diff --git a/content/notes/wwdc23/10083.md b/content/notes/wwdc23/10083.md
new file mode 100644
index 00000000..460b851b
--- /dev/null
+++ b/content/notes/wwdc23/10083.md
@@ -0,0 +1,71 @@
+---
+contributors: halmueller
+---
+
+# Chapters
+[00:00 - Introduction](https://developer.apple.com/videos/play/wwdc2023/10083/?time=0)
+[01:15 - Project setup](https://developer.apple.com/videos/play/wwdc2023/10083/?time=75)
+[02:47 - UI navigation](https://developer.apple.com/videos/play/wwdc2023/10083/?time=167)
+[04:08 - Composing scenes](https://developer.apple.com/videos/play/wwdc2023/10083/?time=248)
+[07:08 - Particle emitters](https://developer.apple.com/videos/play/wwdc2023/10083/?time=428)
+[13:23 - Audio authoring](https://developer.apple.com/videos/play/wwdc2023/10083/?time=803)
+[17:39 - Statistics](https://developer.apple.com/videos/play/wwdc2023/10083/?time=1059)
+[19:26 - On-device preview](https://developer.apple.com/videos/play/wwdc2023/10083/?time=1166)
+[19:59 - Wrap-up ](https://developer.apple.com/videos/play/wwdc2023/10083/?time=1199)
+
+Session is a walkthrough of Reality Composer Pro, using [Diorama sample app](https://developer.apple.com/documentation/visionos/diorama).
+
+Can launch RCP directly from Xcode->Developer Tools menu.
+Or can create a RCP project by creating a new Xcode xrOS project, which creates a Reality Composer Pro Package.
+
+# Reality Composer Pro UI navigation:
+- 3D viewport (center): navigate with WASD and arrow keys, or with a paired game controller.
+- Hierarchy panel (left) for object selection and reorganizaation.
+- Inspector panel (right): edit properties of selected objects. "Add component" button at bottom shows available built-in objects.
+- Editor panel (bottom): Project browser, Shader Graph, Audio Mixer, Statistics.
+
+3 ways to add assets:
+- Import button in project browser: import existing assets (USDZ, wav, more)
+- Content library ("+" button at top right): curated assets (USDZ, materials, more) from Apple.
+- Object Capture. See ["Meet Object Capture for iOS" session](https://developer.apple.com/videos/play/wwdc2023/10191/).
+
+[05:03: Walkthrough of building diorama from imported assets, plus library assets.](https://developer.apple.com/videos/play/wwdc2023/10083/?time=303)
+
+Imported assets can be replaced with new version, e.g. change the style of _all_ location pins by updating one file.
+
+# Particle emitters
+
+Demo: Clouds composition. Add article emitters (freestanding asset, or attach to an existing asset).
+
+Build a Cloud Chunk. Particle Emitter 
+tinkering, starting with the "Impact" particle emitter preset.
+Change 3D viewport background color. Live playback (top of inspector panel). Large number of particles slows performance.
+Check "isLocalSpace" so that parent's translation/rotation/scaling will also apply to the emitter.
+
+New scene, Cloud A. Add Cloud Chunk multiple times, positioned for realism.
+
+Back to diorama. Add group Clouds, which has Cloud A, Cloud B, Cloud C. Preview just the "Clouds" group with Playback.
+
+# Audio authoring
+
+Audio files. Can be played on one or more objects. An object can play one or multiple audio files.
+
+Audio sources: spatial (comes from a particular object), ambient (e.g. wind from the east, no matter how far east you travel), channel (background music).
+
+Example: animated bird (USDZ), with two bird call audio files attached as Spatial audio source. Audio File Group randomly selects one of its members to play back.
+Preview: playback of animation and audio of all birds and calls in scene. Additional work needed to control from Swift; see [Work with Reality Composer Pro content in 
+Xcode](https://developer.apple.com/videos/play/wwdc2023/10202/).
+
+# Statistics
+
+For performance optimization.
+
+Note that diorama base has many more triangles than the terrain itself. Replace base asset with much simpler version. Reduces triangle count by over half.
+
+# On-device preview
+
+Drop-down at upper right, select actual device. Object appears in AR, can pinch, drag, zoom the scene.
+
+# Wrap-up
+- [Explore materials in Reality Composer Pro (Shader Graph details)](https://developer.apple.com/videos/play/wwdc2023/10202/)
+- [Work with Reality Composer Pro content in Xcode (make scene interactive)](https://developer.apple.com/videos/play/wwdc2023/10273/)