Since audio quality is somewhat subjective, we decided to draft some rules in order to limit the influence of personal opinions as much as possible:
  1. Blind test are always reccomended in order to prevent any possible interference - also of psychological and aptitudinal nature - regarding equipment tested;
  2. Audio tests must be performed by experts/artists/enthusiasts in a collective way, but it's always advisable to involve and take in consideration "common listener" opinions too;
  3. Conductors' opinions should not influence the final judgement;
  4. On-the-fly sample rate changing (upsampling) is not recommended, but *must* be quadratic (X2 or X4) if applied;
  5. ...