A while back I did a series of crude tests on Analog audio cables. I am considering a set of tests on Toslink optical cables and am petitioning opinions on my protocol. Equipment ---------- Western Digital HDTV optical output or Marantz CC4300 CD player optical output Edirol UA-1EX USB card with optical (Mini-Toslink) digital in Toslink cables ------------- Freebies and current cheapies Monoprice basic Monoprice premium Two $50 - $60 Toslink cables (I'll buy these) Toslink to Mini-Toslink adaptor Lenovo Y710 Ideapad 4GB RAM, Windows Vista 32 bit Audacity 1.2.4 recording software Source files ----------- CD or WAV files Method ------- With each cable : same process. Record a 1 minute segment from the same track/tracks as a digital recording at 16/44.1 at digital max recording level, record a 2nd sample of the same 1 minute , trim and align so that sample 1 and sample 2 are the same length and time-aligned, repeat for samples 3 thru 10. Analyze the frequency response for all 10 samples 1024 or 2048 FFT. Import the data into Excel, average the results. Plot the differences between each cables data points. Choose a sample from each set with the *least* deviation from the mean, uses these as DBT samples, post here for members to DBT. Suggestions ?