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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..d239a65
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "aproc"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+cpal = "0.14.1"
\ No newline at end of file
diff --git a/readme.md b/readme.md
new file mode 100644
index 0000000..2edfb8b
--- /dev/null
+++ b/readme.md
@@ -0,0 +1,3 @@
+# aproc
+
+Audio processing tests
\ No newline at end of file
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..799496b
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,37 @@
+use cpal::traits::HostTrait;
+use cpal::traits::DeviceTrait;
+use cpal::traits::StreamTrait;
+
+fn main() {
+    let host = cpal::default_host();
+    let dev = host.default_output_device().expect("no audio device found");
+    
+    let cfg: cpal::StreamConfig = dev.supported_output_configs()
+        .expect("couldn't find configs")
+        .next()
+        .expect("bogus device")
+        .with_max_sample_rate().into();
+    
+    println!("sample rate {:?}", &cfg.sample_rate);
+    
+    let mut i: f32 = 0.0;
+    
+    let stream = dev.build_output_stream(
+        &cfg,
+        move |data: &mut [f32], _: &cpal::OutputCallbackInfo| {
+            println!("{}", &data.len());
+            for sample in data.iter_mut() {
+                *sample = cpal::Sample::from(&(i/384000.0*2.0*3.141592 * 340.0).sin());
+                i += 1.0;
+            }
+        },
+        move |err| {
+            println!("err: {}", err);
+        }
+    ).expect("could not build stream");
+    
+    stream.play().unwrap();
+
+    loop {}
+    println!("Hello, world!");
+}