PCM redirects here. For other uses, see PCM (disambiguation). Pulse-code modulation (PCM) is a method used to digitally represent sampled analog signals. It is the standard form of digital audio in computers, compact discs, digital telephony and other digital audio applications. In a PCM stream, the amplitude of the analog signal is sampled regularly at uniform intervals, and each sample is quantized to the nearest value within a range of digital steps.
1 As well as MLA, APA papers are also double-spaced with 1-inch margins on each side. 2  APA guidelines recommend you to use readable and clear font, such as Times New Roman, 12 pt.  The main distinction of APA style is a ârunning headâ at the top of each page.
Know the format of your soon-to-be manuscript. Formatting your paper in APA style means paying attention to mechanical details such as typeface, line spacing, margins, and page headers.In order to get full marks on your assignment, you'll need to meet all of these requirements.1  Use a 12-pt serif typeface, like Times New Roman, for the text of your manuscript. Don't forget your header! 2  For this page, it's your title and page number. 3  In your abstract, be sure to include all the extras: your research topic, questions posed, information on participants, methods, results, analysis of data, and extra tidbits on your conclusion.