Atomic Synchronator => TicTacSync

So the gizmo can be used on cameras with an USB mic input (drones, cellphones, action cams).

For those interested, I'm posting more frequent updates on my mastodon account (than here). They are tagged:

https://mamot.fr/tags/atomicsynchronator

It's been a while!

The Timeline object detects audio recordings time coincidences and sync-merged  them  to corresponding videos:

Next step: processing multi-files recordings (there are recognized in but not merged yet).

The project has it own domain name.

Before merging any audio to a video (or to a reference audio, called main sound), any track will be dedrifted using pysox tempo transform if the detected clock drifts result in a delay longer than 5 ms for sound tracks merged together or 10 ms for merged audio and video.

Pushing last updates to Source Hut

Using Adafruit Feather boards.

The prototyping area of the Feather M0 is handy for building a voltage reference (aka virtual ground) around a LM358:

I know there is a DC blocking capacitor built in the recorder audio input stage (or yet a DC-servo circuit to track the signal mean over time): I did feed the 0-3V3 directly into it (hence a signal with a 1.65V DC offset) but it resulted in ringing and more importantly in a lag of almost 500 μs ! I'll try the same measurements with an onboard cap to see if it makes any difference. I'll post data latter.

There's even a pypi package for my dualsoundsync script !

Repositories are here:

• for postprocessing: dualsoundsync on source hut
• for flashing your own atomicsynchronator: ppssyncYears.ino

How bad is my code?

• It is not commented yet
• test coverage is null, for now

at least

• it doesn't crash
• it works (syncing dual system sound recordings)
• it doesn't use print() for logging

to do (software side, for dualsoundsync ):

• comments and tests
• optional logging
• implement syncing of videos with intermittent audio recordings
• implement syncing of audio with intermittent video recordings

in the long run, build a standalone GUI program (with Qt?)