Hey Fons,
How can I check if the keyboard/power supply is grounded? The power supply
itself is a three pronged one....
Thanks.
Andrew.
On Sun, Nov 29, 2009 at 3:55 PM, <fons@email-addr-hidden> wrote:
> On Sun, Nov 29, 2009 at 03:16:33PM +0000, Andrew C wrote:
>
> > I'm just wondering, is the start of this short recording a ground hum
> > loop? It appears to be a weird high pitched whine in there as well...
>
> 325.3 Hz and harmonics, either from digital circuits in your
> keyboard, or from a switching power supply.
>
> Is the keyboard itself grounded ? If not try that first (if
> it has a ground pin...)
>
> > Could a DI box solve this problem?
>
> One that provides ground separation (i.e. with
> a transformer) probably will.
>
> Ciao,
>
> --
> FA
>
> Io lo dico sempre: l'Italia è troppo stretta e lunga.
>
>
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Received on Sun Nov 29 20:15:05 2009
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