Hi,Yes. This is helpful, insightful. I'm still trying to get used to scheme
in snd.Thanks,Jim
>
> Message: 1
> Date: Sat, 11 Jul 2015 12:12:00 +0200
> From: anders.vin...@bek.no
> To: cmdist@ccrma.Stanford.EDU
> Subject: Re: [CM] scheme, snd, cm_patterns.scm
> Message-ID: <87io9rf1fz@bek.no>
> Content-Type: text/plain
>
> Hi James.
>
> The beauty of the pattern-streams is they are 'streams', embodying a
> pattern (eg. a 'heap' in the above example) together with a promise to
> deliver the next item whenever you need it.
>
> Typically you set up a generator and store a pointer to that, just like
> you've done:
>
> (define aaa (make-heap '(160 600.345 1000 400)))
>
> After that,
>
> (next aaa)
>
> will return the next item from aaa anytime you want one.
>
> Using a slightly modified version of your example, you could do
> something like:
>
> (let ((aaa (make-heap '(160 600.345 1000 400 ;set up a stream
> (with-sound (:output "MyTest.wav" :srate 48000 :channels 2
> :header-type mus-riff :statistics #t)
> (do ((st 0 (+ st 0.25)))
> ((>= st 2))
> (examp1 st 0.25
> (next aaa) ; next item from aaa
> 0.5 48000
>
> You'll find a general doc about Ricks patterns here:
>
> http://commonmusic.sourceforge.net/cm/res/doc/cm.html#patterns
>
> Many files included with CMs docs, esp. "doc/patterns1.scm" and
> "doc/patterns2.scm" - provide examples of setting up patterns and
> using these.
>
> -anders
>
>
>
> --
>
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>
> End of Cmdist Digest, Vol 87, Issue 7
> *
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