[custom_adv] An album may be recorded in a recording studio (fixed or mobile), in a concert venue, at home, in the field, or a mix of places. The time frame for completely recording an album varies between a few hours to several years. [custom_adv] This process usually requires several takes with different parts recorded separately, and then brought or "mixed" together. Recordings that are done in one take without overdubbing are termed "live", even when done in a studio. [custom_adv] This process usually requires several takes with different parts recorded separately, and then brought or "mixed" together. Recordings that are done in one take without overdubbing are termed "live", even when done in a studio. [custom_adv] Studios are built to absorb sound, eliminating reverberation, so as to assist in mixing different takes; other locations, such as concert venues and some "live rooms", have reverberation, which creates a "live" sound. [custom_adv] Recordings, including live, may contain editing, sound effects, voice adjustments, etc. With modern recording technology, musicians can be recorded in separate rooms or at separate times while listening to the other parts using headphones; with each part recorded as a separate track. [custom_adv] Album covers and liner notes are used, and sometimes additional information is provided, such as analysis of the recording, and lyrics or librettos. [custom_adv] Historically, the term "album" was applied to a collection of various items housed in a book format. In musical usage the word was used for collections of short pieces of printed music from the early nineteenth century. [custom_adv] An album is a collection of audio recordings issued as a collection on compact disc (CD), vinyl, audio tape, or another medium.