DSP Robotics Support

Posted: **Sun Jan 07, 2018 12:15 pm**

This is very strange then, and I haven’t seen anyone reporting this before

Maybe you could post your complete system spec including CPU, OS etc... ?
There have been a few issues with Windows 10...

Cheers

Spogg

Posted: **Sun Jan 07, 2018 4:46 pm**

Spogg wrote:This is very strange then, and I haven’t seen anyone reporting this before

Maybe you could post your complete system spec including CPU, OS etc... ?
There have been a few issues with Windows 10...

Cheers

Spogg

Hi Spogg,
Here are the screenshots of "CPUID", which will give you the lowdown.
I'm running Win. 7 Home edition, fully updated.
Yeah, the box is 8 years old, but it loaded 3.0.9 no problem.
It didn't run worth a darn, as you know.
I tried to add 6 screenshots, wouldn't accept more than 3, so I zipped 'em up, here they are.

ROXY

Posted: **Sun Jan 07, 2018 6:14 pm**

Thanks Roxy.

I personally have no more ideas about this.

If no-one else here can help I would suggest emailing DSPR support with your screenshots and details.

Sorry!

Spogg

Posted: **Sun Jan 07, 2018 7:50 pm**

Spogg wrote:Thanks Roxy.

I personally have no more ideas about this.

If no-one else here can help I would suggest emailing DSPR support with your screenshots and details.

Sorry!

Spogg

Hi Spogg,
I'm getting along fine with 3.0.7, no worries.
I'll stick with it for now.

ROXY

Posted: **Sun Jan 07, 2018 8:02 pm**

Ah damn, ok I figured out why it didnt work. I just noticed that you have to enable the reverb by clicking the blue name in the corner "FDN Reverb". It wasnt apparent :lol:

Posted: **Sun Jan 07, 2018 8:47 pm**

adamszabo wrote:[...] does it consist of early and late reflections? Or its just one series of delays?

As a result of the feedback matrix design, isolated early reflections are followed by a buidup of rapidly increasing echo density to finally end up in a continuous reverbration tail. So both early and late reflections are included, however without separate controls.

Posted: **Sun Jan 07, 2018 8:54 pm**

adamszabo wrote:Ah damn, ok I figured out why it didnt work. I just noticed that you have to enable the reverb by clicking the blue name in the corner "FDN Reverb". It wasnt apparent

Hi Adam,
Day---yum !
The reverb works fine now !
Thanks for the heads up !

ROXY

Posted: **Sun Jan 07, 2018 8:57 pm**

martinvicanek wrote:
adamszabo wrote:[...] does it consist of early and late reflections? Or its just one series of delays?

As a result of the feedback matrix design, isolated early reflections are followed by a buidup of rapidly increasing echo density to finally end up in a continuous reverbration tail. So both early and late reflections are included, however without separate controls.

Hi Martin,
Looks like Adam figured it out, your reverb sounds GREAT !
I haven't dealt with 'mats' since the mid 1980s,learning BASIC.
Now I gotta hit the books again and see what's what !
Again, GREAT sound !

ROXY

Posted: **Thu Nov 16, 2023 1:09 pm**

Hi Folks !

Today I was working on this reverb.
Something surprises me a lot !

In the leaky integrator I can observe that the contribution of

Code: Select all: a

and

Code: Select all: q

interact in the pole placement of the damping filter.

: Leaky integrator magnitude; image.png (27.66 KiB) Viewed 4936 times

For me this linking is counter intuitive.
I mean, a leakage close to one is for short delay lines, they will be processed more frequently than long delay lines that have a lower leakage value (closer to 0).

but when leakage is closer to zero, cutoff frequency moves higher !

I tried to propose a basic modification to your schematic martin to demonstrate the difference in sound of another damping where cutoff is independant of leakage.

The push button on the interface enables this alternative filtering technique.

Please tell me what you prefer !

FDN Reverb FR version.fsm: (259.18 KiB) Downloaded 209 times

Posted: **Sat Nov 18, 2023 5:53 pm**

Thanks for looking into this, francoisreme. You might be right, frankly I didn't spend much thought on the exact inner working of the reverb decay time T60 (it should really read RT60) and the (trebble) damping. My workflow is to set the reverb time to the desired value and then adjust the damping, not the other way round. Hence it does not matter (for me) if the corner frequency depends on the reverb time, as long as the range of the damping knob covers my preferred values. But of course other people may have a different aproach where it does matter. Your choice!

BTW that FDN reverb was before I discovered a better way which resulted in MVerb 7B.

DSP Robotics Support

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