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Originally Posted by figgebass  Ok...I tested the SSL-rig and my old Protools mix system by going analogue out and back in again.
The difference between the new and original files were just below 2.0ms on the ssl and just above 2 ms on the protools.
However when I was playing bass through both systems it was obvious that the ssl was slower (yeas, I am extremely sensitive towards latency or deviations from linearity of tempo etc , ok? ;-)) than the protools rig.
I then played the originalfile, on the ssl, out analogue 1 and back in analogue input 2, recorded on that track and routed it out analogue 2 into analogue in 3 and recorded that track at the same time. Now the difference between the original and track 2 was still 2 ms but between track 2 and 3 it was 5.3 ms....now how is that?...
On my protools rig it was 2.0x between original and track 2 and 2.0x between 2 and 3 and onwards...
My translation of that is that 3.4 ish ms were added by logic because when it was recording material that wasn't buffered (which is the case of the playback of track 1 but not the "play through" on track 2 while recording) it took some more time.
Hence 5.3 ms being the more accurate calculation of the actual latency of my fingers hitting the strings to the sound coming back out of the speakers....
So..anyway....yes the ssl's roundtrip latency was 2ms to , in and out of analogue, and back from the alpha link ....
Tomorrow I will perform the same test on the symphony rig. Since I can feel that the latency on it is worse than the , brand new I must add, Madi extreme-Alpha Link I would be surprised if the numbers showed me anything else... |
While this is all interesting (and somewhat curious) it isn't a realistic test if what you're trying to determine is the latency in the headphones when monitoring (which is all that really matters, IMHO.) There's too many other variables cluttering the picture. One could test that look with an O-scope, or feed the original signal and the looped signal into two channels on a separate recording rig and see how those tracks relate to one another.