Hi All

I don't know how and when the video tape was digitized. My customer gave me
an 44.1/16 audio file to work with. And yes, it is music.

I had tried reducing the highs, but that doesn't help much. Even though the
spectrogram shows that the fade-outs reach down to 6 kHz, hearing can still
detect the fades even though I lowpassed at 8 kHz.

Anyway, I had a try with Izotope RX7. I zoomed into a fade-out in the 
Then used the Brush tool and adjusted it to the size that fits with the 
fade width.
I "painted" manually with the Brush tool a "V-shaped" area to the 
fade-out trying to
follow it's shapes. (Each fade-out is different to the others).

Then, using the Deconstruct Tool, I enhanced the Tonal content by about 
+4 dB and the
Noise content by about + 1,5 dB. Then, zoomed more in (because that's 
simpler than
making the brush tool smaller in size , did the same procedure again and 
changed a
bit the gains. Most fade-downs need 2-4 such rounds.

It showed up that there isn't much tonal content left in the fade-outs 
to get it more

However, trying to smooth out the noise so that it would be about the 
same as it
is on both sides of the fade-out makes it a bit better, as the noise 
fade-outs don't
distract the ear as much as earlier.

Doing this manually is pretty slow. It took me 1,5 hours to treat a 40 
seconds section
at the end of the recording, where the fading is at it's worst.

I am not familiar with Izotope Ozone, but possibly I should give it a 
try. However, right now it might be a bit slow for me to to learn how to 
use a new tool.