Anyway, I still cannot say that what is seen here would always be the case. However, the only result that looked good in FFT was achieved with ASIO drivers. Spotify uses lossy audio codec causing some extra spectral deficiencies. Results vary depending on how the test tones are created, what is the sample rate of the file, the setting in Windows, etc. For these tests I used foobar2000 but also tried Windows Media Player and Spotify.
#Bitperfect windows 10 windows 10#
I have tried these with one Windows 7 computer and one Windows 10 computer and with two different USB audio devices: miniStreamer and PCM2707C-based H-DAC. ConclusionĬomparing the first and the last FFT image tells a lot. H-DAC USB to analog output using ASIO4All driver, 0 dBFS tone. THD+N level of the signal below is -78 dBV which is quite bad number for a modern digital audio device. Obviously there is some resampling or whatever and the implementation is very poor, likely to achieve faster execution. And the results are even worse if sample rate is set to 44.1 kHz. You would imagine there was no resampling and output would be quite clean, if not bit-perfect. This signal is generated in foobar with 48 kHz sample rate and Windows sound device is set to 48 kHz / 16-bit output. Take a look at the spectrum below showing 997 Hz 0 dBFS signal played with foobar2000.
This is purely a technical inspection but the differences are significant so I can easily imagine some golden ears can spot the difference.
Its PCM2707C-circuit is capable of “only” 48 kHz / 16-bit audio so I was not expecting superb measurement results but was still amazed how bad they actually were. This post arose as a consequence of testing the USB-input of H-DAC.
#Bitperfect windows 10 drivers#
0 kommentar(er)
