sounds like an issue or a pull request on 
https://github.com/csound/manual would be great ...


On 21/09/2023 12:12, ST Music wrote:
> Hi Max,
> 
> based on the fact that this:
> 
> instr 1
>    asig oscil .8, 220, 1
>    ar1, ar2 hilbert asig
>    outs ar1, ar2
> endin
> 
> 
> 
> f 1 0 16384 10 1
> 
> i 1 0  4
> e
> 
> shows that ar1 is 90° (.25) out of phase with ar2, it would appear:
> 
> /ar1/ -- cosine output of /asig/
> 
> /ar2/ -- sine output of /asig/
> 
> is correct.
> 
> Best,
> Scott
> 
> On Thu, Sept 21, 2023, 5:05 a.m. Maximilian Marcoll 
>  > wrote:
> 
>     Hi everyone,
> 
>     I am a little confused by the documentation and examples of the
>     hilbert opcode:
>     http://www.csounds.com/manual/html/hilbert.html
>     
> 
>     The doc states:
> 
>     "ar1, ar2 hilbert asig
>     ar1 -- sine output of asig
>     ar2 -- cosine output of asig"
> 
>     But one paragraph later:
>     "ar1 corresponds to the cosine output of hilbert, while ar2
>     corresponds to the sine output. “
> 
>     Then later in the first example:
> 
>     ; aupshift corresponds to the sum frequencies.
>        aupshift = (amod1 - amod2) * 0.7
>       ; adownshift corresponds to the difference frequencies.
>        adownshift = (amod1 + amod2) * 0.7
> 
>     In the second example it is the other way around:
> 
>       aupshift = (amod1 + amod2) * 0.7
>       adownshift = (amod1 - amod2) * 0.7
> 
> 
> 
> 
>     Cheers
> 
>     Max
> 
>     ________________________________
> 
>     Prof. Maximilian Marcoll
>     Studio Director
>     Studio for Electroacoustic Music (SEAM)
>     University of Music/Franz Liszt/Weimar
>     Bauhaus University Weimar
> 
>     http://seam.hfm-weimar.de/ 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
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