First post, by Grue
Hello, I have connected a logic analyzer to my OPL2 and OPL3 card and recorded title music from 688 Attack Sub. My friend created software to turn these opl recorded signals to wav. Basically I recorded lines connected to the DAC chip. My motivation for this is to solve the real differences between opl2 and olp3, and I need digital signals to rule out analog states of the different sound cards out of the equation.
Here is my test recording, it was OPL3 on the left channel and OPL2 on right. I had bit difficulties to match the sample rates of the recordings, but it's tuned so it should be easy to spot any differences.
https://sid.fi/~grue/688_attack_sub_opl3_left … igital_rip.flac
Now, I need suggestions on Adlib tunes I should record and make comparison to find out the real differences if there are any. It would help if those tunes could be played easily without playing games in to some point.
Picture of my OPL3 recording session while ago.