Kramer Electronics 830 830 is a high performance tone generator with digital and analog audio signal outputs. It outputs an audio sinewave in all of the popular formats and sampling rates for testing and alignment. Multi-Standard - AES/EBU, AES-ID3, S/PDIF, Toslink optical. Tone Frequency - 40Hz, 100Hz, 1kHz, and 10kHz. Sampling Rates - 32k, 44.1k, 48k, and 96k. Left and Right Channel - On or Off (selectable). Compact Kramer TOOLS - 3 units can be rack mounted side-by-side in a 1U rack space with the optional RK-3T rack.