CD Standards

This is going to show what the standards are for CDs

·      Format: Wav

·      sample rate: 44100Hz - The number of samples that are recorded per second - measured in Hz. - Chris Bagwell. (1998). Audio File Formats FAQ Audio File Formats FAQ .Available: http://sox.sourceforge.net/AudioFormats-3.html. Last accessed 13th Feb 2012.)

·      Bit Depth: 160 kb's the number of points that are definable per sample. as the bit depth increases, the number of points that are noted, increases. For example: on an axis, a low bit depth would have a point on every value from 0-10. Whereas, a high bit depth, would have a point that can be noted on every number between 0 and 1000. 1 and 1000 in this case, are the same value but the accuracy of the points, increases.
      All this basically means is that, the higher the bit depth, the higher the resolution of the signal. - Image-Line. (). Exporting Project Dialog. Available: http://www.image-line.com/support/FLHelp/html/fformats_save_wavmidmp3.htm. Last accessed 13th Feb 2012.

·     Nyquist – Shannon Sampling Theorem: this is the theory of the conversion of an analogue signal to a digital signal. This is how many samples are taken per second. It is measured in hertz - Hz.

If the highest frequency component is stated as fmax, according to the nyquist theorum, the sampling rate must be 2fmax. If the sampling rate is lower than 2fmax, then not all o the signal will be represented properly.  - Davin Matsuda. (2002). Nyquist Theorem. Available: http://searchcio-midmarket.techtarget.com/definition/Nyquist-Theorem. Last accessed 13th Feb 2012.