[PD] tabread2~ noisy output

peiman khosravi peimankhosravi at gmail.com
Wed Oct 30 16:05:30 CET 2013


Hello,

I tried with different bit depth and it doesn't make a difference.

It sounds like it has to do with sampling precision of phasor~. And the
fact that changing the sample rate makes a difference to the way that
vline~ works also suggests to me a global issue.

I'm actually using the 32-bid build for now as non of the externals I'm
using have been built for 64-bit.

Thanks
Peiman




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On 30 October 2013 12:01, William Brent <william.brent at gmail.com> wrote:

> I was thinking it might be related to your file's 24-bit sample encoding
> and was going to suggest soundfiler's "raw" message to be specific about
> that. But if you're getting perfect results with vline~ and not phasor~, it
> sounds like that's not the issue. Are you using the 64-bit Pd for OSX?
>
>
> On Tue, Oct 29, 2013 at 3:26 PM, peiman khosravi <peimankhosravi at gmail.com
> > wrote:
>
>> But it doesn't end there. It's also an issue with phasor~. At the right
>> sampling rate, it works with vline~ but not with phasor. As in phasor
>> introduces those noises.
>>
>>
>>
>>
>> *www.peimankhosravi.co.uk || RSS Feed<http://peimankhosravi.co.uk/miscposts.rss> ||
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>>
>>
>> On 29 October 2013 19:13, peiman khosravi <peimankhosravi at gmail.com>wrote:
>>
>>> I think I have it figured out. Problem was inconsistency between the PD
>>> sample rate and the soundfile's sample rate. Not sure how that works but it
>>> seems to add some sort of ring modulation to the result.
>>>
>>> P
>>>
>>>
>>>
>>>
>>> *www.peimankhosravi.co.uk || RSS Feed<http://peimankhosravi.co.uk/miscposts.rss> ||
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>>>
>>>
>>> On 29 October 2013 17:50, peiman khosravi <peimankhosravi at gmail.com>wrote:
>>>
>>>> Also, even with the array max size of 2^24 I'm still getting the
>>>> noise.
>>>>
>>>>
>>>>
>>>>
>>>> *www.peimankhosravi.co.uk || RSS Feed<http://peimankhosravi.co.uk/miscposts.rss> ||
>>>> Concert News <http://spectralkimia.wordpress.com/>*
>>>>
>>>>
>>>> On 29 October 2013 16:50, peiman khosravi <peimankhosravi at gmail.com>wrote:
>>>>
>>>>> Oh I see. So it's to do with the size of the array. Thanks for that.
>>>>>
>>>>> Now, is there a workaround, other than reading the file directly from
>>>>> the disk?
>>>>>
>>>>> Best,
>>>>> Peiman
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> *www.peimankhosravi.co.uk || RSS Feed<http://peimankhosravi.co.uk/miscposts.rss> ||
>>>>> Concert News <http://spectralkimia.wordpress.com/>*
>>>>>
>>>>>
>>>>> On 29 October 2013 12:56, Claude Heiland-Allen <claude at mathr.co.uk>wrote:
>>>>>
>>>>>> On 29/10/13 12:36, peiman khosravi wrote:
>>>>>>
>>>>>>> An
>>>>>>> artefact of the sample interpolation perhaps?
>>>>>>>
>>>>>>
>>>>>> No, of limited precision in the index:
>>>>>>
>>>>>> http://lists.puredata.info/**pipermail/pd-list/2012-07/**097073.html<http://lists.puredata.info/pipermail/pd-list/2012-07/097073.html>
>>>>>>
>>>>>>
>>>>>> Claude
>>>>>> --
>>>>>> http://mathr.co.uk
>>>>>>
>>>>>>
>>>>>>
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>>>>>
>>>>>
>>>>
>>>
>>
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>
>
> --
> William Brent
> www.williambrent.com
>
> “Great minds flock together”
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