Archimago wrote: > Hi Arny, > Not sure which part in the testing you're referring to with -80dB. >
I'm referring to either of the THD+n or IMD+N measurements shown in the Audio Rightmark results at http://archimago.blogspot.com/2016/10/measurements-raspberry-pi-3-hifiberry.html, either sample rate. Either THD and IM are commonly called "Spurious Responses". In one THD test the THD is 0.0047% and in the other it is 0.0049%. In my book, six of one, half dozen of the other or about 0.005% In one IMD+N test the IM is 0.0077% and in the other it is 0.0066%. In my book, also about six of one, half dozen of the other or about 0.0075% 0.005% about the same as 86 dB down, while 0.0075% is more like 82 dB down. I approximated both quite roughly as -80 dB. The DAC chip in the Hi Fi Berry has a noise spec that is somewhat better than its THD+N or IM+N performance. While playing music and other signals, the THD+N or IMD+N numbers are probably more representative of its actual performance than the number for background noise. ------------------------------------------------------------------------ arnyk's Profile: http://forums.slimdevices.com/member.php?userid=64365 View this thread: http://forums.slimdevices.com/showthread.php?t=106213 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/audiophiles
