: The audio file bypasses the Windows mixer entirely. A 24-bit/192kHz FLAC file is transmitted directly to the AB13X chip without alterations.
The AB13x driver is optimized specifically for the XMOS threading architecture. By handling the USB transfer protocol more efficiently and communicating directly with the hardware buffer, it can achieve round-trip latencies that rival PCIe internal cards—often at buffer sizes as low as 16 or 32 samples. This exclusive optimization makes it viable for real-time monitoring and virtual instrument playback without the "lag" feeling. ab13x usb audio driver exclusive