The original style used a Drum Kit that doesn't exist on the PA 50 SD. Fix:
Before any style download:
Based on community feedback, these are the genres where the PA 50 SD excels after downloading new content: korg pa 50 sd style download
The PA 50 SD has a powerful 4-band EQ on the master output. If your downloaded style sounds muddy: The original style used a Drum Kit that
The PA 50 SD uses a very old SD protocol (SPI mode). It hates SDHC (High Capacity) cards. Fix: Buy an old 512MB or 1GB SD card from a thrift store. Do not use an adapter for microSD; use a full-size SD card. use a full-size SD card.