Since I was the person with two errors, I would say that I listened so much that I got tired of the sound. It is not easy to conduct an A-B test, I would have preferred an ABX test so that I could have compared the sound more easily. The faulty errors could have been due to mistakes.

I was neither familiar with the equipment, the drum recording or the sound of the CD player before the test. The other two persons work at this studio, and they have this CD player there as a transport for a DAC. So they have listened much more to this CD player than me.

The cables in the system is 4x.15 mm2 EKK solid core copper, I believe. The interconnects are RG62 or similar low-capacitance cable.

Speaking of difference, numerous tests have been made which showed that very sharp transients (like hitting on the "border" of the drum) is very revealing. Also electronic music with low bass content (≈10 Hz).

We tested several music CDs before we chose the specific drum section. The very big task before every test is to listen and find the part which is most revealing. Complex music should be "music difficult to reproduce by the equipment" which often turns out to be very dynamic, sharp transients and low bass content.

Thomas