If you try a DVD is it the same please?
And it does this with more than one tape?
As well as the hum does the sound appear to be low too?
The sound itself is it low below the hum or is the sound good and loud you just have the hum?
So sound lowish below the hum or very good sound but an annoying hum
OK the audio head is contaminated please get this> video head cleaning tape <<<CLICK
Its likely the audio head is contaminated so the sound is appearing bad like this.
Let me know if you need more help
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Yes that is no problem
How is this working out please?