Yeah, the digital audio part is so loud it's clipping, while FM seems normal. If there's no separate volume control it seems like possibly a hardware fault.

I've noticed that even though I lower the Master volume in mixerset and save, after I play and return to the mixerset, the master volume is all the way up on itself.

That clipping noise doesn't happen with every game though, so I'm not sure how much that is hardware's fault :\

Try SB16SET and stuff from different driver packages. I guess besides that the usual troubleshooting would start with resources - other stuff interfering with the DMA/IRQ.

SB16SET ? Where can I find that ?

Some games use the mixer themselves.
You could put a voltage divider (4 resistors or a stereo potentiometer) into the audio cable.

What's all that witchery ? 😕

A long shot, just to rule the obvious: If I'm not mistaken, this card has a jumper to configure output as amplified (for unpowered speakers) or as line-level (not using the on-board amp, intended for powered speakers). Are you sure you don't have it configured to use the amp and then passing the amplified signal to your line-in? Again, not saying you are, just a though.

Elia1995 wrote:

but it does that when I plug it in my main PC's Line In to record the sounds when I have to record videos.

Are you sure you're using Line In and not the microphone port (often colored pink)? Because the microphone port often has a separate "microphone boost" setting. (I suppose it might even be active even if you're using Line In, depending on your drivers.) You can disable that in your Sound control panel.

Yeah, I tried both in the Microphone In and the Line In, but in both jacks the audio boosts like that, plus the FM music is just fine, it's only the sound effects that always get muffled like that.

Tested with Duke Nukem 2, which doesn't maximize the mixer on his own, the clipping indeed goes away when the master isn't at maximum in the mixerset.
Now we need to find a way to stop other games from messing with the mixerset.

Farting noises you say? It's probably just the OPL3. Sounds like everything is functioning normally.

No no, I triple checked the mixerset and it's due to the volume, when master is maxed it does that, but when I lower it, some games max it out again automagically.

Today I turned on the PC and it was completely mute, games are all mute, I checked mixerset and I found all the gains at x8, everything maxed out.

How can I completely remove the drivers, from everywhere and start fresh with them ? I already downloaded a new SB16 drivers pack from Vogons.

The CT2950 uses a TEA2025b as a pre-amp , and possibly amp for non amplified speakers(need to check a diagram to see), it might have malfunctioned.

Now it refuses to detect the I/O Address, I'll try to unplug, blow in the slot and plug it back in later, if it's hardware-related.

If you have some contact cleaner or isopropal alcohol , you can clean the edge connector of the card, Ive had several that failed over time because the connector got groggy.

This however wont explain the clipping sound you got from the card

Elia1995 wrote:

it doesn't do that when I plug it into my oldschool / secondary PC speakers

If this is truly the case, then whatever the problem is, it is probably pointless trying to solve the problem on your Olivetti.

There is probably something related to how you are recording the audio in Audacity.

It however happens when the master level in the mixerset is maximized, some games auto-maximize it and does that.
However it sounds that bad only with the line out-line in on my main PC, if I use the speakers there is still just A BIT of such distorsion, but not as much noticeable as from the line out jack.