The final listening test format

After much too-ing and frow-ing and re-evaluation, the final listening test interface is ready.
The listening test format is a double-blind compare and capture i.e. a listener will compare two versions of the same track for loudness, and will set the volume for one version.

This will be done for 10 tracks, some of which are the same.
The tracks will vary in genre, because loudness perception is reportedly so genre dependent.
Although, I believe the dependence is really in the data (tracks) and not in their associated labels.
The distorted tracks will be the ones that listeners change the level of.

Each track will last 30 seconds, and be of the same sampling rate.
This is to keep even comparison and quality in the measurements later on, and to keep the listening windows short so more accurate comparisons in level can be drawn.

Each track will be peak normalized to -10dBFS.
This is to make 'like' comparisons, and reduce any extra distorted caused by DSP due to numbers going beyond the registers size.

The order of tracks will be randomised, to ensure that its not possible to cheat the test by asking someone else what levels they set.

The track volume for the distorted version, will be offset by 0.5, and then modulated with a 0 - 1 slider. This should an an appropriate amount of level variety available to the listeners, without adding too great a range.

The listeners name, age and listening experience will be recorded, as well as the levels set for each track.

There will be another test format, which uses one track.This track will be modulated 4 times using 4 different NLDs. The slider will be present to change the envelope, and the listener will aim for the loudest and clearest response. The point in time and NLD modulation coefficient will be recorded for each listener.