LD Systems LAX 3 USB, 3-Channel USB Mixer with Phantom Power The LAX 3 USB by LD Systems is the ultracompact interface for hard disc recording on home computers with a sampling rate of 44.1 kHz. It simply connects to the USB 2.0 port of the computer, which also supplies it with power. A power adapter with USB- A connector and a USB cable are included as an alternative power supply. The LAX 3 USB is compatible with all Windows and Apple operating systems from Windows XP and Mac OS X 10.5 upward. The electronically balanced microphone channel with 20-volt phantom power and a maximum amplification of 50 dB has a combo socket and can also be used used as a mono line in channel. The line input L/R of the stereo channel 2/3 uses RCA sockets. Keyboards or drum machines, for example, can be connected here. The bass and treble of the microphone channel can be boosted or cut by up to 15 dB. Additional sliders set the position of the microphone channel in the stereo spectrum and the balance of the stereo channel. In addition, the LAX 3 USB has in- and outputs for an external sound source or recording device; the input can be switched to the master output and/or headphone/monitor output. The mix volume is controlled by two master controls separately for the master output and the headphone/monitor output. For a perfect start in the world of digital home recording, we recommend the Open Source software Audacity, which is available as a free download.