diff --git a/core/src/avm2/globals/flash/media/soundchannel.rs b/core/src/avm2/globals/flash/media/soundchannel.rs
index c94607816..e449b3fe6 100644
--- a/core/src/avm2/globals/flash/media/soundchannel.rs
+++ b/core/src/avm2/globals/flash/media/soundchannel.rs
@@ -2,7 +2,7 @@
 
 use crate::avm2::activation::Activation;
 use crate::avm2::class::{Class, ClassAttributes};
-use crate::avm2::method::Method;
+use crate::avm2::method::{Method, NativeMethodImpl};
 use crate::avm2::names::{Namespace, QName};
 use crate::avm2::object::{soundchannel_allocator, Object};
 use crate::avm2::value::Value;
@@ -31,6 +31,24 @@ pub fn class_init<'gc>(
     Ok(Value::Undefined)
 }
 
+/// Stub `SoundChannel.leftPeak`
+pub fn left_peak<'gc>(
+    _activation: &mut Activation<'_, 'gc, '_>,
+    _this: Option<Object<'gc>>,
+    _args: &[Value<'gc>],
+) -> Result<Value<'gc>, Error> {
+    Err("Sound.leftPeak is a stub.".into())
+}
+
+/// Stub `SoundChannel.rightPeak`
+pub fn right_peak<'gc>(
+    _activation: &mut Activation<'_, 'gc, '_>,
+    _this: Option<Object<'gc>>,
+    _args: &[Value<'gc>],
+) -> Result<Value<'gc>, Error> {
+    Err("Sound.rightPeak is a stub.".into())
+}
+
 /// Construct `SoundChannel`'s class.
 pub fn create_class<'gc>(mc: MutationContext<'gc, '_>) -> GcCell<'gc, Class<'gc>> {
     let class = Class::new(
@@ -46,5 +64,15 @@ pub fn create_class<'gc>(mc: MutationContext<'gc, '_>) -> GcCell<'gc, Class<'gc>
     write.set_attributes(ClassAttributes::SEALED | ClassAttributes::FINAL);
     write.set_instance_allocator(soundchannel_allocator);
 
+    const PUBLIC_INSTANCE_PROPERTIES: &[(
+        &str,
+        Option<NativeMethodImpl>,
+        Option<NativeMethodImpl>,
+    )] = &[
+        ("leftPeak", Some(left_peak), None),
+        ("rightPeak", Some(right_peak), None),
+    ];
+    write.define_public_builtin_instance_properties(mc, PUBLIC_INSTANCE_PROPERTIES);
+
     class
 }