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.
The requisites of APA format title page research paper is. 1  Double spacing in the essay with 1 inch margins on all sides on a standard 8 Â½ inch x 11 inch paper. 2  The fonts should be new times roman or any similar font 10-12 pt. 3  Every page will have the title on the left hand top corner.