Copy edit async buffer queueing documentation

PiperOrigin-RevId: 436176051

docs/customization.md

@@ -209,18 +209,15 @@ described for customizing extractor flags above.
 
 ### Enabling asynchronous buffer queueing ###
 
-Asynchronous buffer queueing is an enhancement in ExoPlayer's rendering pipeline
-that improves dropped frames and audio underruns. With asynchronous buffer
-queueing, the player is operating the platform's `MediaCodec` in [asynchronous
-mode][], thus the feature is applicable when content is decoded using the
-platform decoders. The player also utilizes additional threads for scheduling
-decoding and rendering of data.
-
-The feature is enabled by default on devices with Android 12 onwards and you can
-also enable it in your app for other devices too. For example, consider enabling
-asynchronous buffer queueing if you observe dropped frames or audio underruns on
-specific devices, particularly with Widevine-protected or high frame-rate
-content.
+Asynchronous buffer queueing is an enhancement in ExoPlayer's rendering
+pipeline, which operates `MediaCodec` instances in [asynchronous mode][] and
+uses additional threads to schedule decoding and rendering of data. Enabling it
+can reduce dropped frames and audio underruns.
+
+Asynchronous buffer queueing is enabled by default on devices running Android 12
+and above, and can be enabled manually from Android 6. Consider enabling the
+feature for specific devices on which you observe dropped frames or audio
+underruns, particularly when playing DRM protected or high frame rate content.
 
 In the simplest case, you need to inject a `DefaultRenderersFactory` to the
 player as follows:
@@ -233,10 +230,9 @@ ExoPlayer exoPlayer = new ExoPlayer.Builder(context, renderersFactory).build();
 ~~~
 {: .language-java}
 
-If however in your app you are instantiating the player with custom renderers,
-then make sure to create the `MediaCodecVideoRenderer` and
-`MediaCodecAudioRenderer` instances passing an
-`AsynchronousMediaCodecAdapter.Factory` to their constructor.
+If you're instantiating renderers directly, pass a
+`AsynchronousMediaCodecAdapter.Factory` to the `MediaCodecVideoRenderer` and
+`MediaCodecAudioRenderer` constructors.
 
 ## MediaSource customization ##
 

docs/drm.md

@@ -101,9 +101,9 @@ MediaSource.Factory mediaSourceFactory =
 
 ### Improving playback performance ###
 
-If you're experiencing video stuttering (dropped frames and/or audio underruns)
-with Widevide-protected content on a device with Android version prior to 12,
-you can try [enabling asynchronous buffer queueing].
+If you're experiencing video stuttering on a device running Android 6 to 11 when
+playing DRM protected content, you can try [enabling asynchronous buffer
+queueing].
 
 [main demo app]: {{ site.release_v2 }}/demos/main
 [`MediaDrm`]: {{ site.android_sdk }}/android/media/MediaDrm.html

docs/troubleshooting.md

@@ -296,13 +296,12 @@ is the official way to play YouTube videos on Android.
 
 #### Video playback is stuttering ###
 
-The device on which you're observing this may not be able to decode the content
-fast enough if, for example, the content bitrate or resolution exceeds the
-device capabilities. You may need to use lower quality content to obtain good
-performance on such devices.
+The device may not be able to decode the content fast enough if, for example,
+the content bitrate or resolution exceeds the device capabilities. You may need
+to use lower quality content to obtain good performance on such devices.
 
-If you're experiencing this on a device with Android version prior to 12,
-particularly with Widevine-protected or high frame-rate content, you can try
+If you're experiencing video stuttering on a device running Android 6 to 11,
+particularly when playing DRM protected or high frame rate content, you can try
 [enabling asynchronous buffer queueing].
 
 [Fixing "Cleartext HTTP traffic not permitted" errors]: #fixing-cleartext-http-traffic-not-permitted-errors