I’ve sampled the drums from the PSS-380. This should also cover the PSS-280, 290 and 390 (these use the YM7116AA OPK and YM7129 OPK2 ICs). The drum samples are stored on the IC and use the onboard DAC. They’re not the best drums ever, and it’s a little ridiculous that there are Latin patterns, etc. using only 6 drum samples. The playback sample rate for the drums is 18.643 kHz. They can be played individually from the test mode (hold the highest B and C keys while switching it on), so the sampling process was straightforward. There’s also an accent, but I didn’t record the accented/unaccented sounds.