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Hello, I have a generated seq of pitches and would like to remove repeated pitches and also prevent a seq like  b5 f5 b5 ( where the pitch following f5 returns to the pitch before f5 in this case ).


I'm not sure if filter-repeat is what I need or some other function?


If I do   (filter-repeat 1 '(b5 b5 f5 b5 f5 a5 gs5 a5 fs5 bb5))  ,  the result is  (b5 f5 b5 f5 a5 gs5 a5 fs5 bb5)  

but what I want is         (b5 f5 a5 gs5 fs5 bb5)


There is a :seq arg but haven't had luck with that ( and don't understand what it does).



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Thank you Stephane.  But in that result, I see a5 gs5 a5 which is still a pitch ( a5 ) returning to the prior pitch.  What I'd like is  (b5 f5 a5 gs5 fs5 bb5).  It would be ok if a5 appeared again later in the seq, but I don't want it appearing so soon after the prior a5 if that makes sense. 


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  • 2 weeks later...

With the update (3.0.29349) you will be able to do that:

(filter-repeat 5 '(1 2 2 3 1 4 5 2 1 6 4 3 4 2 2 3 1 1 3) :position t)
=> (1 2 3 4 5 2 1 6 4 3 2 1)

(filter-repeat 5 '(b5 b5 f5 b5 f5 a5 gs5 a5 fs5 bb5) :position t)
=> (b5 f5 a5 gs5 fs5 bb5)

Please check the updated document.



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