arnyk wrote: > Interesting data point. As the report mentions, one possible area of > concern is the device's approximate -80 dB suppression of spurious > responses and noise. This is about 16 dB poorer than CD quality (-96 > dB) but about 20 dB better than a typical real world threshold of > audibility (-60 dB). > > These days true CD quality performance (ca. -96 dB) is available at the > analog outputs of an < $100 BD player which usually includes a network > (LAN+WAN) media player with considerable power and flexibility. > > Not exactly an apples-to-apples comparison, but not too far off when all > costs are included would be the performance of an Intel NUC micro-PC's > the Realtek ALC283 on-board chip audio system: > > http://stn-bc.ru/?q=node/835 > > " > To assess output sound path designed for headphones or external > speakers, we resorted to the instrumental testing using an external > sound card Creative E-MU 0204 USB and utility RightMark audio Analyzer > 6.3.0. Testing was conducted to stereo mode, 24-bit / 44.1 kHz. > As a result of testing the audio section in the laptop Acer Aspire > R7-371T was rated "very good." Full report with the test results in RMAA > 6.3.0 software on a separate page, the following is a brief report. > > Frequency response (in the range of 40 Hz - 15 kHz), dB > 0.02, -0.09 Excellent > > Noise level dB (A ) > -86.4 good > > dynamic range, dB (A) > 86.2 good > > THD,% > 0.0057 Very good > > THD + noise, dB (A) > -74.2 Mediocre > > Intermodulation distortion + noise,% > 0.030 good > > Crosstalk dB > -85.8 Excellent > > Intermodulation at 10 kHz,% > 0.017 Very good > > Overall very good > "
Hi Arny, Not sure which part in the testing you're referring to with -80dB. If it's in reference to the "digital filter composite", I think that's a result of the limitations of the digital antialiasing filter in handling that extremely high amplitude wide bandwidth white noise and the occasional inter-sample over when doing the upsampling. Overall though from the Rightmark results, the HiFiBerry DAC+ Pro will *easily* beat that NUC! Plus this device will be able to handle 24-bit audio with noise floor lower than -105dB in the audible spectrum... Archimago's Musings: (archimago.blogspot.com) A 'more objective' audiophile blog. ------------------------------------------------------------------------ Archimago's Profile: http://forums.slimdevices.com/member.php?userid=2207 View this thread: http://forums.slimdevices.com/showthread.php?t=106213 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
