ProTools HD system w/192 main ch/pre send out thru a buss to an aux is 6 samples main ch/pre send out thru a buss, recorded on a track is 10 samples post send out to a buss, to an aux is 10 samples post send out thru a buss, recorded on a track is 14 samples main ch/pre send out thru an analog output, return thru an analog input, to an aux is 99 samples main ch/pre send out thru an analog output, return thru an analog input, recorded on a track is 103 samples post send to an analog output, return thru an analog input, to an aux is 103 samples post send to an analog output, return thru an analog input, recorded on a track is 107 samples main ch/pre send out thru the enclosed AES output, return thru enclosed AES input, to an aux is 17 samples main ch/pre send out thru the regular AES output, return thru the regular AES input, to an aux is 20 samples conclusion: buss to aux is 6 samples post send adds 4 samples recording on a track adds 4 samples analog loop is 99 samples enclosed AES loop is 17 samples regular AES loop is 20 samples