THG TIM 2015, Technical Manual

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TIM 2015 Technical Manual v1 (February 2018) Page 41
second. This time I played 11:28 and 50 seconds.
So there you have it. It took 1.93 seconds longer to play a full sequence in folder 20 on one of the passes. When we’re
only talking 10 seconds here, that is a heck of a long time.
This experiment was conducted using Debian8, and a PERL script I cobbled together with help from t’Internet, a
CH341 serial USB -TTL device, a bridge board (that I knocked up to provide power and connexion points) and
finally the Catalex.
The timing calculation was made by saving the current time immediately after the command to play the track was
sent, then subtracting that time from current time the moment the first byte was received back from the Catalex. To
prevent the processor from spiralling out of control in an endless loop, I put a delay of 10,000 micro seconds in
between each check of the input buffer so this could be subtracted.
Timing report Catalex : Full Sequence freshly formatted to FAT16 (B)
1st run Sequence 2nd run Sequence Extra time Extra time
Folder 1 Track 80 : 3.066857815 3.060096025
Folder 1 Track 80 : 3.049524069 3.048336983
Folder 1 Track 9 : 3.150367022 3.149287939
Folder 1 Track 128 : 1.3671 1.357398987
Folder 1 Track 250 : 2.065809965 9.63280106 2.065979958 9.621003866 0 0
Folder 5 Track 80 : 3.242493153 3.250827789
Folder 5 Track 80 : 3.149612188 3.159179926
Folder 5 Track 9 : 3.341564178 3.361958027
Folder 5 Track 128 : 1.448503971 1.458629847
Folder 5 Track 250 : 2.177393913 10.1170743 2.177531958 10.15729976 0.47052 0.492088
Folder 10 Track 80 : 3.291043997 3.30148077
Folder 10 Track 80 : 3.230140924 3.240552902
Folder 10 Track 9 : 3.504113913 3.503427029
Folder 10 Track 128 : 1.539644957 1.529073
Folder 10 Track 250 : 2.237846136 10.5117459 2.249000072 10.522053 0.865192 0.856841
Folder 15 Track 80 : 3.473417997 3.473144054
Folder 15 Track 80 : 3.351972103 3.362617016