A refrigerating machine having a compressor driven by a motor. Data is collected and compiled from multiple sources, including government databases, web pages, and regulatory documents. The client is given a playlist uniform resource locator for publishing on its web site, the URL including the stream ID. A method of utilizing mechanical stress to tune an optical resonator includes applying physical force to the resonator by subjecting a piezoelectric material to an electric field, the physical force changing a resonant frequency of the resonator.