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Lodovico29525550kn73
New Participant
April 22, 2023
Question

Audio interface records audio in 32 bit float but it clips in Audition

  • April 22, 2023
  • 2 replies
  • 1518 views

Hi,

 

I recently purchased the ZOOM UAC-232 that can record files up to 32 bit float, which means that the audio cannot clip, even when it goes beyond 0dB. This function works as intended in Pro Tools and Reaper projects, but it doesn't in Audition (which is my main DAW for work). In Audition, I create a new file or a new multitrack session in 32 bit float and I record with the ZOOM UAC-232 clipping the audio, but when I normalize it the clipping remains. The audio driver is the ZOOM UAC-232 Asio driver, which is the same I used in my tests in Pro Tools and Reaper, and I use Audition 23.3 and Windows. My questions are:

 

1) Why the audio clips if I record 32 bit float audio in a 32 bit float file?

2) Is there something I can do/ Is it a limitation of Audition at the moment?

3) If it is a limitation, would it be feasible for Adobe to make Audition support "real" 32 bit float recording? Or try it in the Beta?

 

Thank you for your kind attention

    2 replies

    C
    Christopher5FD1
    New Participant
    October 7, 2024

    Has there been any movement on this to simply things. I am able to record and export 32 bit float using said device. Finding information on the workflow has been difficult. Anyone got any on-line links? Thanks very much

     

      C
      Christopher5FD1
      New Participant
      October 7, 2024

      I am using Microsoft Windows laptop

        D
        DMcClintock
        New Participant
        June 1, 2023

        All 32-bit means is you have a much greater dynamic range than the 16db or 24db ranges. Both bitrates cannot go past 0db, or you will get clipping.  32-bit is excellent for creating masters but can't be played back on consumer players. I have the Zoom UAC-232 as well, and it does a phenomenal job, but there is an additional step you need to take in post-production. In my workflow, I now use the original recording and then make a copy of that file to use as an edit master. I open the copied file in the Editor, highlight the area higher than the 0db marker and lower the gain. You will find the integrity of the recording intact, and then you'll be able to normalize it.

        SteveG_AudioMasters_
        SteveG_AudioMasters_
        Community Expert
        June 11, 2023

        Just to clarify this (and I'm sure that the devs will tell me if it isn't correct): There's a significant difference between opening a 32-bit FP file - which is what DMcClintock is talking about - and being able to record one using the UAC-232 as the input device. Opening the file made on the UAC-232 should work correctly - it's a 32-bit FP file and Audition can handle these. The problem arises when you start a new 32-bit file in Audition. What happens then - and this has not been an issue up to now - is that you create a 32-bit 'container' which comprises three parts; a 23-bit mantissa, a sign bit, and an 8-bit exponent. No audio device until now has actually outputted the exponent part, so it's remained empty; full of zeros and you couldn't input data to it. I think (and this is where the devs might like to clarify) that all that needs to happen is that exponent recording needs enabling. Presently, the mantissa and sign bit record correctly but the exponent is ignored.

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