Has anyone looked into fixes for the distorted sound in some recent NES and Fami-clone systems? So far I have seen tutorials for Famulator and early Retro Duo. I've got a 2017 Retro-Bit RES that has the issue, but it seems that it's audio circuit has been simplified from the 2011 era Retro duo.
Here's the Famulator fix: https://m.imgur.com/w77u99G (https://m.imgur.com/w77u99G)
And the Retro Duo mod: https://www.google.com/amp/s/satoshimatrix.wordpress.com/2011/07/19/retro-duo-nes-audio-correction-tutorial/amp/ (https://www.google.com/amp/s/satoshimatrix.wordpress.com/2011/07/19/retro-duo-nes-audio-correction-tutorial/amp/)
And my RES circuit:
It's probably a bit different for each system. I will take a look at your photos this week and see if I can come up with any ideas. My schematic drawing is what the circuit for my Retrobit system has, and it also has audio problems.
I seem to have made significant headway on my system, and I'll post a schematic update tonight. I added one resistor and removed a ceramic capacitor. I will look at yours tonight as well and make some suggestions. Do you have soldering equipment?
Post Merge: March 19, 2019, 11:06:12 am
A resistor to ground ahead of the electrolytic capacitor in most circuits seems to be the missing ingredient in toning down the distorted audio output. This single item seems to be consistent across other fixes. I did also remove what was apparently an unnecessary ceramic cap in the chain.
I have a Super Joy III here, but it might be dead. I will certainly give you instructions on what to use and where to solder to. If I can get my Super Joy working, that will help me narrow down possible solutions.
Could you post some examples of the troubles you're having to YouTube?
Is this the same as yours?
https://youtu.be/kVU6U-8wXjI (https://youtu.be/kVU6U-8wXjI)
Wow, you're actually missing sound channels! That might not be fixable if the chip is damaged... :-\
Has it always been like that?
Hi :l what doy you think about this sound problem? :help: https://youtu.be/hWEiAm7Ehzo
Quote
FAMICOM_87, it does sound not bad but missing a few sound channels.
What console is it from?
https://www.famicomworld.com/forum/index.php?topic=13660.15
Here the last one with Video problem that was fixed :)
Yeah I'd recommend replacement. With the gloptop NOAC in those, if you have audio channels flat out missing, they're not coming back. Sorry, mate.
Post Merge: March 23, 2019, 07:53:39 pm
Quote from: FAMICOM_87 on March 22, 2019, 11:43:10 pm
Hi :l what doy you think about this sound problem? :help: https://youtu.be/hWEiAm7Ehzo
Hmm. Same problem with other, official carts?
Quote from: Pemdawg on March 23, 2019, 07:50:55 pm
Yeah I'd recommend replacement. With the gloptop NOAC in those, if you have audio channels flat out missing, they're not coming back. Sorry, mate.
Post Merge: March 23, 2019, 07:53:39 pm
Quote from: FAMICOM_87 on March 22, 2019, 11:43:10 pm
Hi :l what doy you think about this sound problem? :help: https://youtu.be/hWEiAm7Ehzo
Hmm. Same problem with other, official carts?
The sound gluch is presented on all kind of cartrages and that ntegrated games
Quote from: FAMICOM_87 on March 24, 2019, 01:45:25 am
Quote from: Pemdawg on March 23, 2019, 07:50:55 pm
Yeah I'd recommend replacement. With the gloptop NOAC in those, if you have audio channels flat out missing, they're not coming back. Sorry, mate.
Post Merge: March 23, 2019, 07:53:39 pm
Quote from: FAMICOM_87 on March 22, 2019, 11:43:10 pm
Hi :l what doy you think about this sound problem? :help: https://youtu.be/hWEiAm7Ehzo
Hmm. Same problem with other, official carts?
The sound gluch is presented on all kind of cartrages and that ntegrated games
This appears, based on other videos I have seen, to be a shortcoming of some famiclone a.
Unfortunately there no known remedy, as the glitch is part of how the clone chip is made.
this thing do not even have 7805 , and work directly on 6V , they went too cheap : >:( ! WTF?
BTW the case is very well done :)
Quote from: FingeredDonut on April 14, 2019, 07:11:40 am
Good news, destroyed the Super Joy III and put it out of its misery and bought a new Famiclone which is the FC Compact or RS-35 as it is known as. It costs only £29 at my local Cash Converters, the triangle sound channel, however, doesn't work but it can be easily fixed here: http://forum.pegasus-gry.com/index.php?topic=7014.0 (polish language.) But that won't interrupt gameplay, I hope it works with the Famicom Disk System?
You are in PAL territory. Is your famiclone PAL or NTSC?