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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: XDelusion on October 07, 2012, 04:42:46 AM

Title: Computer making strange sounds.
Post by: XDelusion on October 07, 2012, 04:42:46 AM
So I decided to re-arrange my audio gear, Amiga included. After setting everything up and hooking the Amiga into the mixer board, I noticed that when ever it is on, there is a constant bassy thud that goes on twice a second. Also when ever I load something off the hard drive there is sounds in the speakers like the hard drive is being read from. This really really sucks!

How do I make it stop, it was not doing this before.
Title: Re: Computer making strange sounds.
Post by: danbeaver on October 07, 2012, 06:46:54 AM
Isolate the audio circuit. You have to do the same thing with high-powered car stereo equipment (unless its a diesel).  All that computer stuff makes radio waves (let's not even talk about stuff in the FM spectrum ~ 100MHz).

I've not looked into that stuff in 20 years, but I found a lot in audio magazines at the time; probably all over the web now
Title: Re: Computer making strange sounds.
Post by: XDelusion on October 07, 2012, 06:58:38 AM
What do you mean by isolate? Separate it from the others?

Anyhow, I unplugged everything and plugged it back in. Noise gone. Phew! :)
Title: Re: Computer making strange sounds.
Post by: platon42 on October 09, 2012, 03:26:49 PM
Quote from: XDelusion;710628
So I decided to re-arrange my audio gear, Amiga included. After setting everything up and hooking the Amiga into the mixer board, I noticed that when ever it is on, there is a constant bassy thud that goes on twice a second. Also when ever I load something off the hard drive there is sounds in the speakers like the hard drive is being read from. This really really sucks!

How do I make it stop, it was not doing this before.


I had a TFT display once that had a "bad" switched-mode power supply that would cause that kind of sound, even if the TFT was not on. Some bursts of discharged spread into my audio cables and amplifier and that was quite annoying. Try to find out if this is the case for you by unplugging all your power adapters except for the AMP one by one.
Title: Re: Computer making strange sounds.
Post by: Lurch on October 09, 2012, 06:56:04 PM
Quote from: XDelusion;710637
What do you mean by isolate? Separate it from the others?

Anyhow, I unplugged everything and plugged it back in. Noise gone. Phew! :)



Loose connection/something not quite plugged in 9 times out of 10. As life has taught me is to stop over teching things. Always get's me in a bigger hole :-)