We all strugle sometimes to find the right frequency in our EQ or choosing perfect ratio in compressor
Also some of us can have problems to tune kick in tonality of a mix.
I’ve recently found great ear-training exercies for both begginers and advanced mixing engineers.
Here is direct link to frequency test,but there you can also find another tests,like pitch,dynamic and other useful stuff
And here is the blind tests for developing good revaltive pitch and interval,chords hearing etc
Hope this will be useful for begginers and expirienced musicians