Archimago wrote: > Hey guys. Just posted some measurements on the Pi3 + HiFiBerry DAC > combo. I suspect many of us here are already doing this kind of thing > with Pi computers and various other SBC's. Certainly makes an > inexpensive system for a Squeezebox replacement with piCorePlayer > installed... > > http://archimago.blogspot.com/2016/10/measurements-raspberry-pi-3-hifiberry.html
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 " ------------------------------------------------------------------------ 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
