[sc-users] Very strange feedback(?) problem. I need assistance.

[Batuhan Bozkurt]

I'm tinkering with Ringz a lot, and it keeps giving problems. But the 
bug may not be that exotic at all, it behaves odd by itself. When you 
blow ringz.ar for some reason, then stop your synth by [cmd .] and when 
you fix the problem and rerun your synth, Ringz starts up blown up and 
eventually gets back to normal, with a decaying feedback(similar to my 
previous problem).

Is this behaviour normal? I would expect it to start fresh, but it 
somehow remembers its old status.

You may try this:

{ Ringz.ar(WhiteNoise.ar(1), 410, 5) }.play //CAUTION turn down your 
monitors as LOW as possible, as this will blow up

now stop the synth and run this:

{ Ringz.ar(WhiteNoise.ar(0.0001), 410, 5) }.play //this will hurt too 
beware!

I'd expect that the fixed re-run would start fresh, but it instead 
starts with the feedback, back from where it left off, and will get to 
normal with a decaying feedback.
BB



Batuhan Bozkurt wrote:
> Julian Rohrhuber wrote:
>   
>> DynKlank is simply a bank of Ringz internally. So something else is 
>> going on here.
>>
>>   
>>     
> Yes, I was wrong. The problem is still there...
> Found that LocalIn-Out feedbacks in the neighboring synth is not the 
> issue. It can go weird with anything else running in parallel. But if 
> you don't have any other synths spawned at the same time, there is no 
> problem. Well...
>
> BB
>
>   
>>> Is it possible to try with Resonz? I tweaked the q but it is not ringing
>>> like ringz. I don't know the internals of the two filters so it may be
>>> irrelevant here.
>>>
>>> BB
>>>
>>> Batuhan Bozkurt wrote:
>>>     
>>>       
>>>>  Thanks very much for helping tracking this down James. Now I can stop
>>>>  blaming myself and continue working.
>>>>
>>>>  Info maybe will help if someone looks into it:
>>>>  I added a Trig.ar to the input of the Ringzs, the problem, still being
>>>>  present(also by itself this time, not connected to the other synth being
>>>>  present) is not that nasty anymore. So that line is now:
>>>>  Pan2.ar(Ringz.ar(noise * 2000 * noisEnv + Trig.ar(t_trig1 * 0.003, 0.001),
>>>>
>>>>  It still has some initial noise at beginning, but not that nasty, and it
>>>>  is not connected to the other synth with local feedback anymore. So I
>>>>  added a one more global safety env to rise from 0 to 1 at beginning as
>>>>  realtime attacks are not needed at this time, hopefully it will not
>>>>  cause any more problems for now.
>>>>
>>>>  BB
>>>>
>>>>  James Harkins wrote:
>>>>  
>>>>       
>>>>         
>>>>>  Don't know why it didn't break this afternoon... the problem is really
>>>>>  obvious here at home on my mac.
>>>>>
>>>>>  The problem is happening in some of the Ringz UGens -- but I have no
>>>>>  idea why.
>>>>>
>>>>>    unit 85 Ringz
>>>>>      in  5.51716e-06 6250.22 3.78455
>>>>>      out 857.808
>>>>>
>>>>>    unit 85 Ringz
>>>>>      in  2.81292e-08 172.766 0.976677
>>>>>      out 20220.1
>>>>>
>>>>>    unit 85 Ringz
>>>>>      in  2.83744e-07 225.52 1.25794
>>>>>      out -7079.2
>>>>>
>>>>>    unit 85 Ringz
>>>>>      in  7.98887e-07 404.075 2.32528
>>>>>      out -64.293
>>>>>
>>>>>  And in multiple tests, it's always unit 85 that breaks.
>>>>>
>>>>>  So we definitely have a bug, and from the look of it, a quite obscure
>>>>>  one. Someone's going to have to go in with Xcode debugger I think...
>>>>>  I'm not that 1337 though.
>>>>>
>>>>>  hjh
>>>>>
>>>>>
>>>>>  : H. James Harkins
>>>>>
>>>>>  : jamshark70 at dewdrop-world.net <mailto:jamshark70 at dewdrop-world.net>
>>>>>
>>>>>  : http://www.dewdrop-world.net
>>>>>
>>>>>  .::!:.:.......:.::........:..!.::.::...:..:...:.:.:.:..:
>>>>>
>>>>>
>>>>>  "Come said the Muse,
>>>>>
>>>>>  Sing me a song no poet has yet chanted,
>>>>>
>>>>>  Sing me the universal."  -- Whitman
>>>>>
>>>>>
>>>>>  ------------------------------------------------------------------------
>>>>>
>>>>>  _______________________________________________
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>>>>>  sc-users at create.ucsb.edu
>>>>>  http://lists.create.ucsb.edu/mailman/listinfo/sc-users
>>>>>  
>>>>>    
>>>>>         
>>>>>           
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>
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