Topic: Components of Round-Trip-Latency
I'm trying to understand what make up real-world latency ...
I measured RTL on my Babyface Pro FS with 44.1kHz, 48 samples using Reaper using a click track and connecting AN 2 Out to AN 2 In with an XLR cable. Reaper's "Use audio driver reported latency" option was turned off. The results ...
... indicate 152 samples of latency, which seems low.
However, when I turn on Reaper's automatic recording latency compensation, which is based on what the interface reports, the results are precise (the third track of four in the above image).
My Buffer Size is set at 48 samples, plus a 32-sample Safety Buffer (Babyface Pro FS Manual dated 22Sep2020, page 82), plus the 5 (AD) and 7 (DA) sample "converter latency" reported in the (awesome) spreadsheet available at https://www.tonstudio-forum.de/index.ph … -04b-xlsx.
For round trip, this should be (48+32) x 2 + 5 + 7 = 172 samples. I measured 152 samples.
OK ... faster is better, but I'm trying to understand why ...
Could you tell me where did I go wrong?
Is converter latency (reported in the XLS) over and above the buffer and safety buffer latencies?