From j_hearon at hotmail.com  Thu Sep  6 10:51:00 2018
From: j_hearon at hotmail.com (James Hearon)
Date: Thu, 6 Sep 2018 17:51:00 +0000
Subject: [CM] env->channel, and float-vector->channel
Message-ID: <MWHPR1001MB2080A2E3510FF2BDF6232333E5010@MWHPR1001MB2080.namprd10.prod.outlook.com>

Hi,
I'm having some confusion about successive edits using env->channel vs. float-vector->channel.  For example if I loop employing env-channel and a vector as an envelope, then I see the successive edits every 1k samples; but when I try to do that using float-vector->channel the spacing is squished.

Float-vector->channel works fine if I employ the vector as envelope across the whole snd., but I'm failing to understand how to employ it for successive back-to-back edits within the snd.

Thank you for Snd 18.7!

Regards,
Jim


(set! (mus-srate) 48000)

 (let*   ((mysize 8) ;size of vector for envelope pairs
         (fsize 48000) ;size of the snd
         (myvec (make-float-vector mysize))
         )
   (new-sound "test.snd" :size fsize)
(insert-silence 0 fsize)
 (map-channel (lambda (y) 0.5))

(float-vector-set! myvec 0 0.1);x1
(float-vector-set! myvec 1 0.5 );y1
(float-vector-set! myvec 2 0.5 );x2
(float-vector-set! myvec 3 1.0 );y2
(float-vector-set! myvec 4 0.75 );x3
(float-vector-set! myvec 5 -1.0 );y3
(float-vector-set! myvec 6 1.0 );x4
(float-vector-set! myvec 7 0.0 );y4

  (do ((i 0 (+ i 1000)))
            ((= i 24000))
(env-channel (make-env myvec :duration 0.015 :scaler 1.0) i 1000 0 0 )
;(float-vector->channel myvec i 1000 0) ;place float-vector in the editor ;XXX
))
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From bil at ccrma.Stanford.EDU  Thu Sep  6 11:30:10 2018
From: bil at ccrma.Stanford.EDU (bil at ccrma.Stanford.EDU)
Date: Thu, 06 Sep 2018 11:30:10 -0700
Subject: [CM] env->channel, and float-vector->channel
In-Reply-To: <MWHPR1001MB2080A2E3510FF2BDF6232333E5010@MWHPR1001MB2080.namprd10.prod.outlook.com>
References: <MWHPR1001MB2080A2E3510FF2BDF6232333E5010@MWHPR1001MB2080.namprd10.prod.outlook.com>
Message-ID: <b1f4d4784405be5bf9616895019b0491@ccrma.stanford.edu>

You're talking about the length of each blip?  In the
env-channel case, the vector is treated as an envelope
and applied to .015 seconds of samples, but in the
float-vector->channel case, the vector itself is simply
copied into the file.  It only has 8 samples, so in the
float-vector->channel case, the blips are 8 samples wide,
rather than .015 * 48000 = 720 samples.

(By the way, I think you don't need the insert-silence
statement -- it just adds 48000 samples to the overall
file length).



From j_hearon at hotmail.com  Fri Sep  7 10:13:09 2018
From: j_hearon at hotmail.com (James Hearon)
Date: Fri, 7 Sep 2018 17:13:09 +0000
Subject: [CM] env->channel, and float-vector->channel
In-Reply-To: <mailman.1.1536260402.9354.cmdist@ccrma.stanford.edu>
References: <mailman.1.1536260402.9354.cmdist@ccrma.stanford.edu>
Message-ID: <MWHPR1001MB20809D707557DB6F6D082300E5000@MWHPR1001MB2080.namprd10.prod.outlook.com>

Hi,
Thank you for that info.  I understand now where I was getting confused re: float-vector->channel and see I need to adjust the vector size as I go.  Clear now.

Regards,
Jim
________________________________
From: cmdist-bounces at ccrma.Stanford.EDU <cmdist-bounces at ccrma.Stanford.EDU> on behalf of cmdist-request at ccrma.Stanford.EDU <cmdist-request at ccrma.Stanford.EDU>
Sent: Thursday, September 6, 2018 7:00 PM
To: cmdist at ccrma.Stanford.EDU
Subject: Cmdist Digest, Vol 124, Issue 2

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Today's Topics:

   1. env->channel, and float-vector->channel (James Hearon)
   2. Re: env->channel, and float-vector->channel
      (bil at ccrma.Stanford.EDU)


----------------------------------------------------------------------

Message: 1
Date: Thu, 6 Sep 2018 17:51:00 +0000
From: James Hearon <j_hearon at hotmail.com>
To: "cmdist at ccrma.Stanford.EDU" <cmdist at ccrma.Stanford.EDU>
Subject: [CM] env->channel, and float-vector->channel
Message-ID:
        <MWHPR1001MB2080A2E3510FF2BDF6232333E5010 at MWHPR1001MB2080.namprd10.prod.outlook.com>

Content-Type: text/plain; charset="iso-8859-1"

Hi,
I'm having some confusion about successive edits using env->channel vs. float-vector->channel.  For example if I loop employing env-channel and a vector as an envelope, then I see the successive edits every 1k samples; but when I try to do that using float-vector->channel the spacing is squished.

Float-vector->channel works fine if I employ the vector as envelope across the whole snd., but I'm failing to understand how to employ it for successive back-to-back edits within the snd.

Thank you for Snd 18.7!

Regards,
Jim


(set! (mus-srate) 48000)

 (let*   ((mysize 8) ;size of vector for envelope pairs
         (fsize 48000) ;size of the snd
         (myvec (make-float-vector mysize))
         )
   (new-sound "test.snd" :size fsize)
(insert-silence 0 fsize)
 (map-channel (lambda (y) 0.5))

(float-vector-set! myvec 0 0.1);x1
(float-vector-set! myvec 1 0.5 );y1
(float-vector-set! myvec 2 0.5 );x2
(float-vector-set! myvec 3 1.0 );y2
(float-vector-set! myvec 4 0.75 );x3
(float-vector-set! myvec 5 -1.0 );y3
(float-vector-set! myvec 6 1.0 );x4
(float-vector-set! myvec 7 0.0 );y4

  (do ((i 0 (+ i 1000)))
            ((= i 24000))
(env-channel (make-env myvec :duration 0.015 :scaler 1.0) i 1000 0 0 )
;(float-vector->channel myvec i 1000 0) ;place float-vector in the editor ;XXX
))
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------------------------------

Message: 2
Date: Thu, 06 Sep 2018 11:30:10 -0700
From: bil at ccrma.Stanford.EDU
To: James Hearon <j_hearon at hotmail.com>
Cc: "cmdist at ccrma.Stanford.EDU" <cmdist at ccrma.Stanford.EDU>
Subject: Re: [CM] env->channel, and float-vector->channel
Message-ID: <b1f4d4784405be5bf9616895019b0491 at ccrma.stanford.edu>
Content-Type: text/plain; charset=US-ASCII; format=flowed

You're talking about the length of each blip?  In the
env-channel case, the vector is treated as an envelope
and applied to .015 seconds of samples, but in the
float-vector->channel case, the vector itself is simply
copied into the file.  It only has 8 samples, so in the
float-vector->channel case, the blips are 8 samples wide,
rather than .015 * 48000 = 720 samples.

(By the way, I think you don't need the insert-silence
statement -- it just adds 48000 samples to the overall
file length).



------------------------------

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Cmdist mailing list
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https://cm-mail.stanford.edu/mailman/listinfo/cmdist


End of Cmdist Digest, Vol 124, Issue 2
**************************************

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From michael.gogins at gmail.com  Sun Sep 16 09:52:22 2018
From: michael.gogins at gmail.com (Michael Gogins)
Date: Sun, 16 Sep 2018 12:52:22 -0400
Subject: [CM] Composing in Lisp
Message-ID: <CAFswGP3ejijbmxufaE5kVZXz5py13uDOUqS9NEENrBoDT3tb3Q@mail.gmail.com>

This is party a reply to the question whether people are still using
Common Music version 2, i.e. the Common Lisp version, and party some
news.

Yes, I am using the Common Lisp version of Common Music, partly
because it has been extended with Drew Krause's code, and partly
because I find that the Common Lisp world is a bigger and deeper world
world than the Scheme world.

For my news, see:

https://michaelgogins.tumblr.com/post/178126207468/composing-in-lisp

Regards,
Mike

-----------------------------------------------------
Michael Gogins
Irreducible Productions
http://michaelgogins.tumblr.com
Michael dot Gogins at gmail dot com