Hey
Computer Cooks welcome to Retro Recipes. So I'm here just with a really quick video, because I just read about a
noise fix mod that can stop the buzzing of the Commodore 64
Sid chip! What buzzing you say?
Can't hear it? How about now?
Can you hear it now (says loudly)?
The noise is coming from the audio input pin and because the sid doesn't really use audio input, unless you're trying to digitize
the
ghostbusters welcome voice
Then we can disable that and all we do is ground it between pins two and five
Four. Five. Of the eight pit din. Eight pin dit. Wait, the eight pin din plug
So I'm gonna try and do this in under five minutes
That means the race is on. Welcome to Retro Recipes. Let's get cooking!
I feel like Brendan Fraser
Okay, here she is again, back on my workbench. Just where I like her. Let's open her up
Okay, I haven't even unplugged anything. How's that for speed ? So
(laughs) now I realize I'm pulling everything, so I'm gonna unplug it
As my father used to say, if the jobs worth doing, it's worth doing properly
This is an 8 pin din plug. It's referred to as a horseshoe variety
because it doesn't go in a circle, it kind of goes in a u-shape. So as you can see from the schematic
that's our audio input pin
and that's our ground in number 2. That is pin 5 and that is pin 2.
So all we need to do is bridge those on the inside, and we have therefore grounded pin 5
and hopefully reduced the noise. So when you look at this on the inside you can see
that these are numbered here, so 7 & 8, and you can tell where they go to in the pins as well now
I've run into my first headache with this
So pin 5 is visible
and pin 2 -
It's all the way inside. I wanted to do this the lazy way without removing the mainboard. Wait a minute! (excited)
What did my dad tell me?
There we see pin 2
and pin 5
It should be as simple
as bridging those with a little wire
Now as part of this video, I did interview several wires and this was the one that won the job. Congratulations little wire!
I'm gonna trim that down a bit, so doesn't impede the others
I'm gonna just heat this up, add a little more solder on the top
There is our bridged connection
Let's go try it out. And it's still on 20? Now it is
Okay, and then on the noisy screen when the actual sid chip turns on, I have no keyboard (laughs) Keyboard?
Waiting for the XRGB-Mini to boot up
Yeah, okay, so this is without the pin and
now I'm going to switch immediately and cut to with the pin
Yeah
Alright, I think we can call this a minor success. A little humming, a little buzzing reminds us, "Hey, we were happy with that in 1983!"
Thank you so much for joining me on this five minute journey. As always please subscribe, support and share this video
Thank you also to my Patreons, for supporting this channel
It really means a lot to me. Till next time. I'll leave you with some nice sid music without any noise
Cheerio!