PlanetZ forums - scopeusers.com

Ok.. I did some thorough testing and have these new (as accurate as possible) results:

PEAK(in dB) / RMS avg(in dB) / DC offset(percentage)

0 / -4.78 / 0.4
-5.03 / -6.19 / 1.46

-0.5 / -5.26 / 0.12
-5.03 / -6.27 / 1.25

-1 / -5.78 / 0.05
-5.03 / -6.35 / 1.15

-2 / -6.77 / 0.16
-5.03 / -6.54 / 1.13

-3 / -7.78 / 0.07
-5.03 / -6.77 / 0.91

-4 / -8.76 / 0
-5.03 / -7.04 / 0.67

-5 / -9.76 / 0.13
-5.03 / -7.35 / 0.69

-6 / -10.77 / 0.01
-5.03 / -7.75 / 0.46

-8 / -12.75 / 0.14
-5.03 / -8.85 / 0.27

-10 / -14.77 / 0.25
-5.04 / -10.57 / 0.08

-12 / -16.76 / -0.2
-6.84 / -12.46 / -0.05

-15 / -19.78 / -0.29
-9.61 / -15.44 / -0.12

-20 / -24.77 / -0.05
-14.66 / -20.41 / -0.04

First line is the original recording of White Noise and second line of each group is the processed one. I use samples of white noise made by Soundforge 8.

I know it is difficult to read the test results like this.. I ve tried to make them more spaced by using "tab", but again the formatting is getting lost.

If one could enter them in excel and make some calculations, things would be a lot clearer...

As I said, I like what Tube Warmer does to the sound if the sound peaks at -5db.. if it is peaking more, I get an easily perceivable distortion, which to my ears doesn't sound good...

I have the suspicion that what I hear is pure digital distortion, and there is a hard limiter that limits the output signal to -5.03dB no matter what..
I think Tube Warmer should be calibrated so that this hard limit should be at -0.1dB. So that even when you feed it a 0dB signal, it doesn't distort...

What do you think?

P.S. I ve attached a .doc with the test results

I think you have to calibrate it like that:
- lower the "input gain" by 5dB
- calibrate the "output gain", so that when you feed a 0dB signal, the output doesnt distort, and the perceived level (RMS avg) is the same

Rodos, I can't thank you enough. That's some clinical tests you've done there, thanks! They match up very closely to what I have here, which is that I made the mistake of adding 5 dB to the output gain when I was tired at 6am (ish) in the morning.

I will update the warmer

...but sussing out the basic phase issues & workarounds is my current passtime & it's not a FUN one, I can tell you

Stay strong, Brotha' Man Shroomz.

Shroomz,

This is really good!

Many many thanks!

Should we make a version of this as a modular module?

YES YES YES

Very THANKS

Shroomz wrote:Should we make a version of this as a modular module?

Pleeeez?

Ok then

edit --- it's still not quite finished, but here's a link to the modular version of this for future reference >>>
http://www.planetz.com/phpBB2/viewtopic.php?t=21363

After thorough testing w/ my rig I decided for live keyboards that this version w/ all the filter options is perfect to use in the insert rack of FX in Solaris. On every preset I have custom Tube Filter Presets stored. I.E.....Oberheim XPander Strings are so FAT the HP filter works much better than using an equaliser to cut the lows. Zarg synths are now the ultimate, as they have ECC83S, Springtime, and SpaceF's delay sitting in the rack for every preset.

Thanks Sharc / Shroomz, Mehdi, Alfonso, and John Bowen,

Update !! - latest public beta version (v0.7)
-added presets ('Tube Filter.pre' file included in download at the top of page 1)

regards,
Shroomz

Thank You Brotha' Man Shroomz,
I like this filter very much. It works great on samples, and synths as well. The filter options, and resonance add alot of versatility. Could you make it as big as my LCD screen ? ....just kiddin'.



JV

Wasn't there a mono version aswell?

Yes, there was a mono version. It's still available in the 0.5 download. We'll post a mono version with presets at some point in the next few days.

cheers!!
Shroomz