Famicom World

Family Computer => Technical & Repair Assistance => Topic started by: fredJ on February 22, 2017, 08:30:19 am

Title: Famicom sound weird drum effect
Post by: fredJ on February 22, 2017, 08:30:19 am
I have an AV modded famicom that adds extra beats here and there

It seems playable but it gets annoying quickly.

Any idea what it could be? I tried replacing caps C2 and C7 I think, and it sounds exactly the same.

In this video you can here at at :02 and :04
https://www.youtube.com/watch?v=fqfiOV-KtGU

Also the sound is a bit buzzing and hissing.

Post Merge: February 23, 2017, 03:50:17 am

I think it is something with the CPU that is defect, my colleague believed it.

So I won't bother trying to fix it.
Title: Re: Famicom sound weird drum effect
Post by: P on February 23, 2017, 07:06:42 am
Where is the extra beat in more detail? I hardly hear the beats at all.

What revision of the CPU is it?
Title: Re: Famicom sound weird drum effect
Post by: fredJ on February 27, 2017, 09:20:30 am
Here also, around 0:25
https://www.youtube.com/watch?v=6Y5rjRsW5Ek

It is the older model, don't know exactly, quite annoying problem, too bad I didn't notice before we modded it.
Title: Re: Famicom sound weird drum effect
Post by: P on February 28, 2017, 03:04:19 am
I guess it's more audible in person than in a recording. I do hear some strange sounds but I can't tell if they are part of the background noise or the game sound.
At 0:25 Mario is catching a power up so the sound effect is taking over the sound channels, so it's hard to hear anything strange at that moment.
Title: Re: Famicom sound weird drum effect
Post by: Skawo on February 14, 2023, 03:56:33 am
I just noticed I have this same issue.
https://www.youtube.com/watch?v=AVkuT6t_FXY

Aw man. I don't suppose you ever figured out how to fix it?
Title: Re: Famicom sound weird drum effect
Post by: fredJ on February 16, 2023, 06:49:49 am
It was a long time ago...
I haven't had the problem since with any console. And I think I just sold it "as is", and I haven't heard about it since...