ABXTester is an Mac application to conduct ABX tests for you.

An ABX test is a method to examine if you can distinguish two sound samples A and B. In an ABX test session, a sound sample X, which is randomly picked from A and B, is played, and you have to answer if the sample is either A or B. You repeat this trial multiple times and then get assessed if you can really distinguish A and B.

ABX test and ABXTester are useful when you need to asses objectively if you can distinguish the difference in sound quality between two sound samples originated from same single sound source but with different compression ratios.

- Prepare two sound samples A and B with two different compression ratios from single sound source, or music.
- Launch ABXTester.
- Select the sound samples A and B.
- ABXTester prepares five sound samples X1 through X5, each of which is randomly picked from A and B. For each sample, listen carefully and answer whether the sample is either A or B.
- Check if your answers are correct.
- If you could answer correctly for X1 through X5, you can proudly declare that you can distinguish the difference coming from the different compression ratios. Congratulations!

- You can pick test samples A and B from your music files.
- You can play test samples A, B and X during your test.
- You can answer whether played X is A or B.
- You can try five times in one test.
- You can get the percentage of successful trials.

Future Plans
- Enable users to change the number of samples to try.
- Enable users to save the test results.

System Requirements
- Mac OS X 10.6 or later

Revision History
- 0.9March 21, 2011First release

Ratings and Reviews

3.8 out of 5
14 Ratings

14 Ratings

rakingleaves ,

Great little app

I'm surprised no one has reviewed this yet. This app works exactly as advertised and is very useful if you're not sure what bitrate to use for ripping music. The UI is a bit rough around the edges, but it was easy enough to figure out how to use. Very glad to have found this.

matonmacs ,

It’s a start, but could be so much more.

Hey you get what you pay for, right? The app is certainly usable, but it really needs some things:

1) FLAC support!

2) It should allow you to randomize the A and B (i.e. you select the two files, but it doesn’t tell you which one is A and which is B).

3) It should be an option to tell you which ones you got right/wrong.

4) It would be nice if it could match levels (though as long as you’re creating the compressed file yourself I guess you can handle that).

5) It should do 10 tests (obviously you can just do it twice so no biggie that).

Anyway, thanks to the dev, but it would be great to add some of these features.

Doug Young ,

Nice and easy to use

Nice little app, and the price is right. I wish it allowed more than 5 trials for more accuracy, and I'd feel a lot more confident if it didn't report the results as "persent" (mispelled!).


252.5 KB

OS X 10.6 or later



Age Rating
Rated 4+


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

More By This Developer