NAM: Neural Amp Modeler

[Dom Mcsweeney]

So, the 'calibration' when using the NAM plugin is an automatic adjustment of the input gain based on what you write in that box (in your case, 4dbu) and what is written in the metadata of the NAM model itself. If it's not written in the metadata of a specific model you are using, then you can dial it in manually yourself on the input gain control of the plugin.

Here's a blog article that explains it in full detail: https://neural-amp-modeler.readthedocs.io/en/latest/tutorials/calibration.html

 

[2dor]

here it is written

Soldano SLO 100 LTD [Hyper Accuracy+] NAM Profiles by @slamminmofo · TONE3000

Check out slamminmofo's neural amp head capture for guitar, bass and recording: !!! IMPORTANT: CAPTURES ARE CALIBRATED FOR +18.1 dBu !!! !!! USE THE NAM PLAYER AUTOMATIC CALIBRATION FOR CORRECT GAIN !!! !!! COMPLEX CAPTURES ARE STILL IN TRAINING, ONLY STD/XREV CAPTURES ARE AVAILABLE FOR NOW...

www.tone3000.com

!!! IMPORTANT: CAPTURES ARE CALIBRATED FOR +18.1 dBu !!!
what am i gonna do
am i still use 4 dBu for calibrating ?

You just type in 4 dBu and the plugin automatically adjusts using the 18.1 dBu and the value you supplied it (4 dBu).

Once you type your dBu value in and scroll through calibrated profiles, you don't need to do anything - the NAM plugin auto-adjusts to give you a seamless experience.

 

[volkan]

You just type in 4 dBu and the plugin automatically adjusts using the 18.1 dBu and the value you supplied it (4 dBu).

Once you type your dBu value in and scroll through calibrated profiles, you don't need to do anything - the NAM plugin auto-adjusts to give you a seamless experience.

So what should i do for the neural dsp plugins.
input gain at zero on interface and then input gain on the plugin which value should be adjusted to?

 

[AlbertA]

So what should i do for the neural dsp plugins.
input gain at zero on interface and then input gain on the plugin which value should be adjusted to?

Amp Simulation Input Gain

Designing and building hardware and software for musicians and audio professionals

ghostnoteaudio.uk

 

[2dor]

So what should i do for the neural dsp plugins.
input gain at zero on interface and then input gain on the plugin which value should be adjusted to?

@AlbertA pointed you to a good resource.
@MirrorProfiles put this together predating the Ghost Note Audio reference:



To your point, for Neural DSP plugins, turn the Input slider on the plugins down by about -8.2 db.

 

[volkan]

@AlbertA pointed you to a good resource.
@MirrorProfiles put this together predating the Ghost Note Audio reference:



To your point, for Neural DSP plugins, turn the Input slider on the plugins down by about -8.2 db.

thanks man for answers you are great
i have got 4 db on interface when its at 0 gain
neural dsp is written 12.2 db
i dont understand why i am lowering plugin input level -8.2 db.
if i want 12.2
shouldn't be increase to achieve 12,2 ???

 

[volkan]

What is going on
i had never used gain knob at 0
Do you guys using gain knob at 0

Audient doesnt suggested 0 gain for the input

i asked for that and Audient help desk answered :


Hello,

The Sono mic pre max input is +16dBu, the DI input (for guitar pickups) is +4dBu.

We recommend setting gain on the input so that you are not clipping the input, and then using the amp sim trim if you want to push the amp sim harder or lower the input level there as required.
Kind regards,

Charles Taylor
Technical Support Agent
Audient Ltd.

 

[2dor]

thanks man for answers you are great
i have got 4 db on interface when its at 0 gain
neural dsp is written 12.2 db
i dont understand why i am lowering plugin input level -8.2 db.
if i want 12.2
shouldn't be increase to achieve 12,2 ???

Your interface hits 0 dBFS (so clipping, hitting the maximum signal celiling) in the digital domain if you hit it with 4 dBu which is equivalent to 1.227 Volts RMS.

The Neural DSP plugins were calibrated on a signal chain which hits 0 dBFS in the digital domain if you hit it with 12.2 dBu which is equivalent to 3.156 Volts RMS.

A 4 dBU interface saturates / clips at a much lower voltage.

In the digital domain, your 4 dBu would look "hotter" than a 12.2 dBu interface provided both are set with the gain knob at 0 and you run the same signal (amplitude / voltage) into them.

LE: to put things into perspective, if you strum hard on a Seymour Duncan JB pickup guitar, your 4 dBu input will hit the RED / clip for sure but on a 12.2 dBu interface, it would probably be safe below clipping (below 0 dBFS in the DAW).

So, in conclusion, you'd need to make up your "hotness" (lol) in the digital domain by subtracting the delta (12.2 - 4 = 8.2).

 

[Wasbeer]

Hard to believe the +4dBu max. input on the instrument input is correct on this piece of equipment.

 

[volkan]

Your interface hits 0 dBFS (so clipping, hitting the maximum signal celiling) in the digital domain if you hit it with 4 dBu which is equivalent to 1.227 Volts RMS.

The Neural DSP plugins were calibrated on a signal chain which hits 0 dBFS in the digital domain if you hit it with 12.2 dBu which is equivalent to 3.156 Volts RMS.

So, a 4 dBU interface saturates at a much lower voltage. In the digital domain, your 4 dBu would look "hotter" than a 12.2 dBu interface provided both are set with the gain knob at 0 and you run the same signal (amplitude / voltage) into them.

In conclusion, you'd need to make up your "hotness" (lol) in the digital domain by subtracting the delta (12.2 - 4 = 8.2).

man this is science for me i dont have enough skills to catch that
at the end i am convinced that i will lower the signal 8,2 dB :)

 

[volkan]

Hard to believe the +4dBu max. input on the instrument input is correct on this piece of equipment.

sir
this is something different from the other interfaces
audient sono is like tube preamp
there is one tube inside and two gain stages
i hope @2dor explain better about that

 

[2dor]

man this is science for me i dont have enough skills to catch that
at the end i am convinced that i will lower the signal 8,2 dB :)

It's easier than it seems.

At first it's a bit of a mind bender but if you read a bit into it, this stuff starts to make sense.

It's really about how different inputs react to the same voltage; some will represent a 1 Volt peak-to-peak signal louder in your DAW, while on others the same voltage will seem minuscule.

 

[Wasbeer]

sir
this is something different from the other interfaces
audient sono is like tube preamp
there is one tube inside and two gain stages
i hope @2dor explain better about that

That would mean the interface will be clipping quite easily when just strumming, when gainknob is turned down. Increasing the input gain on the interface like they advise will make it even worse. Trim the signal later on in the amp sim doesn't fix this.

 

[2dor]

That would mean the interface will be clipping quite easily when just strumming, when gainknob is turned down. Increasing the input gain on the interface like they advise will make it even worse. Trim the signal later on in the amp sim doesn't fix this.

Yeah - it won't do anything for the AD converters clipping but yeah.. if he's playing a strat with low output pickups it might be ok.

 

[volkan]

Yeah - it won't do anything for the AD converters clipping but yeah.. if he's playing a strat with low output pickups it might be ok.

i am even playing with active pickups and doesnt clipping any how this is possible

 

[Wasbeer]

The specs say:

- maximum input level (at unity gain): +4dBu

Maybe the "at unity gain" part differs from the usual "at minimum gain" which is usually specified in specsheets?

 

[2dor]

The specs say:

- maximum input level (at unity gain): +4dBu

Maybe the "at unity gain" part differs from the usual "at minimum gain" which is usually specified in specsheets?

Nah - it's the same across the board but this interface has tubes in it so I guess it hits a tube or something first then goes to the A/D. It's very likely adding its own coloration to the signal.

You'd 100% clip a 4 dBu interface with active pickups (at least with active humbuckers).

But I regress: all that's been outlined earlier holds up across most interfaces. @MirrorProfiles has pioneered raising awareness on this topic in the past 2-3 years & has done multiple vis on it etc.

 

[volkan]

Nah - it's the same across the board but this interface has tubes in it so I guess it hits a tube or something first then goes to the A/D. It's very likely adding its own coloration to the signal.

You'd 100% clip a 4 dBu interface with active pickups (at least with active humbuckers).

But I regress: all that's been outlined earlier holds up across most interfaces. @MirrorProfiles has pioneered raising awareness on this topic in the past 2-3 years & has done multiple vis on it etc.

it doesnt clipping even with emg humbuckers
There are two gain stages
first one before tube with input knob and then after goes to eq and then second stage to output
there are two knobs input and output
you will adjust them together for the gain staging
there is also indicator lever for clipping
ouput knob works like input knob on the other interfaces
below image you can see this is your di signal

maybe we should consider here ??

Hi there,

Yes, primarily the input knob on the Sono, although in this case both input and output knobs are before ADC so they are used together to set your overall pre-ADC gain level.

Kind regards,

Charles Taylor
Technical Support Agent
Audient Ltd.

 

[Dom Mcsweeney]

Perhaps @Ross Davies could be of some help in clarifying specs and what calibration should be set to?

 

[volkan]

Perhaps @Ross Davies could be of some help in clarifying specs and what calibration should be set to?

yes please @Ross Davies