Transform Your Portable Devices Audio Into a Balanced Analog Signal Convert the digital audio from your USB-equipped device into a quality analog signal with the Whirlwind pcUSB. This direct box takes the audio on your laptop, smartphone, or tablet and transforms it into a balanced, transformer-isolated analog signal that you can connect to a PA or console. Experience great sound thats free of noise and distortion, thanks to a ground lift and pad. The 2-channel pcUSB runs in both stereo and mono.Transforms your portable devices digital audio into balanced analog The pcUSBs USB input is compatible with nearly any laptop, smartphone, or tablet, and operates at 16-bit/32kHz, 44.1kHz, and 48kHz sample rates. The pcUSB is also bus-powered, receiving power from the host device. Eliminate hum and noise with the flick of a switch If you experience hum or noise while using the pcUSB, move the GND/LIFT switch to the LIFT