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Topic: playlist generation using %rand() (Read 489 times) previous topic - next topic
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playlist generation using %rand()

I would like to generate a playlist where songs are more likely to appear if they are higher-rated. I have a procedure I use to do this, but I'd like to automate it. I thought one way to do this using facets might be to use the $rand() feature.  However, it doesn't seem to work like I expect when I run the following:

((%rating% IS 1) AND ("$rand()" GREATER 1717986918)) OR ((%rating% IS 2) AND ("$rand()" GREATER 1288490188)) OR ((%rating% IS 3) AND ("$rand()" GREATER 858993459))  OR ((%rating% IS 4) AND ("$rand()" GREATER 429496729)) OR ((%rating% IS 5))

My understanding, from the documentation, is that $rand() is not [0,1) bounded but goes to very large numbers. But it's also available only in some contexts. What light can you shed on the problem?

Thank y'all. fb2k is a great product.
stephen
 

Re: playlist generation using %rand()

Reply #2 –
You can create such playlists with my scripts (Playlist Tools) and probably with random pools component too.

But you can also create semi-random queries with other TF expressions, like:
Code: [Select]
(%rating% IS 3) AND ("$mod($crc32(%TITLE%),256)" GREATER 128)

Which would always give the same output, but it's a random playlist. Substitute title with a tag changed after playback, like %last_played%, and the query will also change everytime you play the track.

Code: [Select]
(%rating% IS 3) AND ("$mod($crc32(%last_played%),256)" GREATER 128)
Apply the same for every rating and you have your playlist.

You can also filter it even more, to directly exclude any track played recently
Code: [Select]
((%RATING% IS 3 AND "$mod($crc32(%LAST_PLAYED%),256)" GREATER 128) OR (%RATING% IS 4 AND "$mod($crc32(%LAST_PLAYED%),256)" GREATER 64) OR (%RATING% IS 5)) AND NOT %LAST_PLAYED% DURING LAST 2 WEEKS