1 (edited by yiannis 2024-09-05 08:58:57)

Topic: Fx distortion

Today I was exploring the Fx section in Total mix using my new UFX ii.
In low reverb levels   I hear distortion.Also its very clear when turning of the fader and have only the reverb present.

The same happens with a Ucx ii I have for testing

Re: Fx distortion

Please try the new driver 4.16
Totalmix 1.97b1

M1-Sequoia, Madiface Pro, Digiface USB, Babyface silver and blue

Re: Fx distortion

Still on Mojave so its not possible.....

Re: Fx distortion

Which driver exactly did you install?

Regards
Daniel Fuchs
RME

Re: Fx distortion

https://i.ibb.co/f2tYGf1/Screenshot-2024-09-06-at-14-48-23.png
https://i.ibb.co/4tykTjQ/Screenshot-2024-09-06-at-14-48-35.png

Re: Fx distortion

The only thing you can update is Totalmix, you can download it directly and replace the old one in the Application folder by drag and drop.
https://www.rme-audio.de/downloads/tmfx_mac_197b1.zip

But I think it will not help you out with the distorted reverb, there is a chance the internal DSP is broken and the unit needs repair.

Try the new Totalmix, who knows...

M1-Sequoia, Madiface Pro, Digiface USB, Babyface silver and blue

7 (edited by yiannis 2024-09-06 13:21:33)

Re: Fx distortion

waedi wrote:

But I think it will not help you out with the distorted reverb, there is a chance the internal DSP is broken and the unit needs repair.


Geez its a brand new unit....after all UCX ii behaves the same

Re: Fx distortion

Did you try a total reset in Totalmix ?
The Echo effect has no distortion ?

M1-Sequoia, Madiface Pro, Digiface USB, Babyface silver and blue

Re: Fx distortion

just tried to reset total mix without room eq.....nothing has changed and delay is totally clean

Re: Fx distortion

Is it possible to provide a MP3 with this distorted reverb ?
If you record a sequence Loopback from Totalmix ?
Or can you describe it more ?
Is it only a little distortion in the upper frequencies of the reverb tail or is it crackling all the way thru ?

M1-Sequoia, Madiface Pro, Digiface USB, Babyface silver and blue

Re: Fx distortion

I am trying to record it without  repatching but I can't...is there a quick way to describe how to do it using loopback?

12 (edited by waedi 2024-09-06 14:24:46)

Re: Fx distortion

One of the hardware outputs has the signal with reverb. You rout it there.
Open the channel with the wrench tool.
Click the Loopback button.
In the DAW record the input channel.
Output channel 1/2 provides the Loopback signal to input channel 1/2 in the DAW.
And so on, always on the corresponding same number from output to input channel in the DAW.

M1-Sequoia, Madiface Pro, Digiface USB, Babyface silver and blue

13 (edited by yiannis 2024-09-06 14:32:39)

Re: Fx distortion

Thank you!!
As you ll hear when there is only reverb present, distortion is more obvious when I lower the reverb level.

http://sndup.net/ckjh7

Re: Fx distortion

Can't play the file the upload failed, please try again

M1-Sequoia, Madiface Pro, Digiface USB, Babyface silver and blue

Re: Fx distortion

It plays just fine here but please try this one

https://audio.com/venom-4/audio/test

Re: Fx distortion

Space is the only reverb algorithm that doesn't distort

Re: Fx distortion

Now they play fine, the first one was probably a fail of the webpage.
I did listen with the headphones and I'm very Sorry I can't hear a distortion.
The reverb comes up and the dry signal gets back leaving a lot reverb upfront but it sounds fine to me.

M1-Sequoia, Madiface Pro, Digiface USB, Babyface silver and blue

Re: Fx distortion

Thats pretty weird I do hear a lot of distortion......

19

Re: Fx distortion

This is normal. At very low levels the resolution of the FX rendering is no longer high enough and leaves some grunge or crumble effect on fade out. But this is only audible when levels are set totally wrong (much too low on the input side), which you perfectly demonstrated in that wav. The harsh distortion on the clean 'she' and s sounds are much more worrying...

Regards
Matthias Carstens
RME

20 (edited by yiannis 2024-09-06 15:04:45)

Re: Fx distortion

MC wrote:

The harsh distortion on the clean 'she' and s sounds are much more worrying...

That could be the recording.....but you do hear distortion right???

Its strange that the space algo doesn't distort

21

Re: Fx distortion

No, that is by design. And you simply use it wrong: give the FX input high level, then adjust the amount of needed reverb at the output (!), either in the FX section or the Aux return in the output channels. Then you will no longer hear this effect.

Regards
Matthias Carstens
RME

Re: Fx distortion

Like this?

https://i.ibb.co/xG6N1Yv/Screenshot-2024-09-06-at-17-10-14.png

23

Re: Fx distortion

The FX has its own level meters where you can check if the input level is ok, too low, or too high. But yes, typically FX Send is set much higher than FX Return.

Regards
Matthias Carstens
RME

Re: Fx distortion

MC wrote:

The FX has its own level meters where you can check if the input level is ok, too low, or too high. But yes, typically FX Send is set much higher than FX Return.

Is there an explanation why echo is clean without distortion?

Re: Fx distortion

Probably because reverb is way, way more complex effect comparing to echo.

26

Re: Fx distortion

Obviously.

Regards
Matthias Carstens
RME

Re: Fx distortion

Kubrak wrote:

Probably because reverb is way, way more complex effect comparing to echo.

What about space reverb algorithm...that doesn't distort  at  all....

Re: Fx distortion

Again just guessing.... Maybe it uses just many delays and other reverbs use different approach - convolution - which requires a  lot of computing.

I guess, the main thing is that you know how to set signal path in TM so that reverb sounds fine, now.

Re: Fx distortion

Yes I do know .. it's just for testing purposes.In the analog world never had issues when using low level sent signal.   ....but in this case signal level is critical

Re: Fx distortion

You do not have analog reverb in analog, put aside physical spring/plate devices.....

Even in analog world one prefers processing strong signal to processing weak signal to have better signal to noise ratio. Using very weak signal in digital is something like using  in reality, for example, 8 bits quantization instead  of 32 bits as most of those 32 bits are for weak signal "zerros". Resulting calculations then are what they are. Garbage in, garbage out.

Re: Fx distortion

Kubrak wrote:

You do not have analog reverb in analog, put aside physical spring/plate devices......

I was trying to say that in analog world, reverbs that you are patching on a analog mixer even if they are digital like  Lexicon devices you don't have those problems  but the explanation you wrote explains the distortion in TM

Re: Fx distortion

OK, but question is if those Lexicon chips get weak or strong signal in mixer. And also they may internally work with higher precision, or they are based on multiple delays (which works in TM fine even for weak signals) and not FFT....

It seems to me that you sent by error/misunderstanding atenuated signal to FX (reverb) and than amlified it too much afterwards. Instead of sending strong signal to FX and atenuating it later, if needed...