Reply from DPA, this doesn't look useful for me for four channel, unless with FOUR d:vices and phones:
"... we are using one of the audio inputs to feed the SMPTE timecode into the recording while leaving the other track free for a microphone input.
Tentacle has a small software (free) which erases the timecode track and leaves you with the file type you prefer and with the timecode embedded into the file.
It takes only a few seconds in the post situation to accomplish this.
Please visit the homepage of this timecode generator company:
https://www.tentaclesync.com/The cable to be used for this purpose needs to be set up correctly and I can’t recommend to experience with other timecode generator brands without consulting the schematics of such types as we are sending out a DC (5V) on the MicroDot connectors.
Also we are using a “sense” mechanism to determine whether one or two inputs are active.
The set-up is very nice when you are doing work with multicam (on iOS) or mixed environment camera set-ups as the Tentacle units can be jam synced to other kind of gear (like an ENG camera, DSLR or whatever).
Other means of multicam recordings/productions can be made “on the fly” with for example the Filmic pro App and their corresponding Filmic Remote, where you can control several iOS units from a “master” iOS unit or even an Apple watch.
You can then make sure you are ending up with fx 3 files that have been started/stopped at the same time and with the same metadata.
For sound purposes only the Apogee App handles a similar recording."
On the other hand, I ran a quick and unexpected positive test of an Android bitbucket. I just upgraded to a Samsung Galaxy Tab S3 with Android 7, and used the app which Chrysler suggested to me above, USB Audio Recorder Pro, which has just been upgraded to support Android 7. A quick test showed recording at 24/96 successful, with all the high frequencies present in an iZotope scan. So maybe the new Sony phone will work with the MMA-A?
Jeff