Search found 1681 matches

by exxos
Thu Apr 26, 2018 9:20 am
Forum: TWEAKS & FIXES
Topic: Hissing and whistling in the STe audio output
Replies: 41
Views: 1072

Re: Hissing and whistling in the STe audio output

I tried my machine with the DAC fix.. I think it does help, but sounds still there. Though oddly, when I unplug the mains lead, all that "PC noise" stops.. so probably a grounding issue causing those sounds. I tried looking on my scope at the noise, but only really see MHz range noise, so tracing th...
by exxos
Wed Apr 25, 2018 11:09 pm
Forum: ELECTRONICS
Topic: Memory Chip Test Rig
Replies: 2
Views: 33

Re: Memory Chip Test Rig

:dualthumbup: Geek points for you today!

Takes me like 10mins to get one chip into a socket, so a ZIF is a great idea!
by exxos
Wed Apr 25, 2018 10:45 pm
Forum: ROM UPGRADES
Topic: Fixing broken pins on a ROM chip
Replies: 3
Views: 36

Re: Fixing broken pins on a ROM chip

:bravo: :goodpost:

Happens to me loads!
by exxos
Wed Apr 25, 2018 9:43 pm
Forum: TWEAKS & FIXES
Topic: Hissing and whistling in the STe audio output
Replies: 41
Views: 1072

Re: Hissing and whistling in the STe audio output

Did a new sample.. PC only (STE turned off) pc.jpg STE Turn on. ste.jpg Samples.. exxos2.zip On the STE one, I do hear (and you can hear in the audio) when it starts doing memory test, you can hear the "dashes" on the screen as the come up.. I need to find me headphone adapter and try that again...
by exxos
Tue Apr 24, 2018 9:38 pm
Forum: TWEAKS & FIXES
Topic: Hissing and whistling in the STe audio output
Replies: 41
Views: 1072

Re: Hissing and whistling in the STe audio output

I have heard noise on my STE's, but I only used headphones direct. Pressing spacebar pretty much deafened me it was that loud. so any noise I should hear it easily. I did hear a tiny bit, more so on RAM access, but my dac fix solved it, but I could barely hear it to start with.
by exxos
Tue Apr 24, 2018 9:30 pm
Forum: TWEAKS & FIXES
Topic: Hissing and whistling in the STe audio output
Replies: 41
Views: 1072

Re: Hissing and whistling in the STe audio output

OK finally got it recorded..

This is pure PC noise... after 10 seconds I start graphics tests...


exxos.zip
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by exxos
Tue Apr 24, 2018 9:04 pm
Forum: TWEAKS & FIXES
Topic: Hissing and whistling in the STe audio output
Replies: 41
Views: 1072

Re: Hissing and whistling in the STe audio output

OK, I hooked up my STE to my PC.. I hear the sounds I think.. but this is PC noise... Can't seem to record it in audacity... but when I run graphics test, sound goes mental.. I always disable the line input jacks on my sound card because I always hear loads of noises... makes no odds if the STE is p...
by exxos
Tue Apr 24, 2018 8:43 pm
Forum: TWEAKS & FIXES
Topic: Hissing and whistling in the STe audio output
Replies: 41
Views: 1072

Re: Hissing and whistling in the STe audio output

Paulo P wrote:
Tue Apr 24, 2018 8:27 pm
I understand. So, if you would have time sometime, please record your machine(s) to find out if all machines are the same and the hissing appears there too.
I will try and do that later this week...
by exxos
Tue Apr 24, 2018 8:13 pm
Forum: TWEAKS & FIXES
Topic: Hissing and whistling in the STe audio output
Replies: 41
Views: 1072

Re: Hissing and whistling in the STe audio output

No, I didn't run memory test software yet... but I have this feeling that the more RAM access, the worse noise is in the audio out. No matter if it is a direct stereo output or monitor audio (pin 1). So, the question is why and if there is a possibility to defuse this noise and interferences. And w...
by exxos
Tue Apr 24, 2018 7:52 pm
Forum: TWEAKS & FIXES
Topic: Hissing and whistling in the STe audio output
Replies: 41
Views: 1072

Re: Hissing and whistling in the STe audio output

Have you run memory test software and checked the audio noise ? Can't remember if its been talked about before, though I think some noise is RAM access noise. So more RAM access, the worse the noise should get..