I think it'd be for the best if people sent you PMs instead, so as not to veer anyone to a specific direction. I'll give these a listen and PM you 😀.

except for the diagnose sample id say b is of better quality (opl i guess)

Nice idea 😀 I'm curious what the results are. I can't play these in my browser, so I'll have to download them to play them.

PM'd my results.

Thanks for providing the opportunity for comparison. Neither of these games is among my own favorites, but the difference between samples is easy to detect.

wolf3d is surprisingly similar. Dune not so much 😀

Now I'm not so eager to fix my newly aquired ct2x40 that weeks to be missing a cap. It's the cqm version.

Im not sure i have enough cqm experience or enough time with dune 2 to guess but to me the Dune B sample sound better

PMed. I grew up with OPL so I'd like to think I can spot the difference. Never played Dune itself, but there are enough similarities to games like Blackthorne and such that I can take an educated guess.

Thanks all for your respond, I think it's time to put the walkthru. I appreciated no one botherd me with recording quality and such. I really did that test for myself to have a grip about that so called difference. To be honest, I didnt expect there was so much and it was just pretension.

Most people got the diagnose_X wrong which bring me to a question about the diagnose.exe program. There might be some quirks here, for instance, I've also noticed that even if I mute the mixer, diagnose would reset it back while it play it's stuff at the end of the diagnostic.

I was expecting everybody would get 100% at the first time because the CT4520 was much noisier than the CT2230 and it would give, of course it was obvious to me when watching silences in the waveform. Even though I reboot in between each recording and re-set sbmixer to the same settings and double check, the two cards where not the same level and I had to use the adjust volume afterwards. Interestingly enough was that cards had not always the same difference.

Results
----8<--------8<--------8<----
adlib-test_cqm = A
adlib-test_opl = B
diagnose_cqm = A
diagnose_opl = B
dune2_cqm = A
dune2_opl = B
wolf3d_cqm = B
wolf3d_opl = A
----8<--------8<--------8<----

I didn't pick up the background noise in my comparisons, only listening through some TV speakers at normal volume rather than the headphones. I suspect the SB diagnose.exe represents material that they tuned the CQM design for, because the difference was much harder to spot.

firage wrote:

I didn't pick up the background noise in my comparisons, only listening through some TV speakers at normal volume rather than the headphones. I suspect the SB diagnose.exe represents material that they tuned the CQM design for, because the difference was much harder to spot.

that would bring the question : is there's a way to detect the kind of chip on the card ?