4U+ BlindTest

4U BlindTest

HOFA 4U+ BlindTest allows an objective comparison of equipment (e.g. plugins) inside your DAW. Only if you do unprejudiced comparisons, you will achieve the best sound possible.

Very often a look or a name will draw off your attention:
You believe that you are hearing differences that do not exist, due to the correlation of visual and aural perceptions and associations. So you compare your ideas of products rather than their actual sound character.

To avoid this problem, we have developed a reliable blind test that lets you concentrate on what is important: the sound!

This helpful tool arose from our demand to develop the best plugins. We needed an option to measure our software fair-minded against the most popular competitive products.

To use it, simply insert 4U+ BlindTest as last plugin on every track you’d like to compare. Now, only the track which is set on “SOLO” will play; all other tracks are muted.

4U BlindTest Shuffle

Most important: The Shuffle-Button
Clicking on “Shuffle” will anonymise the tracks and put them into a random order. Now you can switch around between the different signals to judge them objectively: Assign a ranking and add your comments about your aural impressions. Later you can uncover the track names.

You can also run a sequence in which you shuffle and evaluate several times. This way you get average ratings, creating your personal sound study. The comments will be summarized, so that you can check if your aural impression was always the same.

To make for really objective results…

… there is a peak display and a gain control per track, so you can avoid influences caused only by loudness differences.

… the GUI is freely scalable, so that you can use it to hide anything on your screen that may influence your decisions like your DAW’s mixer panel.

4U BlindTest Detail


Not always should all tracks be compared. Simply drag unused tracks to the “INACTIVE” section to exclude them from shuffling.
This can also be used to sort out tracks during a test run.



Info: Click here to download the manual.

Download: Click here to download the installer.

HOFA 4U+ BlindTest is free. Up to 3 tracks can be compared.
Furthermore, HOFA 4U+ BlindTest can be licensed to be used with an unlimited number of tracks.
This upgrade can be done at any time for 39,90 €.


>> Save big with the Bundles by HOFA-Plugins!

Press comments & tests:



During the test, we were literally excited about the BlindTest-Plugin because it fits perfectly in our day-to-day routine. Audio engineers with a tendency to indecision or a weakness for bling-bling plugins get a highly helpful tool with this plugin. […] With 4U+ BlindTest, HOFA presents a both simple and efficient option for quality assurance. Thumbs up.

Professional audio



Users who have more than one plugin for each task on their hard drive and who really want to get to know their tools, receive a powerfool tool with HOFA 4U+ BlindTest, a factual must-have.




The coolest freeware utility plugin this year was 4U Blind Test, an incredibly useful tool to have around …

read full review here



Clever integration, easy handling and nice additional functions: this tool is highly convincing – not only in his main feature, the neutral comparison of tracks and plugins.


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