sox Sample_192000Hz_24bit.wav 24-96000.wav rate -v 96000 dither -s
sox Sample_192000Hz_24bit.wav -b 16 16-44100.wav rate -v 44100 dither -s
sox 16-44100.wav -b 24 16-44100-24-96000.wav rate -v 96000 dither -s
foo_abx 1.3.4 reportfoobar2000 v1.0.32010/06/07 18:25:51File A: C:\Dokumente und Einstellungen\Christian\Desktop\16-441to24-96.wavFile B: C:\Dokumente und Einstellungen\Christian\Desktop\24-96.wav18:25:51 : Test started.18:26:44 : 01/01 50.0%18:27:09 : 02/02 25.0%18:27:26 : 03/03 12.5%18:27:44 : 04/04 6.3%18:28:00 : 05/05 3.1%18:28:21 : 06/06 1.6%18:28:38 : 07/07 0.8%18:28:52 : 08/08 0.4%18:29:06 : 09/09 0.2%18:29:17 : 10/10 0.1%18:29:33 : 11/11 0.0%18:29:46 : 12/12 0.0%18:30:03 : 13/13 0.0%18:30:26 : 14/14 0.0%18:30:42 : 15/15 0.0%18:31:04 : 16/16 0.0%18:31:08 : Test finished. ---------- Total: 16/16 (0.0%)
foo_abx 1.3.4 reportfoobar2000 v1.0.32010/06/07 16:14:52File A: C:\Documents and Settings\Administrador\Mis documentos\Downloads\24_96.flacFile B: C:\Documents and Settings\Administrador\Mis documentos\Downloads\16_441to24_96.flac16:14:52 : Test started.16:17:04 : 01/01 50.0%16:17:31 : 02/02 25.0%16:18:20 : 03/03 12.5%16:19:20 : 04/04 6.3%16:20:51 : 05/05 3.1%16:20:52 : Test finished. ---------- Total: 5/5 (3.1%)
16_44to24_96.wav has an unusual HF noise component(peak level is around -77dBFS) in the 16~21kHz range. (possibly due the effect of dithering?)
Well whether the noise is audible or not, it seems there's already someone who successfully ABXed the original samples.
it seems there's already someone who successfully ABXed the original samples.
Another reason why ribbon tweeters are so supremely accurate is their ability to reproduce frequencies far above our normal hearing range. Even though we can’t hear these “ultrasonics,” the lower harmonics they generate do affect the way we experience the stereo image. For instance, a 30 kHz signal is too high for us to hear, but we can hear its first sub-harmonic (15 kHz), second sub-harmonic (7.5 kHz), and third (3.75 kHz), etc. All these sub-harmonics combine with the primary sound to create stunning realism.
Wouldn't IM artifacts within the audible band have been audible with the Cantons also?
Sadly I had to let the Elacs go, because their WAF was too low. I'm looking for a satellite/sub combo with comparable bandwidth right now but haven't decided on anything, yet. The test sample has very high amounts of HF energy, do you have any experience with IM distortions in plain air?
You might want to exclude nonlinear distortion in the playback system as a potential source of problems with the test by doing some listening tests with test files composed of sine waves 4 KHz apart, both > 22 KHz, at several different frequencies. IOW one test would be composed of tones at 24 and 28 KHz, another test composed of signals at 32 and 36 KHz, and another at 38 and 42 KHz. Be careful with these test tones, as it would be easy to turn them up high enough to involve large amounts of power without you hearing that they are loud. If there is excess nonlinear distoriton in your system you'll hear a 4 KHz tone.Another, potentially safer test signal would be white or pink noise high pass filtered at 22 KHz. If there is excess nonlinear distoriton in your system you'll hear noise in the normal audio band.
I can ABX (again and again, with different hardware and conditions) 16/44.1 vs 24/96. But it's actually enough subtle and not so obvious as lossy compression at high bitrates or 32 kHz vs 44.1 kHz.