Many free styles are normalized too low. Solution: Use a free tool like Audacity to normalize the WAV loops inside the style, or use the Yamaha Style Volume editor to boost +30.
Yamaha keyboards have different drum maps. A style made for a PSR-550 might sound wrong on a PSR-SX900 because the Tabla notes (Dha = Note #45) might map to a Bass Drum on your keyboard. Solution: Download styles specifically labeled for your model number (e.g., "For PSR-S775"). tabla beats for yamaha keyboard free download extra quality
Happy playing, and keep the Taal alive!