Again in the August HifiNews, this time from Paul Miller.
There has been a lot of discussion about the benefits and cons of going Non-Ovesampling, however one aspect all of us may not had considered is that of high quality downloads in conjunction with NOS DACs.
This is one area NOS could actually work well, in that playing native high res recorded music so there is no oversampling in the 1st place, this means if the NOS DAC supports the higher rates the issues of image duplication should not be an issue, and therefore the benefits outweigh any cons.
This came about due to PM having access to AMR's CD-777 that also is an outboard DAC supporting 24bit/192khz and also NOS, so any true high res recordings can be played with the NOS setting and the associated issues are pushed way beyond 30khz for the digital image and distortion no longer an issue.
PM does a comparison that showed using NOS for 44.1khz and 20khz tone generated both distortion in the audible band and image problems occuring under 30khz.
With NOS and 192khz using same tone, no distortion was measured while the image problem was pushed up to 55khz.
Of course this may raise the technical and theoritical discussion on whether this can have an affect on well designed preamps and amps that have a wide bandwidth, but initial considerations are that this could be the ideal way to listen to high rez recordings.
More info can be seen in PM August Opinions page in Hifinews, definitely thought provoking and one PM-Hifnews is going into more detail next month with more products.
Cheers
Orb
There has been a lot of discussion about the benefits and cons of going Non-Ovesampling, however one aspect all of us may not had considered is that of high quality downloads in conjunction with NOS DACs.
This is one area NOS could actually work well, in that playing native high res recorded music so there is no oversampling in the 1st place, this means if the NOS DAC supports the higher rates the issues of image duplication should not be an issue, and therefore the benefits outweigh any cons.
This came about due to PM having access to AMR's CD-777 that also is an outboard DAC supporting 24bit/192khz and also NOS, so any true high res recordings can be played with the NOS setting and the associated issues are pushed way beyond 30khz for the digital image and distortion no longer an issue.
PM does a comparison that showed using NOS for 44.1khz and 20khz tone generated both distortion in the audible band and image problems occuring under 30khz.
With NOS and 192khz using same tone, no distortion was measured while the image problem was pushed up to 55khz.
Of course this may raise the technical and theoritical discussion on whether this can have an affect on well designed preamps and amps that have a wide bandwidth, but initial considerations are that this could be the ideal way to listen to high rez recordings.
More info can be seen in PM August Opinions page in Hifinews, definitely thought provoking and one PM-Hifnews is going into more detail next month with more products.
Cheers
Orb