These pages use javascript to play the audio files, so if you have a script blocker, enable javascript for this domain.
Also Chrome browser seems to work better - some Firefox browser versions get stuck at the 'Downloading...' part.
Starting Trial (1/10):
Downloading...
You will first listen to the Reference samples for Low-Res and Hi-Res (to get an idea what they sound like).
Then you will Listen to an unknown sample, and then Vote whether it was Low-Res or Hi-Res.
Every time you Vote, results will be shown, and a new trial will start (the unknown sample will again be freshly randomized, so you can Listen and Vote again).
Your results (success rate) will be shown below.
A 100% success rate implies your equipment is outputting high quality audio, and you are able to hear the difference. If your success rate is around 50%, that means you are doing no better than chance - you should make sure your equipment is capable of outputting 24-bit/96kHz, or 32-bit/192kHz, and that you are using speakers or high-quality headphones.
NOTE: reload the webpage to reset the trial count.
Taking inspiration from the double-blind test on this webpage: The 16-bit v/s 8-bit Blind Listening Test, Part 2., we have devised a similar ABX double-blind test for distinguishing Hi-Res 24-bit/32-bit or 96kHz/192kHz audio samples from their downsampled versions (16-bit/44.1kHz).
The format for testing outlined above is called ABX testing - where the original reference samples are shown to user as A and B, and the user has to identify an unknown (X) sample (whether it is A or B). Thus the name ABX for this style of testing.
This is a double-blind test (a double-blind test removes user and administrator bias from the experiment).
In order to make the Hi-Res and Low-Res versions indistinguishable in content, we will create the Low-Res version by just downsampling the Hi-Res version using Audacity program.
However, when testing Android devices, and the advantages of recording in 32-bit/192kHz, it maybe better to use two identical devices and record the same real-world event, with one device recording at 32-bit/192kHz, and the other at 16-bit/44.1kHz. Android Marshmallow and above versions support 32-bit/192kHz audio recording. However, you will get best results with a Hi-Res Audio certified android device, like LG V20, or Samsung S8. These devices can record at 24-bit/96kHz and higher resolutions.
Listen on speakers, or high-quality headphones. You will NOT notice a difference on low quality earbud earphones
Make sure your device isn't downsampling to some default sample rate.
For Mac laptops, run 'Audio MIDI Setup' to change from 24-bit/44.1kHz to 32-bit/96kHz output (earphone jack), or use optical output and use 'Audio MIDI Setup' to change to 32-bit/192kHz output.
You have to be sure that the device is outputting 32-bit float at 192kHz output (or the highest it can support). Macs by default will do 24-bit/44.1kHz only on earphones, but by going into "Audio MIDI Setup" you can increase this from "24-bit Integer 44.1kHz" to "32-bit float 96kHz" as outlined here:
How to find and play high-resolution audio on the Mac
And for higher sample rates of 192kHz on Macs, you have to use the optical output as outlined here:
Play high sample rate digital audio on Mac computers (optical)
For Windows machines, set your sound interface as the default interface, and set the bit-depth/sample-rate for the device.
On Android, use Hi-Res Audio certified Android devices like the LG V20, Samsung S8 to test. The Neutron player on android plays 32-bit WAV - this app has a free trial, but is usable after you dismiss the nag screen:
Neutron Music Player (Eval) by Neutron Code Limited
Hi-Res Audio certified Android devices will output 24-bit/96kHz, and some may do 192kHz or higher.
You can use our app to record 32-bit/192kHz WAV on Android Marshmallow and above devices. Hi-Res Audio certified devices like the LG V20 and Samsung S8 will give better results:
Amazing MP3 Recorder