My Dad's Funeral Service

Audacity Help Forum Windows
1

Windows 10.
Audacity 2.1.1
exe.installer [I think!]
Hi
I don’t know if this is retrievable or not. Attached is a short clip from my Dad’s Funeral Service. Someone set the machinery up incorrectly and although his Service was recorded, the singing & speech is drowned out by a buzzing sound.

http://picosong.com/AL9e/

I’m not technical enough to fiddle with the sound, but am hoping it can be filtered in some way to take the “buzzing” out?
Thanks all. Paul

2

Someone wrote a hum filter that might be able to help…a little. That’s a microphone with a broken shield.

I need to look.

Koz

3

I can get “a bit” of improvement using a custom Nyquist script in the Nyquist Prompt effect (http://manual.audacityteam.org/o/man/nyquist_prompt.html). The recording is pretty bad, so the results are not going to be good.
This is what I can get, but the later part of your extract comes out worse:

Unfortunately, once the amount of hum is reduced, it becomes obvious that there is also a lot of other damage to the sound. Perhaps the mic was not plugged in properly, or the mic cable is damaged.

This is the Nyquist script:

(setf hum-base-hz 49.91)

(defun dehum (sig dur)
    (mult
      (abs-env (pwlv 0 0.07 1 0.1 10 dur 10))
      (dotimes (i 32 sig)
        (setf sig
          (notch2 sig
                  (* (1+ i) hum-base-hz)
                  (* (1+ i) 6))))))

(setf dur (get-duration 1))
(highpass2
  (eq-highshelf
    (eq-lowshelf 
      (multichan-expand #'dehum *track* dur)
      800 12 0.5)
    3500 -12 1)
  150)

This effect will run quite slowly and I’ve not tested it on long tracks (works OK on a 15 minute track - eventually).
Ensure that you have a backup copy of the original before you do anything.

4

I got ratty results with multiple notches and Noise Reduction (attached).
Koz