[PD] Pitch envelope

Ed Kelly morph_2016 at yahoo.co.uk
Sun Mar 6 23:06:42 CET 2011

>> What I am looking for is a mathematical way to calculate the length of a 
>>transposition envelope relative to its effect on a finite-length sample, and so 
>> derive a length for the envelope that will allow the envelope and the sample to 
>>play out over the same duration. The transposition will continuously change 
>> the length of the sample, and so from my limited knowledge of mathematics I 
>>reckon it will take some integration of the breakpoint envelope to calculate 
>> number. I'm just not sure how to do this.

> you're computing exp(0.0577623*(y*120-60+pitch)) before a [line~].

> first you will have to explain why the [line~] ought to occur before the exp, 
>because that makes no sense to me.

Yes, I realised that the other day, and fixed it as-per enclosed patch.

> whenever i take a breakpoint segment and break it in two such that I get two 
>segments with the same slope, it shouldn't sound any different, but it has to 
> sound different if you do the exp (or any other non-affine changes) before the 

Well, at least it's a pitch envelope now, and not a speed envelope.


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