This paper has a good overview of the basics behind the CD Digital audio and various forms of DAC conversion and filtering/over sampling and quantization/dither techniques used.
Needless to say there are many competing methods for DAC conversion, however, each method when implemented correctly delivers a sound quality that is of extremely high quality. I find myself unable to hear differences between several different DAC methods...be it in my Digital Sound Processor pre amp or my various CD players.
DSD is a digital technique used in SACD....the technique is also used in a similar analog fashion by one bit DAC's for CD players. The idea is to use one bit for the data and sample at a very high rate. Like a light switch being turned on and off at very high speed to create the desired lighting level....the technique works but it does introduce high frequency noise outside the audible band that is filtered out by a low pass filter in the case of CD...or in the case of SACD it appears to be sent through your equipment (some people question the logic of putting high frequency noise above the audible band through your tweeter...some are concerned about the heat it may generate)
http://www.tc.umn.edu/~erick205/Papers/paper.html#strengths
Needless to say there are many competing methods for DAC conversion, however, each method when implemented correctly delivers a sound quality that is of extremely high quality. I find myself unable to hear differences between several different DAC methods...be it in my Digital Sound Processor pre amp or my various CD players.
DSD is a digital technique used in SACD....the technique is also used in a similar analog fashion by one bit DAC's for CD players. The idea is to use one bit for the data and sample at a very high rate. Like a light switch being turned on and off at very high speed to create the desired lighting level....the technique works but it does introduce high frequency noise outside the audible band that is filtered out by a low pass filter in the case of CD...or in the case of SACD it appears to be sent through your equipment (some people question the logic of putting high frequency noise above the audible band through your tweeter...some are concerned about the heat it may generate)