Restoring DBX noise reduction?

Discussion in 'Working with Sound' started by DimChandeliers, Jul 24, 2022.

  1. DimChandeliers

    DimChandeliers Ultrasonic

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    Here I go again.

    I'm converting some multitrack cassette tracks to digital. The tracks were recorded on a Tascam Porta One with the DBX NR enabled. However, my Porta One is broken, so the tracks are being played back on a Tascam Porta 02 which does not have DBX NR. Therefore, the sound quality is compromised. There's a lot of hiss and it sounds like there's too much compression.

    Is there any plugin effect that might restore some of the sound quality that was lost in this process?

    Thanks in advance.
     
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  3. Ryck

    Ryck Guest

    recover something that was lost? I don't think so. But when it comes to sound repair, for me, izotope is the best Ozone or RX ,
    For the hiss, I would try Fabfilter eq 3 and treat the specific frequency.
     
  4. dkny

    dkny Platinum Record

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    u-he's Satin can do dbx encoding and decoding...

    But you might be better, as stated above, doing some de-noising instead. Modern tools are really good at this.
     
  5. clone

    clone Audiosexual

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    You are not trying to recover something lost in this situation. DBX Noise Reduction not being applied means the opposite. That's why it now has "hiss". It was already there and had been attenuated by the NR. The "over compression" comes from drastically changing the Signal to Noise Ratio.
     
    Last edited: Jul 24, 2022
  6. fiction

    fiction Audiosexual

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    Satin can decode dbx?
    Good to know, thanx!
     
  7. DimChandeliers

    DimChandeliers Ultrasonic

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    Thanks for the quick responses. That's good to know about the u-he Satin.
     
  8. recycle

    recycle Guest

    If I remember correctly there were external DBX units that served exactly this purpose. Looking on Ebay, the cheapest I found is the DBX II 122

    [​IMG]
    [​IMG]


    You have to hope that the decoding is compatible with your recording (noise reduction tech specs have varied over time).
    The good news is that the price of it is not high ($ 65): you can risk and buy it, maybe it works

    An alternative "homemade" method is this:

    Decoding DBX Noise Reduction using standard plugins
    http://www.bobweitz.com/dbx_webpage/dbx.html
    Basically, an equalizer and an expander are applied to the recording. I wouldn't exactly call it a correct procedure to solve the problem, but you can try to hear what comes out (it costs nothing)
     
  9. softice

    softice Producer

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    u8yt
     
    Last edited: Aug 12, 2022
  10. DimChandeliers

    DimChandeliers Ultrasonic

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    All excellent replies. Thank you. I'll get to work.
     
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