Re: [Qtractor-devel] Big trouble when recording masterout or master monitor

[Ralf M. <ral...@al...>]

Rui Nuno Capela wrote:
> On 11/21/2009 05:56 PM, Mathias Krause wrote:
>   
>> Wow folks,
>>
>> i got the problem. (At least i hope). I used a ladspa plugin called 
>> "single band parametric". This plugin produces (together with a special 
>> sound which comes at the end of the track) this bias. The bias gets so 
>> high, that it totally destroyed everything. Cool! ....
>>
>> I'll take another plugin now, and try again ...
>>
>> at the end.... AGAIN ... the failor was ... how was that thing ... (in 
>> front of the keyboard: ifok)?
>>
>>     
>
> (pebcak or pebkac? :)
>
> but i really think it's not the case. plugins maybe godsend and evil at
> the same time. never trust no plugin ;)
>
> maybe you can use jack bitmeter (formerly bitscope) to diagnose what is
> going wrong with that particular plugin output
>   http://devel.tlrmx.org/audio/
>
> cheers

OT:

Maybe this is the cause that I only can use JACK2, but not JACK1 on my 
machine:


        Denormal

Samples too small to be represented in an ordinary JACK 32-bit float but 
not small enough to be zero are denormals. Obviously too small to be 
significant in playback, denormals are a problem if naive signal 
processing algorithms attempt to do arithmetic operations on them. Such 
operations are very slow on denormals and can cause a plug-in or 
application to exceed its allowable processing time and be kicked from 
the JACK graph.

http://devel.tlrmx.org/audio/bitmeter/