[chuck-users] LiSa SndBuf rate bug?

[mike clemow]

Okay, if I use a mono file, this works.  I guess there's something
about the way we're populating the LiSa object with the stereo file
that is only copying half the samples over somehow.  I'll keep at
it...

-Mike

On Sat, Nov 15, 2008 at 1:44 PM, mike clemow <gelfmuse at gmail.com> wrote:
> Yup!  That was definitely the problem with the speed.  Okay, cool, I'm
> not crazy.  ;-)
>
> I still only get the first half of the SndBuf in the LiSa object,
> however.  I'm trying to tease out why.
>
> -Mike
>
> On Sat, Nov 15, 2008 at 1:31 PM, Daniel Trueman <dtrueman at princeton.edu> wrote:
>> so, something like this should work for stereo and greater files:
>> //ugens
>> SndBuf buf;
>> LiSa lisa => dac;
>> //change this path to your own sample
>> "/Applications/Max5/examples/sounds/cello-f2.aif" => buf.read;
>> //set lisa buffer size to sample size
>> ( buf.samples() / buf.channels() )::samp => lisa.duration;
>> //transfer values from SndBuf to LiSa
>> for ( 0 => int i; i < buf.samples() / buf.channels(); i++ ) {
>>
>>
>>
>>     (buf.valueAt(i * buf.channels()), i::samp) => lisa.valueAt;
>>
>>
>>
>> }
>> //party on...
>> 1  => lisa.play;
>> 2. => lisa.rate;
>> //hang on until it's done...
>> lisa.duration() * 0.5  => now;
>> i've posted this on the LiSa examples wiki.
>> dt
>>
>> On Nov 15, 2008, at 1:02 PM, mike clemow wrote:
>>
>> I just downloaded the newest miniAudicle (0.1.3.9) and experience the
>> same behavior as before at 44100hz sampling rate.
>> -Mike
>> On Sat, Nov 15, 2008 at 12:52 PM, mike clemow <gelfmuse at gmail.com> wrote:
>>
>> I'm on Mac OS X 10.4.11 running at 44100.  However, it doesn't change
>> if I change the sampling rate.  I'm using Chuck 1.2.1.2 on the command
>> line.
>> hrm...
>> -Mike
>> On Sat, Nov 15, 2008 at 12:41 PM, Daniel Trueman <dtrueman at princeton.edu>
>> wrote:
>>
>> what platform are you on, and what sampling rate are you running at?
>> dt
>> On Nov 15, 2008, at 12:30 PM, Daniel Trueman wrote:
>>
>> hmmm... not sure what's going on. the example works as expected for me,
>> and as you describe how it should work (plays the whole file through at
>> twice speed), using the most recent release of miniaudicle and chuck. and
>> the last line should be lisa.duration() * 0.5 => now, though that shouldn't
>> affect what you hear.
>> dt
>> On Nov 15, 2008, at 12:16 PM, mike clemow wrote:
>>
>> Hi Dan,
>> I guess what I'm trying to say is that, when I run this example, I
>> only get the first half of the SndBuf into LiSa and it plays back at
>> half-speed when the rate is set to 1.  It seems to me, that this isn't
>> right.  Since, the example came with the rate set to 2 in order to
>> play back at normal speed, I assumed that you guys knew about this.
>> buf.samples() * 1::samp => lisa.duration;
>> This should (however you choose to write it) create a buffer equal in
>> size to the SndBuf.
>> for ( 0 => int i; i < buf.samples(); i++ ) {
>>        //args are sample value and sample index (dur must be integral in
>> samples)
>>        lisa.valueAt(buf.valueAt(i), i::samp);
>> }
>> Here, I understand we're copying all the samples from SndBuf into LiSa.
>> 1  => lisa.play;
>> 2. => lisa.rate;
>> Playing back with a rate of 2 should make it play back twice as fast
>> as normal, if I understand this correctly, however, it doesn't seem to
>> do so.
>> lisa.duration() => now;
>> This should advance time long enough to hear the whole thing.  This is
>> true, but only because we have only the first half of the SndBuf in
>> LiSa, and we hear it twice.  This doesn't seem right to me, unless I'm
>> missing something.
>> -Mike
>>
>>
>> On Fri, Nov 14, 2008 at 9:24 PM, dan trueman <dtrueman at princeton.edu>
>> wrote:
>>
>> 'tis an example. change the line:
>> 2. => lisa.rate;
>> to whatever you want to get a different rate. just make sure you change:
>> lisa.duration() * 0.5 => now;
>> to an appropriate value as well, to make sure it plays long enough....
>> dt
>> On Nov 14, 2008, at 8:10 PM, mike clemow wrote:
>>
>> Hey folks,
>> In the below example (which you will all find in the LiSa-SndBuf.ck
>> file in examples in your installation), after populating the buffer in
>> the LiSa object with the values of the samples from SndBuf, the rate
>> of the LiSa object is set equal to 2. in order to play back normally.
>> Why is it not 1?  Why this should be the case makes little sense to me
>> and I respectfully submit this as a bug, unless someone can provide a
>> reasonable explanation.
>> Thoughts?
>> -Mike
>>
>> -----
>> //ugens
>> SndBuf buf;
>> LiSa lisa => dac;
>> //change this path to your own sample
>> "/Users/dan/Files/Chuck/LiSa_examples/TomVega.wav" => buf.read;
>> //set lisa buffer size to sample size
>> buf.samples() * 1::samp => lisa.duration;
>> //transfer values from SndBuf to LiSa
>> for ( 0 => int i; i < buf.samples(); i++ ) {
>>       //args are sample value and sample index (dur must be integral in
>> samples)
>>       lisa.valueAt(buf.valueAt(i), i::samp);
>> }
>> //party on...
>> 1  => lisa.play;
>> 2. => lisa.rate;
>> //look at some of the data
>> //returns value at given time, with linear interpolation
>> <<< Std.rand2f( 0., lisa.duration() / 1::samp ) :: samp  =>
>> lisa.valueAt
>>
>> ;
>>
>> //hang on until it's done...
>> lisa.duration() * 0.5 => now;
>> --
>> http://michaelclemow.com
>> http://semiotech.org
>> _______________________________________________
>> chuck-users mailing list
>> chuck-users at lists.cs.princeton.edu
>> https://lists.cs.princeton.edu/mailman/listinfo/chuck-users
>>
>> _______________________________________________
>> chuck-users mailing list
>> chuck-users at lists.cs.princeton.edu
>> https://lists.cs.princeton.edu/mailman/listinfo/chuck-users
>>
>>
>>
>> --
>> http://michaelclemow.com
>> http://semiotech.org
>> _______________________________________________
>> chuck-users mailing list
>> chuck-users at lists.cs.princeton.edu
>> https://lists.cs.princeton.edu/mailman/listinfo/chuck-users
>>
>> _______________________________________________
>> chuck-users mailing list
>> chuck-users at lists.cs.princeton.edu
>> https://lists.cs.princeton.edu/mailman/listinfo/chuck-users
>>
>> _______________________________________________
>> chuck-users mailing list
>> chuck-users at lists.cs.princeton.edu
>> https://lists.cs.princeton.edu/mailman/listinfo/chuck-users
>>
>>
>>
>> --
>> http://michaelclemow.com
>> http://semiotech.org
>>
>>
>>
>> --
>> http://michaelclemow.com
>> http://semiotech.org
>> _______________________________________________
>> chuck-users mailing list
>> chuck-users at lists.cs.princeton.edu
>> https://lists.cs.princeton.edu/mailman/listinfo/chuck-users
>>
>> _______________________________________________
>> chuck-users mailing list
>> chuck-users at lists.cs.princeton.edu
>> https://lists.cs.princeton.edu/mailman/listinfo/chuck-users
>>
>>
>
>
>
> --
> http://michaelclemow.com
> http://semiotech.org
>



-- 
http://michaelclemow.com
http://semiotech.org