You cannot download it alone. Just grab the free FL Studio trial installer, install only the driver component, and you are ready to produce without lag.
If you are a music producer using FL Studio, you have likely encountered the term ASIO (Audio Stream Input/Output). While FL Studio works with generic Windows drivers (like Primary Sound Driver or DirectSound), these often introduce high latency (delays between hitting a note and hearing it) or cause audio crackles. Fl Studio Asio Driver Download
Audio is crackling or popping. Solution: Increase the buffer length in the ASIO panel (e.g., from 256 to 512 samples). You cannot download it alone