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A demonstration how to connect USB interface with professional microphone and guitar/bass to record high-quality video&audio to Android smartphones using OpenCamera app (freeware).
Connect smartphone to audio interface, using compatible cable - in this example, I used its standard audio interfaces USB cable and a converter, USB A - USB C adapter.
To directly connect USB interface to Android mobile phone, use USB B (male) to USB C (male) cable or any cable compatible both with your interface and smartphone.
If your smartphone have input connector different than USB C, find a cable accordingly - same as with audio interface (some uses USB mini or USB micro connector, or USB C).
When connected, audio interface will power on.
As some interfaces are USB-powered only, it will drain your smartphone - your mileage may vary from as low as 15 minutes to hour or more.
Check Video Settings in OpenCamera app, set Audio source to DEFAULT and Audio Channels to MONO or STEREO (see the "Note" below)
Connect dynamic microphone, instrument or external audio device to audio interface and check input levels.
Using a condenser microphone without using external phantom power (48V) source may not work or will drain the cell phone battery very quickly.
And finally - press RECORD and... play!
Note: as USB interfaces record separate L/R channels - as can be seen in this example, vocal is in left and bass in right channel - so Open Camera can optionally record mono audio, making such two-separated-channel audio more listening-friendly.
Choose recording mode in OpenCamera settings (Video settings - Audio Channels - Mono/Stereo)
Process:
- install OpenCamera app
- open app:
* set Video Settings - Audio Source - DEFAULT.
* set Audio Channels to MONO or STEREO (see the "Note" above)
- connect USB audio interface to a phone (via adapter or directly via compatible cable)
- connect audio sources to audio inteface - microphones, guitars, instruments, processors, mixer, etc...
- press Record
Equipment used:
* Sony Xperia XZ Premium (Android 9.0)
* Behringer U-Phoria UMC204HD
* USB-A to USB-C adapter
* OpenCamera app (Google Play: play.google.co....
mic: Sennheiser e845s
bass: Aria Pro II SB-1000 (MIJ 1983)