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diff --git a/doc/arecord_opi_lite.md b/doc/arecord_opi_lite.md
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-In order to use microphone on **Orange Pi Lite**:
-- enable audio codec in `armbian-config`
-- put this to `/etc/rc.local` (and make it executable):
-  ```
-  for v in unmute cap; do
-      /usr/bin/amixer set "Line In" $v
-      /usr/bin/amixer set "Mic1" $v
-  done
-  
-  for k in "Mic1 Boost" "Line In" "Mic1"; do
-      /usr/bin/amixer set "$k" "86%"
-  done
-  ```
-\ No newline at end of file