From a1a90ae4f8f6d1573fcce2322a1401246b0025c4 Mon Sep 17 00:00:00 2001
From: tolelom <98kimsungmin@naver.com>
Date: Wed, 25 Mar 2026 11:11:55 +0900
Subject: [PATCH] feat(audio): add audio_demo example with sine wave playback

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
---
 Cargo.toml                      |  1 +
 examples/audio_demo/Cargo.toml  |  7 ++++++
 examples/audio_demo/src/main.rs | 38 +++++++++++++++++++++++++++++++++
 3 files changed, 46 insertions(+)
 create mode 100644 examples/audio_demo/Cargo.toml
 create mode 100644 examples/audio_demo/src/main.rs

diff --git a/Cargo.toml b/Cargo.toml
index b59c19d..434ed69 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -17,6 +17,7 @@ members = [
     "examples/ibl_demo",
     "crates/voltex_physics",
     "crates/voltex_audio",
+    "examples/audio_demo",
 ]
 
 [workspace.dependencies]
diff --git a/examples/audio_demo/Cargo.toml b/examples/audio_demo/Cargo.toml
new file mode 100644
index 0000000..14fa21f
--- /dev/null
+++ b/examples/audio_demo/Cargo.toml
@@ -0,0 +1,7 @@
+[package]
+name = "audio_demo"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+voltex_audio.workspace = true
diff --git a/examples/audio_demo/src/main.rs b/examples/audio_demo/src/main.rs
new file mode 100644
index 0000000..764e2a8
--- /dev/null
+++ b/examples/audio_demo/src/main.rs
@@ -0,0 +1,38 @@
+use voltex_audio::{AudioClip, AudioSystem};
+
+fn generate_sine_clip(freq: f32, duration: f32, sample_rate: u32) -> AudioClip {
+    let num_samples = (sample_rate as f32 * duration) as usize;
+    let mut samples = Vec::with_capacity(num_samples);
+    for i in 0..num_samples {
+        let t = i as f32 / sample_rate as f32;
+        samples.push((t * freq * 2.0 * std::f32::consts::PI).sin() * 0.3);
+    }
+    AudioClip::new(samples, sample_rate, 1)
+}
+
+fn main() {
+    println!("=== Voltex Audio Demo ===");
+    println!("Generating 440Hz sine wave (2 seconds)...");
+
+    let clip = generate_sine_clip(440.0, 2.0, 44100);
+    let clip2 = generate_sine_clip(660.0, 1.5, 44100);
+
+    println!("Initializing audio system...");
+    let audio = match AudioSystem::new(vec![clip, clip2]) {
+        Ok(a) => a,
+        Err(e) => {
+            eprintln!("Failed to init audio: {}", e);
+            return;
+        }
+    };
+
+    println!("Playing 440Hz tone...");
+    audio.play(0, 0.5, false);
+    std::thread::sleep(std::time::Duration::from_secs(1));
+
+    println!("Playing 660Hz tone on top...");
+    audio.play(1, 0.3, false);
+    std::thread::sleep(std::time::Duration::from_secs(2));
+
+    println!("Done!");
+}