Casting [Char] to Pattern Note

Questions and Answers
1

I want to pass different note patterns I'm using as chord progressions to a function to manipulate them in various ways. When I do so, it returns a [Char] which can't be read. Here is a simple example:

prog1 = "[g4,c5,d5,e3] [f4,as4,ds5,g3] [g4'sus2,b3] [fs4'sus2,as3]"
prog2 = "{"++prog1++"}%3" -- this works but creates a [Char]
d1 $ s "superpiano*4" # n prog2 -- expects a Note Pattern, not a [Char]

The console says this:

t> 
    • Couldn't match expected type ‘Pattern Note’
                  with actual type ‘[Char]’

I'm a Haskell newbie and have dug around a lot and experimented but am not able to get "{"++prog1++"}%3" to be a readable pattern for # n. Thanks for your help!

1 Like
2

Hey @sherwood! Tidalcycles needs to parse this list of chars. You can use the function parseBP_E (which stands for parse bol-processor \w exception). Btw this is how TidalCycles parses the mini-notation naturally.

This should work for you:

prog1 = "[g4,c5,d5,e3] [f4,as4,ds5,g3] [g4'sus2,b3] [fs4'sus2,as3]"
prog2 = "{"++prog1++"}%3" 

d1 $ s "superpiano" <| n (parseBP_E prog2)

Have fun :slight_smile:

6 Likes
3

Thanks, that works perfectly! Also, I use tidal looper A LOT, it's really great, thanks for that too.

1 Like
4

PS @mrreason Here is tidal looper in action, all sounds from my bansuri flute, projecting on giant dunes in the UAE desert with a dancer: Desert Improvisation Experiments on Vimeo

1 Like
5

I'm very happy to hear that you enjoy the tidal looper so much. I was blown away by your desert experiment. Another example that I didn't expect myself :slight_smile:

I plan to collect a few examples made with the looper and post them to the README on the GitHub page. If you don't mind, I'd link the video right along with it.

6

Please do, happy to hear that!