Computer programming for content-based audio recognition software; Computer software design for content-based audio recognition software used on smart portable devices and servers; Updating of computer software for content-based audio recognition software used on smart portable devices and servers; Rental of computer software, namely, rental software for clients to recognize and match the designated audio software; Maintenance of computer software, namely, maintenance of designed and rented computer software with the software of repairing bugs; Computer system design in the field of content-based audio recognition; Installation of computer software, namely, software installation for clients to install audio recognition service for recognizing audio content on the servers; Conversion of computer programs and data of audio and video to data with recognized audio features, other than physical conversion; Computer software consultancy in the field of helping clients to design audio retrieval method and server configuration according its content type; Rental of online web search engine for recognizing and retrieving audio from the cloud; Providing the audio recognition based music information retrieval engine for global music; Software as a service, namely, hosting cloud based software for use by others to recognize and retrieve audio and charge clients based on actual query quantities; Information technology consultancy of audio recognition technology for big data companies and research institutions; Providing information on computer technology and programming via a web site to list APIs and SDKs from each service terminal though developer's platform; providing temporary use of on-line non-downloadable cloud computing software for global clients use in searching, recognizing and retrieving audio; Outsource service providers in the field of information technology of developing content-based audio recognition software to identify music and advertisements played in the media files; Computer technology consultancy in the field of content-based audio recognition for clients