Peiman,

Sorry to be brief, but I'm wicked busy these days.  Check out this
Csound Blog entry for determining table size to the nearest power of
2+1:

http://csoundblog.com/2010/10/beat-mangler-x/

Here's an excerpt from the code:

; Get sample properties
    gibit filebit gS_sample                      ; Bit rate
    gichnls filenchnls gS_sample                 ; Number of channels
    gilength filelen gS_sample                   ; Length in seconds
    ioffset = gilength * ioffset                 ; Offset of sample
    gilength = gilength * isize                  ; Adjust length to user
                                                 ;     specified size
    gisr filesr gS_sample                        ; Sample rate
    gisize = 2 ^ ceil(logbtwo(gilength * gisr))  ; Table size
    gilength_s = gilength * gisr                 ; Length in samples


The second line from the bottom determines the table size.

Best,
Jake
-- 
The Csound Blog - http://csoundblog.com/
Slipmat - http://slipmat.noisepages.com/



On Tue, Nov 9, 2010 at 1:51 PM, peiman khosravi
 wrote:
> Hello,
>
> This is probably a very stupid question. I always use Diskin2 so I am not
> that familiar with reading samples from a table. What is the best way to
> read an entire sound file of an arbitrary length into a table (i.e. defer
> table size) and play it back without looping (preferably with high
> precision)? Of course I know how to read power-of-2+1 tables but that is not
> very convenient. Or maybe there is a way to automatically set the table size
> to the nearest power-of-2?
>
> I'm just doing some experiments with Cmask and would like to give this a
> shot for multichannel granular synthesis. Hopefully with grain-by-grain FFT
> processing.
>
> Also, is there a way to load in markers from the sound file into a table and
> then play from Nth marker to Nth marker (e.g. transient markers generated
> elsewhere)? I guess the answer is probably a UDO?
>
> Thanks in advance
>
> Best,
>
> Peiman
>


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on 2010-11-09 at 21:51 peiman khosravi wrote:

> Or maybe there is a way to automatically set the table size to the
> nearest power-of-2?


that's what the operator @ is for. just put [@xxx] as the table size (xxx
being the size in samples of your sound file). BTW, i couldn't find it
doing a quick search in the manual. is this just folkloric knowledge? or
is it documented in some non-obvious place?



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Why do you need to bother with power of two tables sizes? Perhaps I
misunderstood the original post...


On 9 November 2010 23:18, luis jure  wrote:
>
> on 2010-11-09 at 21:51 peiman khosravi wrote:
>
>> Or maybe there is a way to automatically set the table size to the
>> nearest power-of-2?
>
>
> that's what the operator @ is for. just put [@xxx] as the table size (xxx
> being the size in samples of your sound file). BTW, i couldn't find it
> doing a quick search in the manual. is this just folkloric knowledge? or
> is it documented in some non-obvious place?
>
>
>
> Send bugs reports to the Sourceforge bug tracker
>            https://sourceforge.net/tracker/?group_id=81968&atid=564599
> Discussions of bugs and features can be posted here
> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe csound"
>
>


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Hi Luis,

Yes! It is arcane folk knowledge that was never documented. I tried o
use it once, but since it didn't work for me I didn't document it...
Can you provide a simple example so I can add the documentation?
Does it work in the score only, or can you use it in the orc as well?

Cheers,
Andres

On Tue, Nov 9, 2010 at 11:18 PM, luis jure  wrote:
>
> on 2010-11-09 at 21:51 peiman khosravi wrote:
>
>> Or maybe there is a way to automatically set the table size to the
>> nearest power-of-2?
>
>
> that's what the operator @ is for. just put [@xxx] as the table size (xxx
> being the size in samples of your sound file). BTW, i couldn't find it
> doing a quick search in the manual. is this just folkloric knowledge? or
> is it documented in some non-obvious place?
>
>
>
> Send bugs reports to the Sourceforge bug tracker
>            https://sourceforge.net/tracker/?group_id=81968&atid=564599
> Discussions of bugs and features can be posted here
> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe csound"
>
>



-- 


Andrés


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tab supports non power of two tables size:

http://www.csounds.com/manual/html/tab.html

Rory.



On 10 November 2010 09:23, peiman khosravi  wrote:
> Only because non of the table-reading opcodes seem to be able to deal with
> non power of two (+ 1) tables. Or have I missed something?
>
> Thanks
>
> Peiman
>
> On 10 November 2010 00:34, Rory Walsh  wrote:
>>
>> Why do you need to bother with power of two tables sizes? Perhaps I
>> misunderstood the original post...
>>
>>
>> On 9 November 2010 23:18, luis jure  wrote:
>> >
>> > on 2010-11-09 at 21:51 peiman khosravi wrote:
>> >
>> >> Or maybe there is a way to automatically set the table size to the
>> >> nearest power-of-2?
>> >
>> >
>> > that's what the operator @ is for. just put [@xxx] as the table size
>> > (xxx
>> > being the size in samples of your sound file). BTW, i couldn't find it
>> > doing a quick search in the manual. is this just folkloric knowledge? or
>> > is it documented in some non-obvious place?
>> >
>> >
>> >
>> > Send bugs reports to the Sourceforge bug tracker
>> >            https://sourceforge.net/tracker/?group_id=81968&atid=564599
>> > Discussions of bugs and features can be posted here
>> > To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe
>> > csound"
>> >
>> >
>>
>>
>> Send bugs reports to the Sourceforge bug tracker
>>            https://sourceforge.net/tracker/?group_id=81968&atid=564599
>> Discussions of bugs and features can be posted here
>> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe
>> csound"
>>
>
>


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poscil & poscil3 also do.

Victor
On 10 Nov 2010, at 10:25, Rory Walsh wrote:

> tab supports non power of two tables size:
>
> http://www.csounds.com/manual/html/tab.html
>
> Rory.
>
>
>
> On 10 November 2010 09:23, peiman khosravi  
>  wrote:
>> Only because non of the table-reading opcodes seem to be able to  
>> deal with
>> non power of two (+ 1) tables. Or have I missed something?
>>
>> Thanks
>>
>> Peiman
>>
>> On 10 November 2010 00:34, Rory Walsh  wrote:
>>>
>>> Why do you need to bother with power of two tables sizes? Perhaps I
>>> misunderstood the original post...
>>>
>>>
>>> On 9 November 2010 23:18, luis jure  wrote:
>>>>
>>>> on 2010-11-09 at 21:51 peiman khosravi wrote:
>>>>
>>>>> Or maybe there is a way to automatically set the table size to the
>>>>> nearest power-of-2?
>>>>
>>>>
>>>> that's what the operator @ is for. just put [@xxx] as the table  
>>>> size
>>>> (xxx
>>>> being the size in samples of your sound file). BTW, i couldn't  
>>>> find it
>>>> doing a quick search in the manual. is this just folkloric  
>>>> knowledge? or
>>>> is it documented in some non-obvious place?
>>>>
>>>>
>>>>
>>>> Send bugs reports to the Sourceforge bug tracker
>>>>            https://sourceforge.net/tracker/?group_id=81968&atid=564599
>>>> Discussions of bugs and features can be posted here
>>>> To unsubscribe, send email sympa@lists.bath.ac.uk with body  
>>>> "unsubscribe
>>>> csound"
>>>>
>>>>
>>>
>>>
>>> Send bugs reports to the Sourceforge bug tracker
>>>            https://sourceforge.net/tracker/?group_id=81968&atid=564599
>>> Discussions of bugs and features can be posted here
>>> To unsubscribe, send email sympa@lists.bath.ac.uk with body  
>>> "unsubscribe
>>> csound"
>>>
>>
>>
>
>
> Send bugs reports to the Sourceforge bug tracker
>            https://sourceforge.net/tracker/?group_id=81968&atid=564599
> Discussions of bugs and features can be posted here
> To unsubscribe, send email sympa@lists.bath.ac.uk with body  
> "unsubscribe csound"
>



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on 2010-11-10 at 09:43 Andres Cabrera wrote:

>Yes! It is arcane folk knowledge that was never documented. I tried o
>use it once, but since it didn't work for me I didn't document it...
>Can you provide a simple example so I can add the documentation?
>Does it work in the score only, or can you use it in the orc as well?

well, i knew it was in the manual somewhere! it's under The Standard
Numeric Score -> Evaluation of Expressions:

http://csounds.com/manual/html/ScoreEval.html

i forgot that there's also @@, that evaluates to the next power-of-2+1. as
far as i know, these expressions work only in the score, and therefore
need square brackets [ ]. i used them only in f statements, and they
certainly worked.

there isn't much to put in an example, just that [ @ 11 ] will evaluate to
16, and [ @@ 11 ] to 17. at least two lines like these should be added in
the examples in the ScoreEval page, though.


cheers, 

lj




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Thanks, I've added a small note, but with a title to make it more prominent.

Cheers,
Andres

On Wed, Nov 10, 2010 at 11:49 AM, luis jure  wrote:
>
> on 2010-11-10 at 09:43 Andres Cabrera wrote:
>
>>Yes! It is arcane folk knowledge that was never documented. I tried o
>>use it once, but since it didn't work for me I didn't document it...
>>Can you provide a simple example so I can add the documentation?
>>Does it work in the score only, or can you use it in the orc as well?
>
> well, i knew it was in the manual somewhere! it's under The Standard
> Numeric Score -> Evaluation of Expressions:
>
> http://csounds.com/manual/html/ScoreEval.html
>
> i forgot that there's also @@, that evaluates to the next power-of-2+1. as
> far as i know, these expressions work only in the score, and therefore
> need square brackets [ ]. i used them only in f statements, and they
> certainly worked.
>
> there isn't much to put in an example, just that [ @ 11 ] will evaluate to
> 16, and [ @@ 11 ] to 17. at least two lines like these should be added in
> the examples in the ScoreEval page, though.
>
>
> cheers,
>
> lj
>
>
>
>
> Send bugs reports to the Sourceforge bug tracker
>            https://sourceforge.net/tracker/?group_id=81968&atid=564599
> Discussions of bugs and features can be posted here
> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe csound"
>
>


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Hi all,
just a small request: is it @@ macro working right for You?
Because i get same result of single @, i.e. always power of 2 and not power
of 2 + 1.

(i am on ubuntu, csound 5.12).

thank You,
ciao,
francesco.

Ok, apologies, i'm wrong again!
It's working.

ciao, francesco.