A MIC testing tool to check what audio sources and channels are supported by device. I created this app after One Plus 3T phone call audio became garbage. This helped my figure out which side of mic acted as LEFT OR RIGHT. Example It helped to know bottom mic is NOT always RIGHT channel in stereo. There are multiple mic in a device. A mic near camera or top of phone and a mic at bottom. Generally Top MIC acts as left. Any of these mic can get issues and we need to check which one has issue.

NOTE:
This app does supports external MIC but its not made with intention to support them. Kindly don't rate it on basic of external mic. There might be other apps for this purpose.



TESTS:

- TEST PHONE CALL MIC: Select source MIC and channels MONO then start MIC. Blow air at bottom of phone. Some devices may also use more than 1 mics for filtering purposes.

- TEST STEREO: Select source CAMCORDER, channels STEREO then start mic. Blow air at bottom of phone and on rear camera. Check which channel has longer bar. This can help identify which mic is being used as LEFT RIGHT. This also tests sensitivity of MICs.

- Left = MIC1 and right = MIC2 are not guaranteed. It depends upon device maker. Sometimes left can be MIC2 and right can be MIC1. This can be tested by comparing MIC+STEREO and CAMCORDER+STEREO settings.



SIGNS OF BAD MIC:

- If there in no loud sound yet MIC meters bars go to red.

- If there is loud sound but MIC meter bars don't increase.

- Test actual audio. Record a video from OEM camera app (app made by company) and hear audios. Many companies use proprietary technologies which only work in their own apps. Do this before making conclusions just by using this or other apps. This app uses standard Android features.



INFO:

- Many devices record MONO from their audio recorder but STEREO from camera app. Example One Plus 3T.

- Some devices FORCE MONO to all 3rd party apps but record STEREO, 3D etc from their own camera app. Example Nokia 8.1 etc are not MONO by hardware. OZO audio may sound mono from 3rd party mic apps.