Hi,
I'm working at a studio at the moment were there's a present 10khz (actually is somewhere between 9.5Khz and 10Khz) in the Audio signals.
That noise is more present in Keyboards, Guitar and bass amplifiers and any signal I connect to a DI.
It's also present at mic signals although lower in level.
In some keyboards I was able to completely clean the signal by isolating the ground at the power plug (ground lift on the DI didnt stop the noise).
For the sake of testing I also isolated the ground at the power plug on guitar amps although with no improvements at all.
The Studio is at an industrial location, and was made at a warehouse over the years, it was a properly planned and implemented project so the electrical installations is of a warehouse and not a professional studio.
The Console and all the outboard are powered through Furman PL-8 C E Power Conditioner's, that are speced with having "Noise Filtration - LiFT offers AC power filtering to ensure clean power for unequaled audio & video clarity" and "Isolated Banks - Isolated outlet banks minimize inter-component interference and noise contamination".
Backline like the guitar and bass amps are powered in the live room and connected to the normal wall power plugs.
The 10KHZ noise seems to be worse in some days than the others, although the frequency is constant.
I would like to minimize this problem as much as possible, knowing that the studio is not mine, so I can't do a new and well planned electrical installation.
What might me the cause of this problem?
What could I do to test and find the culprit/culprits?
Any tests you could advise?
What could I do to minimize it?
Thank you so much
I'm working at a studio at the moment were there's a present 10khz (actually is somewhere between 9.5Khz and 10Khz) in the Audio signals.
That noise is more present in Keyboards, Guitar and bass amplifiers and any signal I connect to a DI.
It's also present at mic signals although lower in level.
In some keyboards I was able to completely clean the signal by isolating the ground at the power plug (ground lift on the DI didnt stop the noise).
For the sake of testing I also isolated the ground at the power plug on guitar amps although with no improvements at all.
The Studio is at an industrial location, and was made at a warehouse over the years, it was a properly planned and implemented project so the electrical installations is of a warehouse and not a professional studio.
The Console and all the outboard are powered through Furman PL-8 C E Power Conditioner's, that are speced with having "Noise Filtration - LiFT offers AC power filtering to ensure clean power for unequaled audio & video clarity" and "Isolated Banks - Isolated outlet banks minimize inter-component interference and noise contamination".
Backline like the guitar and bass amps are powered in the live room and connected to the normal wall power plugs.
The 10KHZ noise seems to be worse in some days than the others, although the frequency is constant.
I would like to minimize this problem as much as possible, knowing that the studio is not mine, so I can't do a new and well planned electrical installation.
What might me the cause of this problem?
What could I do to test and find the culprit/culprits?
Any tests you could advise?
What could I do to minimize it?
Thank you so much