I have a video from which I extracted audio to clean it using Audacity. I applied both High Pass Filter (50 Hz) and Low Pass Filter (1000 Hz) and then used Noise Gate to remove unwarranted noise.
Now, when I merge the audio back with the video, it plays fine in the Editor (I have tried several paid and free programs), but after rendering, the audio quality becomes very poor with constant random noise in background.
What may be the cause of it? Any idea?
Edit - I found out that the rest of the audio stays almost the same, but the voice's texture changes to be a lot noisy. I am sure I'm doing something wrong, but cannot point out what.