Re: [LAD] [MusE-user] De-normals. (Was A small article about tools for electronic musicians)

Tim E. Real wrote:
> On May 1, 2010 08:10:27 pm Tim E. Real wrote:
>
>> On May 1, 2010 07:14:41 pm you wrote:
>>
>>> On Sat, May 1, 2010 at 8:57 PM, Tim E. Real <termtech@email-addr-hidden> wrote:
>>>
>>>> On April 30, 2010 10:55:09 pm you wrote:
>>>>
>>>>> Tim E. Real wrote:
>>>>> Wow, man! I just spent an hour playing with
>>>>> Guitarix Distortion (ladspa plugin) +
>>>>> caps C* Amp VTS (ladspa amp sim plugin)
>>>>> in MusE's plugin rack.
>>>>>
>>>> Silly me! I missed a piece of the puzzle. The C* Cabinet plugins.
>>>> I was supposed to put a cabinet after the amp.
>>>> Sounds even better now!
>>>> It now approaches the type of sound that the JCM900 vst gives.
>>>>
>>>>
>>>>>> Until now I have mostly been using SimulAnalog's famous JCM900 VST
>>>>>> dll plugin under dssi-vst. (I do wish they would open-source those
>>>>>> plugs!)
>>>>>>
>>>>> Aha, it's for free :), http://www.simulanalog.org/GSuite.zip, until
>>>>> now I didn't use VSTs when recording with Linux, but the web says,
>>>>> this VST should be awesome,
>>>>>
>>>> http://www.google.de/#hl=de&ei=vJLbS_jPJc6YOMjj9JIH&sa=X&oi=spell&resnu
>>>> m= 0&
>>>>
>>>>
>>>>> ct=result&cd=1&ved=0CAUQBSgA&q=JCM+900+VST&spell=1&fp=af503062d682e13a
>>>>>
>>>> I have not tried their other plugins in the suite yet, but the
>>>> following statement probably applies to them as well:
>>>> That JCM900 vst is by far the most absolutely mind-blowingly realistic
>>>> recreation of a Marshall amp *ever*. Most people agree.
>>>> It is *THE* standard by which *all* other plugins are judged,
>>>> commercial or free!
>>>>
>>>> Sadly, I just found out the hard way that it has a really nasty
>>>> denormalization problem. It's so bad I may not be able to use it any
>>>> more. People have tried fancy anti-denormalization plugins ahead of it,
>>>> with no luck, apparently.
>>>>
>>>> MusE has a basic DC anti-denormalization feature, and it didn't help.
>>>>
>>> I completely agree with you: The JCM900 VST rocks! I've been using it a
>>> lot on Windows, now I'm on the Mac, so I haven't used it in a while. Too
>>> bad the source code for these plugins is not available. The papers on the
>>> website only explain the basic principles.
>>> Anyway, I also ran into the denormalization problem quickly, so I just
>>> made a small VST that mixes some -100 dB white noise into the signal.
>>> Actually, I made the noise gain adjustable, because the added noise made
>>> my synth-guitars sound much more authentic. ;-)
>>>
>> Ha! Sounds good. Authentic hiss!
>>
>>
>>> Alternatively one could make it more convenient to use by creating a
>>> separate wrapper .dll that loads the JCM900 and just intercepts the
>>> process-calls, while passing any other call to the plugin.
>>>
>>> Jan
>>>
>> I tired a quick mod in MusE to do what the author of the caps ladspa suite
>> did to handle de-normals. He said "A -80dB signal at the Nyquist frequency
>> or lower". No luck.
>> But yeah, obviously at some signal level and type, it should stop.
>> So I'll keep trying. Noise sounds like the best way. -100dB white to start?
>> OK...
>>
>> Ugh. A new MusE options panel: Advanced de-normalization options, he he...
>>
>> Cheers. Keep on rockin'.
>> Tim.
>>
>>
>>>> Also Guitarix seems to have a slight issue too, but thankfully MusE's
>>>> basic anti-denormalization feature cured it.
>>>> (Many thanks to Robert for the painstaking work on that feature!)
>>>>
>>>>
>
> (CC'd MusE user list.)
>
> Hey thanks for the tip Jan! Right on!
> It worked! Man that is one SOB that's been plaguing me for a while.
> I didn't realize what was causing it until the other day.
>
> Turns out Guitarix needed more than just the DC, it needed the noise.
>
> -------------------
> To MusE users: No MusE mods required. Here's the way I did it:
>
> To avoid taking up an effect rack slot on each affected track, create a new
> Audio Input track with inputs not connected, with a single white noise
> ladspa plugin in its effect rack, say the caps C* White noise.
> Set the plugin's noise level to the second least value available, like 0.01.
>
> Un-mute the new Audio Input track.
> Name the track 'Noise source', let's say.
> Set the track level slider to -59dB, *NOT* -infinity, which causes the symptom.
> (That's the second least default minimum slider value, settable in options!)
>
> Now add 'Noise source' to each affected track's input routes, aside from any
> routes they already had.
>
> Note that if any Wave track effect rack plugins require the noise added,
> there's no way to inject the noise to their effect rack unless the Wave
> track's record-arm is on.
> So do like I usually do anyway... route your Wave tracks to Group tracks,
> and put the plugins in the Group tracks.
> Similar for other tracks like Synth tracks. Route them to Groups.
> Then inject the noise into the Group tracks.
>
> Well, you get the general idea I hope.
>
> Now things should be ready to roll smoothly.
>
> It's striking to adjust the 'Noise source' Audio Input track slider level
> to -infinity and all of a sudden things freeze and slow to a crawl.
>
> Don't do it!
>
> Tim.

IIUC in general, for any used recording app

1. Solution

When recording add parallel to the guitar's signal the noise (by caps C*
White noise) to the input of the plugin.

2. Solution

Add noise (by caps C* White noise) parallel to the outputs.

Ralf
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Received on Sun May 2 12:15:01 2010