1 Topic by acwell (edited by acwell 2022-12-16 18:44:08)

  • Registered: 2022-12-15
  • Posts: 5

Topic: Babyface Pro IN3 Input Issue

Hardware ：Babyface Pro FS
Driver version 1.219
Firmware：201
System：Windows10、11、Mac OS13

Recently,I found some problems withe the input IN3 on my Babyface Pro FS.When input a sine wave scan Frequency（20Hz-20kHz）,IN3's frequency curve like work in very slow roll-off  FIR filter?High frequency drops very fast.

I conducted a replacement analysis of different output devices,OS,Plugs.I confirm the Bugs or Problems just on IN3 input.

I don't know if it's because of new Firmware?or Hardware Issues.

Thank you for help!

  • waedi
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  • From: Swiss Zürich
  • Registered: 2020-12-08
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Re: Babyface Pro IN3 Input Issue

May you provide comparison fotos Input 3 and Input 4 ?

M1-Sequoia, Madiface Pro, Digiface USB, Babyface silver and blue
  • Registered: 2022-12-15
  • Posts: 5

Re: Babyface Pro IN3 Input Issue

waedi wrote:

May you provide comparison fotos Input 3 and Input 4 ?

Yes I have photos, but no image host.May I email attachment?

  • Registered: 2022-12-15
  • Posts: 5

Re: Babyface Pro IN3 Input Issue

waedi wrote:

May you provide comparison fotos Input 3 and Input 4 ?

Try onedrive pic host

screen capture from Audition
https://1drv.ms/u/s!AkAUjPVRQfO_3UwrS8h … -?e=mpWv6a
and .wav file
https://1drv.ms/u/s!AkAUjPVRQfO_3U6OeBi … B?e=kISwd0

  • waedi
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  • From: Swiss Zürich
  • Registered: 2020-12-08
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Re: Babyface Pro IN3 Input Issue

You recorded a sine sweep and it looks acurate as it should.
Nothing to complain.
where is the issue ?

That is your wave looking :
https://ibb.co/KbgQRFB

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

6 Reply by MC

  • MC
  • MC
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  • Registered: 2007-04-06
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Re: Babyface Pro IN3 Input Issue

The issue is right in front of your eyes - the left channel looses amplitude (level) at higher frequencies, while the right channel stays on track.

I am still not sure what that means exactly, as this sweep is hard (or cumbersome) to analyze. Also I see a lot of aliasing, so I wonder what was done here exactly.

There are many free tools that let you analyze the frequency response and give a plot that makes it easy to see any issues. Better use those.

Regards
Matthias Carstens
RME

MC's Website

7 Reply by acwell (edited by acwell 2022-12-18 06:57:51)

  • Registered: 2022-12-15
  • Posts: 5

Re: Babyface Pro IN3 Input Issue

waedi wrote:

You recorded a sine sweep and it looks acurate as it should.
Nothing to complain.
where is the issue ?

That is your wave looking :
https://ibb.co/KbgQRFB

L=IN3
R=IN4
Two signal is same（or switch plug）but recorded is different.I think it's the new Firmware's bug.The new Firmware maybe let IN3's A/D work at the different FIR filter.

  • Registered: 2022-12-15
  • Posts: 5

Re: Babyface Pro IN3 Input Issue

MC wrote:

The issue is right in front of your eyes - the left channel looses amplitude (level) at higher frequencies, while the right channel stays on track.

I am still not sure what that means exactly, as this sweep is hard (or cumbersome) to analyze. Also I see a lot of aliasing, so I wonder what was done here exactly.

There are many free tools that let you analyze the frequency response and give a plot that makes it easy to see any issues. Better use those.

It's not software's problems.

9 Reply by MC

  • MC
  • MC
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Re: Babyface Pro IN3 Input Issue

I tried to analyze your sweep file. There is no filter in the ADC that would result in 3 dB loss at already 20 kHz when using 96 kHz sampe rate. The slowest filter would have 3 dB at 40 kHz then.

So did you swap the cables between 3 and 4 to verify that the error is not found on 4 then?

Regards
Matthias Carstens
RME

MC's Website