If you've downloaded Csound from the ubuntu repositories, then I don't think there were any new versions since before the summer, so there have not been any changes to Csound. If you are building Csound from GIT, then there are possibly changes (but not in the APi).

Could you send us your CSD and java files?

Victor

On 4 Oct 2011, at 11:29, Michele Nasti wrote:

Hello, 

I'm new to CSound and I'm studying it for my final university project. I'm working on a program (in java) that plays a wave file with csound, and I use Java to modify the pitch of the audio played. (The project is more complicated than this, we want to "sing" every note played by a midi file). 

The csd file works just fine and I think the problem is not there: it just creates an instrument, reads the file in a table, than plays it adjusting pitch with avs opcodes. In Qutecsound, it works. 

My problem is when I just try to run the examples I found on the csound journal: http://www.csounds.com/journal/2006summer/SliderDemo.html . 

This is from 2006, now the example doesn't work anymore due to changes in the API. In another article (http://www.csounds.com/journal/issue9/JNBFrntEnd.html ) there is the corrected version of the SliderDemo project . 

My problem is that it worked fine before September; I went on holyday and when I came back it's not working anymore. I can't figure out what's happening. Is there anybody that can tell me where is the problem? API changed? 

I'm using Ubuntu 11.04, csnd.jar is downloaded from the repositories. I'm using netbeans but i have tried also with eclipse. 

If I try to run "SliderDemo.java" i get a "csound segmentation fault". 

Thanks for your time, I really appreciate it. 

Michele Nasti

Dr Victor Lazzarini

Senior Lecturer

Dept. of Music

NUI Maynooth Ireland

tel.: +353 1 708 3545

Victor dot Lazzarini AT nuim dot ie

Hi,

Remember that you can't access certain functions of the csound API
while csound is doing the control block processing, in particular,
reading or writing tables. Since you are using csPerfThread, you can
do all this on the csThread function callback so that it is done
between processing.

Cheers,
Andrés

On Fri, Oct 7, 2011 at 11:38 AM, Michele Nasti <michele.nasti@gmail.com> wrote:
> Hi All,
> Yes, I downloaded Csound from the ubuntu repositories, and I needed a lot of
> time to figure out that the problem was a threading issue. The Graphic
> interface breaks the csound performing thread, and I don't know why.
> However, I created a Java class that abstracts all the low level infos about
> working with csound. It is working great for now, however i haven't tested
> it a lot (and i'm having problems with the "stop" button). It can be useful
> if you want to understand what's going on, but you can't trust it will
> always work.
> Some little adjustaments must be made to match the package name and to set
> the proper csnd.jar path.
> I will continue to work on it, because I'm realizing a software that has to
> "sing" musical notes played by a midi file. It's purpose is to help blind
> people to play music, expecially children, without braille.
> Michele
> 2011/10/4 Victor Lazzarini <Victor.Lazzarini@nuim.ie>
>>
>> If you've downloaded Csound from the ubuntu repositories, then I don't
>> think there were any new versions since before the summer, so there have not
>> been any changes to Csound. If you are building Csound from GIT, then there
>> are possibly changes (but not in the APi).
>> Could you send us your CSD and java files?
>> Victor
>> On 4 Oct 2011, at 11:29, Michele Nasti wrote:
>>
>> Hello,
>> I'm new to CSound and I'm studying it for my final university project. I'm
>> working on a program (in java) that plays a wave file with csound, and I use
>> Java to modify the pitch of the audio played. (The project is more
>> complicated than this, we want to "sing" every note played by a midi file).
>> The csd file works just fine and I think the problem is not there: it just
>> creates an instrument, reads the file in a table, than plays it adjusting
>> pitch with avs opcodes. In Qutecsound, it works.
>> My problem is when I just try to run the examples I found on the csound
>> journal: http://www.csounds.com/journal/2006summer/SliderDemo.html .
>> This is from 2006, now the example doesn't work anymore due to changes in
>> the API. In another article
>> (http://www.csounds.com/journal/issue9/JNBFrntEnd.html ) there is the
>> corrected version of the SliderDemo project .
>> My problem is that it worked fine before September; I went on holyday and
>> when I came back it's not working anymore. I can't figure out what's
>> happening. Is there anybody that can tell me where is the problem? API
>> changed?
>> I'm using Ubuntu 11.04, csnd.jar is downloaded from the repositories. I'm
>> using netbeans but i have tried also with eclipse.
>> If I try to run "SliderDemo.java" i get a "csound segmentation fault".
>> Thanks for your time, I really appreciate it.
>> Michele Nasti
>>
>> Dr Victor Lazzarini
>> Senior Lecturer
>> Dept. of Music
>> NUI Maynooth Ireland
>> tel.: +353 1 708 3545
>> Victor dot Lazzarini AT nuim dot ie
>>
>>
>
>

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