MTPAV AC HUM ISSUE HELP!

Timeline · Post by **Timeline** » Sun Apr 23, 2006 8:22 am

I have a major ground hum when I powerup the MTPAV now. Just happens in all my unbalanced audio sources and M-Audio speakers.

It appears to NOT be a ground loop and rather something in the PSU that is emenating all over my system via ac.

The MTPAV seems to still work, strangly enough.

Anyone else heard of this?

Sticky Fox · Post by **Sticky Fox** » Sun Apr 23, 2006 6:47 pm

It could be a ground loop if you're using USB. I'm not sure how you'd address it. Perhaps you can lift the ground on the MTPAV?

If it's a 60Hz noise you're hearing, it's not getting into your monitors through the AC.

Timeline · Post by **Timeline** » Sun Apr 23, 2006 8:31 pm

Sticky Fox wrote:It could be a ground loop if you're using USB. I'm not sure how you'd address it. Perhaps you can lift the ground on the MTPAV?

If it's a 60Hz noise you're hearing, it's not getting into your monitors through the AC.

Yea thanks. tried the lift and no dice. It's usb. I'll mess with it at the end of the week.

Cheers

Sticky Fox · Post by **Sticky Fox** » Tue Apr 25, 2006 2:55 am

Timeline wrote: Yea thanks. tried the lift and no dice. It's usb. I'll mess with it at the end of the week.

Drat.. That's a really weird place for a hum to be coming from. Are you using MIDI only, or do you have the timecode/word sync or anything else connected?

Timeline · Post by **Timeline** » Tue Apr 25, 2006 3:52 am

It seems to eminate out the ac line as noise. using Mackie control, a few synths too but no big setups like TC lockup or anything