# 2-channel recording appears as 1 duplicated channel on only some Android devices

**URL:** <https://forum.juce.com/t/2-channel-recording-appears-as-1-duplicated-channel-on-only-some-android-devices/31630>\
**Category:** Android\
**Created:** [February 5, 2019, 8:01pm UTC](https://forum.juce.com/t/2-channel-recording-appears-as-1-duplicated-channel-on-only-some-android-devices/31630 "2019-02-05T20:01:35Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![jemur](https://avatars.discourse-cdn.com/v4/letter/j/da6949/32.png) [@jemur](https://forum.juce.com/u/jemur)\
**Post date:** [February 5, 2019, 8:01pm UTC](https://forum.juce.com/t/2-channel-recording-appears-as-1-duplicated-channel-on-only-some-android-devices/31630/1 "2019-02-05T20:01:35Z")

</div>

I have a multi-channel recording app which works great on the following android devices:

- Pixel 2
- HTC U11
- LG v20
- Samsung Galaxy A5
- Samsung Galaxy S7

However, on the following two devices, I can detect two channels, but channel 1 is simply duplicated on channel 2, and the real content of channel 2 is lost:

- Samsung Tab S4
- Samsung Note 9

I have successfully recorded two channels of audio using a different multi-channel (presumably non-JUCE) app on these devices (using the n-Track app). I’m baffled as to the source of this problem.

Any ideas?

---

<div class="post-metadata">

**Author:** ![t0m](https://sea2.discourse-cdn.com/flex026/user_avatar/forum.juce.com/t0m/32/16413_2.png) [@t0m](https://forum.juce.com/u/t0m)\
**Post date:** [February 11, 2019, 12:09pm UTC](https://forum.juce.com/t/2-channel-recording-appears-as-1-duplicated-channel-on-only-some-android-devices/31630/2 "2019-02-11T12:09:56Z")

</div>

Unfortunately we don’t have either of those two devices to test on, so it’s hard to guess-debug what’s going on…

---

<div class="post-metadata">

**Author:** ![donturner1](https://sea2.discourse-cdn.com/flex026/user_avatar/forum.juce.com/donturner1/32/4411_2.png) [@donturner1](https://forum.juce.com/u/donturner1)\
**Post date:** [May 20, 2019, 3:47pm UTC](https://forum.juce.com/t/2-channel-recording-appears-as-1-duplicated-channel-on-only-some-android-devices/31630/3 "2019-05-20T15:47:58Z")

</div>

Just to let you know this looks like an issue with those particular devices. You’re not the only one experiencing it: [https://stackoverflow.com/questions/55979907/how-to-read-data-from-multiple-microphones-using-androids-oboe-aaudio/56224282#56224282](https://stackoverflow.com/questions/55979907/how-to-read-data-from-multiple-microphones-using-androids-oboe-aaudio/56224282#56224282)