[Fluxus] Noisy output from (gh)

[evan.raskob [lists]]

I wonder if this is related to what we see using (ga) on OS X where  
half of the jack audio buffer is zeros?

Are you on OS X?


On Dec 23, 2009, at 10:21 AM, Glauber Alex Dias Prado wrote:

> Chris Targett <xin at xlevus.net> writes:
>
>> Humm,
>>
>> Even after
>> * Blitzing all of Jack's preferences
> try increasing not only jack's buffer size(period) but also nperiod (3
> or higher)
>> * Using a buffer size in Fluxus of 2048
> Buffer size of fluxus has to be the same as jack.
>> * Using the 'dummy' JACK driver to bypass any dodgy audio devices
> dont use this, try alsa and make sure it is configured for your card.
>
> You can bypass jack with reading from a wav file directly as dave  
> mentioned, with:
> (process "somemusic.wav")
>
>>
>> I'm still getting the same result, everything is jumping around  
>> like crazy.
>> It's as if Fluxus was getting a fed bunch of zeros and then a big
>> surge of non-zeros to make up for it.
>>
>> Is there anything else I can try?
>>
>> Ta
>> Chris Targett
>>
>>
>>
>> On Tue, Dec 22, 2009 at 2:04 AM, Dave Griffiths <dave at pawfal.org>  
>> wrote:
>>> On Mon, 2009-12-21 at 12:52 +0000, evan.raskob [lists] wrote:
>>>>
>>>> On Dec 21, 2009, at 12:57 AM, Glauber Alex Dias Prado wrote:
>>>>>>>
>>>>>>> I thought it was the music I was listening to and used Jaaa to
>>>>>>> generate a pure sinewave but I still get the same result.
>>>>>>>
>>>>>>> Is this likely to be an issue with Fluxus, or
>>>>>>> something/bad-configuration in Jack?
>>>>> isnt the gh code not dependendant on jack, only on the audio
>>>>> sources?(audio file)
>>>>
>>>> This is true, but noisy audio in == noisy result, which can be  
>>>> due to
>>>> jack adding glitches and noise (this certainly happens to me a  
>>>> lot).
>>>
>>> If you read from a wav file jack isn't involved.
>>>
>>> It's much more likely to be a problem with the fft implementation in
>>> fluxus than anything to do with jack (which is specifically  
>>> designed to
>>> prevent clicks and glitches, and works pretty well in my  
>>> experience).
>>>
>>> cheers,
>>>
>>> dave
>>>
>>>

Evan Raskob
ML Studio
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United Kingdom

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