open recorder
loop:
timestamp1 <- getclock()
play audio file
keep listening to input frames until detecting audio file signature
timestamp2 <- getclock()
sample := timestamp2 - timestamp1
open recorder
play audio file
loop:
keep listening to input frames for 1-2 seconds
# analyze captured file
look for 2x consecutive appearances of the original audio file
sample := timestamp2 - timestamp1
* I find interesting that you are getting better correlations when you add a well-known noise burst instead of a less chaotic signal (e.g. a tone or a chirp). In retrospect, it makes sense
* for the uplink/downlink breakup, I see in the Usage.md file in oboetester that you're isolating the downlink measurement with the tap-to-tone experiment. For this experiment, the doc suggests to use (a) the jack to avoid the speaker processing extra latency, and (b) a USB-MIDI input device to replace the touch screen latency (15-30 ms).
2 questions here:
* Q1: I assume that, if instead of the jack, you use a usb-c audio adapter accessory mode, there should be no extra latency either, right? (I'm using late pixel phones)
* Q2: which device are you using for the USB-MIDI input?
Thanks again!
edit: s/markdown/formatdoc/g