The Auto Level Control Slide Selector switch was accidendally bumped from Auto to Manual Recording Level Mode.
The manual level thumb dial was at 10. On playback the there is a high level of background sound which all but covers over the faint voices in the mp3 file. Speach barely intelligible about 25% of the time.
Is the a repair/restoration strategy that is known for such an issue that would leave voices intelligable and eleminate the rest of the interfering sounds.
I have used band pass filter leaing just 150 Hz-3,5kHZ, de-noise-declick, spectral sampling and removal with unacceptable results using 3 by consumer level editting package without success.
Any help on this one?