoretically be better not to have set groups of tempos, but I'm just beginning and it will be ok for now.
Each Song node has parameters title artistName tempo.
Each Artist node has parameters artistName title.
Each Tempo node has parameters tempo title.
I have tried using creating a new node via:
CREATE (Tempo {Tempo.tempo<80});
... and several other ways I can't remember right now. Anyone that knows how to do this or if it's possible?

Answer 1

You seem to be duplicating properties unnecessarily across multiple node labels, in a way that would prevent a given node from being related to multiple other nodes. For example, an Artist node should not have a title property, since that would tie that node to a specific Song. Every Song would presumably have a relationship to the appropriate Artist anyway, so there is no need to store the song's title in the Artist node.
Also, as #InverseFalcon suggested, you can represent a range by using a pair of properties, say min and max.
Here is an example of a path in a suitable data model:
(:Tempo {min: 0, max: 79})<-[:HAS_TEMPO]-(:Song {title: 'Foo'})<-[:PERFORMED]-(:Artist {name: 'Fred'})
There would be one Tempo node for each tempo range.
Using the above data model, this simple query will return all songs that have the same tempo range ($speed is a parameter indicating the specific tempo of interest):
MATCH (t:Tempo)
WHERE t.min <= $speed <= t.max
MATCH (t)<-[:HAS_TEMPO]-(s:Song)
RETURN s;
And this is how you'd return the distinct artists who have ever performed a song in the desired tempo range:
MATCH (t:Tempo)
WHERE t.min <= $speed <= t.max
MATCH (t)<-[:HAS_TEMPO]-(:Song)<-[:PERFORMED]-(a:Artist)
RETURN DISTINCT a;