We will think about how this could be added. Thanks for the suggestion, and enjoy your audio!

Bit perfect test are easy within PCM coding, where you have "real data" for compartment. Best to do it using SPDIF I/O.

Now when it comes to PCM at the DAC & ADC, a proper generated signal with dither will do it on the analog chain too.

For DSD the signal, a proper generated signal will do it on the analog chain too, but a compare the stream while it is very random and not easy to fulfill!

Currently I am on a DSD wave generator to support DoP / DSD native and things gets really different than as on PCM

Hp

hpw wasn't aware of what you asked for. We would provide 16/24/32 bit PCM test files that when played back cause status indication of 'Bit Perfect' in the State Overview screen automatically. No need to activate the mode. We are still thinking about a test signal or bit pattern that will work but doesn't produce a crazy sound or destroying DC...that is the hard part...

I had an idea regarding the test pattern and checking procedure. I have sent you an email.

I thank you very much.

JRiver MC 22: All formats work perfectly. Now bit perfect even with DSD direct bit-streaming activated in JR MC.

Foobar2000: 16 and 24 bit ok, 32 bit file shown as 24 bit test passed.

ARM board with UBUNTU Server/MPD/UPMPDCLI: All formats work perfectly.

Yes, player software sometimes has problems to start and swallows samples. Or puts a fade-in and fade-out over the audio. Check if you can disable that.

I uploaded a new zip where all files now play for about 1 second.

Foobar2000 test works, same as BEJORO (16+24 o.k., 32 o.k. but tested as 24 bit).

All tests with Samplitude failed... Tested with older versions (Samplitude Pro X and legacy Samplitude 11).
EDIT:
IT WORKS! I must completely switch off dithering in Samplitude.

Michal

--------
Skylake system, latest Win10 64, latest drivers

I uploaded another new version where the files now play and sound similar, no longer offend drummers when looping, and include basic wav property info.

EDIT:
i feel really stupid now, just realized that Foobar2000 supports ASIO playback.
i installed the required components and it does work now.

Bluetooth-audio is usually compressed (aptX being an exception) and will fail the test.

Windows Media Player is unfortunately a poor choice, since its output goes through the windows mixer, which is not bit transparent - and so will most likely fail the test. You should look for a player which can use "WASAPI exclusive mode" or ASIO to communicate with your sound card.

Try grabbing foobar2000 and set it up in a way that use exclusive mode. Also - be sure the volume control on the player is set to 100%  - otherwise the signal gets changed and .. well, you get the idea.

Good luck!

edit: you need foobar2000 and this component: http://www.foobar2000.org/components/vi … out_wasapi

You need to use Musicbee, or another player that passes the test. The test simply tells you that the audio passes 100% unaltered from player to soundcard - and does so because it bypasses parts of the windows audio system, that can alter the audio. It does come at a price though: your soundcard is "exclusive" to the player while you are using it, meaning you have to close it to listen to audio from your browser or anything outside of the player.

Personally i think a good glass of wine will improve your listening experience more than the difference between bit-perfect playback and the standard windows audio path.

The Bit-Perfect-Test is a great tool. If successful it will tell you, that your signal chain does not alter the digital data.

Operating systems or player software, libraries, filters, configurations can alter the digital audio data in a significant way. To create an absolute reproduceable environment you need defined conditions.

And yes, it is audible and not a very good idea to use the Windows Media Player or Linux Pulse Audio etc. If you want the maximum audio quality you will have to create a bit-perfect chain.

And very important not only for the pro world but much more for the audiophile user who wants perfect sound quality, because they often do not have the technical knowledge.

I have not tested Sound Forge.

As already mentioned, it is "normal".

Foobar2000 uses 32 Bit floating point processing internaly. That limits the actual PCM output frame size to 24 Bit. That is absolutely no problem. If you intend to use 32 Bit audio files you have to use another playback software, e. g. JRiver Media Center.

New AE edition owner here. What a device!

I just tried this bit perfect test with Musicbee. ASIO works, but with WASAPI only 44.1kHz tracks. Any ideas why?

I would also like to hear RME's opinion on which one to use - ASIO or WASAPI, or are both the same, if they pass the bit perfect test?