diff --git a/.travis.yml b/.travis.yml
index 27d5f0e88..e2c80ecd9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -13,6 +13,8 @@ env:
   - LD_LIBRARY_PATH: /usr/local/lib
   global:
   - secure: URNNlOqxnfwWDC/w4PDTCswqe9ccnkIqDwfQecppfEui4KhpYXfrG9gx3xupWzWMfX+NPEcXtiyWA4CuUYaHbWWINLeLQUk650AFEqaRSiTpeh45Y9nh3dHT4fFDz4OeNfayNBBKL0kx5YwrugoeQggIgnF2KEcIHMF0+BbTtAM=
+install:
+- rustup target add aarch64-apple-ios x86_64-apple-ios
 before_script:
 - rustc --version
 - cargo --version
@@ -20,6 +22,8 @@ script:
 - cargo build --verbose
 - cargo test --verbose
 - cargo doc --verbose
+- cargo build --verbose --target aarch64-apple-ios
+- cargo build --verbose --target x86_64-apple-ios
 after_success: |
   [ $TRAVIS_BRANCH = master ] &&
   [ $TRAVIS_PULL_REQUEST = false ] &&
diff --git a/examples/feedback.rs b/examples/feedback.rs
new file mode 100644
index 000000000..07646dd37
--- /dev/null
+++ b/examples/feedback.rs
@@ -0,0 +1,214 @@
+//! A basic input + output stream example, copying the mic input stream to the default output stream
+
+extern crate coreaudio;
+
+use std::collections::VecDeque;
+use std::mem;
+use std::ptr::null;
+use std::sync::{Arc, Mutex};
+
+use coreaudio::audio_unit::audio_format::LinearPcmFlags;
+use coreaudio::audio_unit::render_callback::{self, data};
+use coreaudio::audio_unit::{AudioUnit, Element, SampleFormat, Scope, StreamFormat};
+use coreaudio::sys::*;
+
+const SAMPLE_RATE: f64 = 44100.0;
+
+type S = f32; const SAMPLE_FORMAT: SampleFormat = SampleFormat::F32;
+// type S = i32; const SAMPLE_FORMAT: SampleFormat = SampleFormat::I32;
+// type S = i16; const SAMPLE_FORMAT: SampleFormat = SampleFormat::I16;
+// type S = i8; const SAMPLE_FORMAT: SampleFormat = SampleFormat::I8;
+
+fn main() -> Result<(), coreaudio::Error> {
+    let mut input_audio_unit = audio_unit_from_device(default_input_device().unwrap(), true)?;
+    let mut output_audio_unit = audio_unit_from_device(default_output_device().unwrap(), false)?;
+
+    let format_flag = match SAMPLE_FORMAT {
+        SampleFormat::F32 => LinearPcmFlags::IS_FLOAT,
+        SampleFormat::I32 | SampleFormat::I16 | SampleFormat::I8 => LinearPcmFlags::IS_SIGNED_INTEGER,
+    };
+
+    // Using IS_NON_INTERLEAVED everywhere because data::Interleaved is commented out / not implemented
+    let in_stream_format = StreamFormat {
+        sample_rate: SAMPLE_RATE,
+        sample_format: SAMPLE_FORMAT,
+        flags: format_flag | LinearPcmFlags::IS_PACKED | LinearPcmFlags::IS_NON_INTERLEAVED,
+        // audio_unit.set_input_callback is hardcoded to 1 buffer, and when using non_interleaved
+        // we are forced to 1 channel
+        channels_per_frame: 1,
+    };
+
+    let out_stream_format = StreamFormat {
+        sample_rate: SAMPLE_RATE,
+        sample_format: SAMPLE_FORMAT,
+        flags: format_flag | LinearPcmFlags::IS_PACKED | LinearPcmFlags::IS_NON_INTERLEAVED,
+        // you can change this to 1
+        channels_per_frame: 2,
+    };
+
+    println!("input={:#?}", &in_stream_format);
+    println!("output={:#?}", &out_stream_format);
+    println!("input_asbd={:#?}", &in_stream_format.to_asbd());
+    println!("output_asbd={:#?}", &out_stream_format.to_asbd());
+
+    let id = kAudioUnitProperty_StreamFormat;
+    let asbd = in_stream_format.to_asbd();
+    input_audio_unit.set_property(id, Scope::Output, Element::Input, Some(&asbd))?;
+
+    let asbd = out_stream_format.to_asbd();
+    output_audio_unit.set_property(id, Scope::Input, Element::Output, Some(&asbd))?;
+
+    let buffer_left = Arc::new(Mutex::new(VecDeque::<S>::new()));
+    let producer_left = buffer_left.clone();
+    let consumer_left = buffer_left.clone();
+    let buffer_right = Arc::new(Mutex::new(VecDeque::<S>::new()));
+    let producer_right = buffer_right.clone();
+    let consumer_right = buffer_right.clone();
+
+    // seed roughly 1 second of data to create a delay in the feedback loop for easier testing
+    for buffer in vec![buffer_left, buffer_right] {
+        let mut buffer = buffer.lock().unwrap();
+        for _ in 0..(out_stream_format.sample_rate as i32) {
+            buffer.push_back(0 as S);
+        }
+    }
+
+    type Args = render_callback::Args<data::NonInterleaved<S>>;
+
+    input_audio_unit.set_input_callback(move |args| {
+        let Args {
+            num_frames,
+            mut data,
+            ..
+        } = args;
+        let buffer_left = producer_left.lock().unwrap();
+        let buffer_right = producer_right.lock().unwrap();
+        let mut buffers = vec![buffer_left, buffer_right];
+        for i in 0..num_frames {
+            for (ch, channel) in data.channels_mut().enumerate() {
+                let value: S = channel[i];
+                buffers[ch].push_back(value);
+            }
+        }
+        Ok(())
+    })?;
+    input_audio_unit.start()?;
+
+    output_audio_unit.set_render_callback(move |args: Args| {
+        let Args {
+            num_frames,
+            mut data,
+            ..
+        } = args;
+
+        let buffer_left = consumer_left.lock().unwrap();
+        let buffer_right = consumer_right.lock().unwrap();
+        let mut buffers = vec![buffer_left, buffer_right];
+        for i in 0..num_frames {
+            // Default other channels to copy value from first channel as a fallback
+            let zero: S = 0 as S;
+            let f: S = *buffers[0].front().unwrap_or(&zero);
+            for (ch, channel) in data.channels_mut().enumerate() {
+                let sample: S = buffers[ch].pop_front().unwrap_or(f);
+                channel[i] = sample;
+            }
+        }
+        Ok(())
+    })?;
+    output_audio_unit.start()?;
+
+    std::thread::sleep(std::time::Duration::from_millis(100000));
+
+    Ok(())
+}
+
+/// Copied from cpal
+pub fn default_input_device() -> Option<AudioDeviceID> {
+    let property_address = AudioObjectPropertyAddress {
+        mSelector: kAudioHardwarePropertyDefaultInputDevice,
+        mScope: kAudioObjectPropertyScopeGlobal,
+        mElement: kAudioObjectPropertyElementMaster,
+    };
+
+    let audio_device_id: AudioDeviceID = 0;
+    let data_size = mem::size_of::<AudioDeviceID>();
+    let status = unsafe {
+        AudioObjectGetPropertyData(
+            kAudioObjectSystemObject,
+            &property_address as *const _,
+            0,
+            null(),
+            &data_size as *const _ as *mut _,
+            &audio_device_id as *const _ as *mut _,
+        )
+    };
+    if status != kAudioHardwareNoError as i32 {
+        return None;
+    }
+
+    Some(audio_device_id)
+}
+
+/// Copied from cpal
+pub fn default_output_device() -> Option<AudioDeviceID> {
+    let property_address = AudioObjectPropertyAddress {
+        mSelector: kAudioHardwarePropertyDefaultOutputDevice,
+        mScope: kAudioObjectPropertyScopeGlobal,
+        mElement: kAudioObjectPropertyElementMaster,
+    };
+
+    let audio_device_id: AudioDeviceID = 0;
+    let data_size = mem::size_of::<AudioDeviceID>();
+    let status = unsafe {
+        AudioObjectGetPropertyData(
+            kAudioObjectSystemObject,
+            &property_address as *const _,
+            0,
+            null(),
+            &data_size as *const _ as *mut _,
+            &audio_device_id as *const _ as *mut _,
+        )
+    };
+    if status != kAudioHardwareNoError as i32 {
+        return None;
+    }
+
+    Some(audio_device_id)
+}
+
+/// Copied from cpal
+fn audio_unit_from_device(
+    device_id: AudioDeviceID,
+    input: bool,
+) -> Result<AudioUnit, coreaudio::Error> {
+    let mut audio_unit = AudioUnit::new(coreaudio::audio_unit::IOType::HalOutput)?;
+
+    if input {
+        // Enable input processing.
+        let enable_input = 1u32;
+        audio_unit.set_property(
+            kAudioOutputUnitProperty_EnableIO,
+            Scope::Input,
+            Element::Input,
+            Some(&enable_input),
+        )?;
+
+        // Disable output processing.
+        let disable_output = 0u32;
+        audio_unit.set_property(
+            kAudioOutputUnitProperty_EnableIO,
+            Scope::Output,
+            Element::Output,
+            Some(&disable_output),
+        )?;
+    }
+
+    audio_unit.set_property(
+        kAudioOutputUnitProperty_CurrentDevice,
+        Scope::Global,
+        Element::Output,
+        Some(&device_id),
+    )?;
+
+    Ok(audio_unit)
+}
diff --git a/examples/ios/Cargo.toml b/examples/ios/Cargo.toml
new file mode 100644
index 000000000..c04bf362d
--- /dev/null
+++ b/examples/ios/Cargo.toml
@@ -0,0 +1,15 @@
+[package]
+name = "coreaudio-ios-example"
+version = "0.1.0"
+authors = ["Michael Hills <mhills@gmail.com>"]
+edition = "2018"
+
+[lib]
+name = "coreaudio_ios_example"
+crate-type = ["staticlib"]
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+coreaudio-rs = { path = "../.." }
+
diff --git a/examples/ios/build_rust_deps.sh b/examples/ios/build_rust_deps.sh
new file mode 100755
index 000000000..aa5ee3134
--- /dev/null
+++ b/examples/ios/build_rust_deps.sh
@@ -0,0 +1,12 @@
+#!/bin/sh
+
+set -e
+
+PATH=$PATH:$HOME/.cargo/bin
+
+# If you want your build to run faster, add a "--targets x86_64-apple-ios" for just using the ios simulator.
+if [ -n ${IOS_TARGETS} ]; then
+    cargo lipo --targets ${IOS_TARGETS}
+else
+    cargo lipo
+fi
diff --git a/examples/ios/coreaudio-ios-example.xcodeproj/project.pbxproj b/examples/ios/coreaudio-ios-example.xcodeproj/project.pbxproj
new file mode 100644
index 000000000..a706f377e
--- /dev/null
+++ b/examples/ios/coreaudio-ios-example.xcodeproj/project.pbxproj
@@ -0,0 +1,429 @@
+// !$*UTF8*$!
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+/* Begin PBXGroup section */
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+			);
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+				GCC_NO_COMMON_BLOCKS = YES;
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+				GCC_PREPROCESSOR_DEFINITIONS = (
+					"DEBUG=1",
+					"$(inherited)",
+				);
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+				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
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+		};
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+				CLANG_CXX_LANGUAGE_STANDARD = "gnu++14";
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+				CLANG_WARN_DOCUMENTATION_COMMENTS = YES;
+				CLANG_WARN_EMPTY_BODY = YES;
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+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
+				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
+				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_QUOTED_INCLUDE_IN_FRAMEWORK_HEADER = YES;
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+				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
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+				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				GCC_C_LANGUAGE_STANDARD = gnu11;
+				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
+				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
+				GCC_WARN_UNDECLARED_SELECTOR = YES;
+				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
+				GCC_WARN_UNUSED_FUNCTION = YES;
+				GCC_WARN_UNUSED_VARIABLE = YES;
+				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
+				MTL_ENABLE_DEBUG_INFO = NO;
+				MTL_FAST_MATH = YES;
+				SDKROOT = iphoneos;
+				VALIDATE_PRODUCT = YES;
+			};
+			name = Release;
+		};
+		57AB5AE4252762C30040DE8C /* Debug */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
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+				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+				);
+				LIBRARY_SEARCH_PATHS = target/universal/debug;
+				OTHER_LDFLAGS = "-lcoreaudio_ios_example";
+				OTHER_LIBTOOLFLAGS = "";
+				PRODUCT_BUNDLE_IDENTIFIER = "coreaudio-rs.coreaudio-ios-example";
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+			name = Debug;
+		};
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+			isa = XCBuildConfiguration;
+			buildSettings = {
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+				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+				);
+				LIBRARY_SEARCH_PATHS = target/universal/release;
+				OTHER_LDFLAGS = "-lcoreaudio_ios_example";
+				OTHER_LIBTOOLFLAGS = "";
+				PRODUCT_BUNDLE_IDENTIFIER = "coreaudio-rs.coreaudio-ios-example";
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				TARGETED_DEVICE_FAMILY = "1,2";
+			};
+			name = Release;
+		};
+		57AB5AEB252766240040DE8C /* Debug */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				CODE_SIGN_STYLE = Automatic;
+				DEBUGGING_SYMBOLS = YES;
+				DEBUG_INFORMATION_FORMAT = dwarf;
+				GCC_GENERATE_DEBUGGING_SYMBOLS = YES;
+				GCC_OPTIMIZATION_LEVEL = 0;
+				OTHER_CFLAGS = "";
+				OTHER_LDFLAGS = "";
+				PRODUCT_NAME = "$(TARGET_NAME)";
+			};
+			name = Debug;
+		};
+		57AB5AEC252766240040DE8C /* Release */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				CODE_SIGN_STYLE = Automatic;
+				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
+				OTHER_CFLAGS = "";
+				OTHER_LDFLAGS = "";
+				PRODUCT_NAME = "$(TARGET_NAME)";
+			};
+			name = Release;
+		};
+/* End XCBuildConfiguration section */
+
+/* Begin XCConfigurationList section */
+		57AB5AC5252762C00040DE8C /* Build configuration list for PBXProject "coreaudio-ios-example" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				57AB5AE1252762C30040DE8C /* Debug */,
+				57AB5AE2252762C30040DE8C /* Release */,
+			);
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+			defaultConfigurationName = Release;
+		};
+		57AB5AE3252762C30040DE8C /* Build configuration list for PBXNativeTarget "coreaudio-ios-example" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				57AB5AE4252762C30040DE8C /* Debug */,
+				57AB5AE5252762C30040DE8C /* Release */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+		57AB5AEA252766240040DE8C /* Build configuration list for PBXLegacyTarget "cargo_ios" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
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+				57AB5AEC252766240040DE8C /* Release */,
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+			defaultConfigurationName = Release;
+		};
+/* End XCConfigurationList section */
+	};
+	rootObject = 57AB5AC2252762C00040DE8C /* Project object */;
+}
diff --git a/examples/ios/coreaudio-ios-example.xcodeproj/project.xcworkspace/contents.xcworkspacedata b/examples/ios/coreaudio-ios-example.xcodeproj/project.xcworkspace/contents.xcworkspacedata
new file mode 100644
index 000000000..919434a62
--- /dev/null
+++ b/examples/ios/coreaudio-ios-example.xcodeproj/project.xcworkspace/contents.xcworkspacedata
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "self:">
+   </FileRef>
+</Workspace>
diff --git a/examples/ios/coreaudio-ios-example.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist b/examples/ios/coreaudio-ios-example.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
new file mode 100644
index 000000000..18d981003
--- /dev/null
+++ b/examples/ios/coreaudio-ios-example.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>
diff --git a/examples/ios/ios-src/AppDelegate.h b/examples/ios/ios-src/AppDelegate.h
new file mode 100644
index 000000000..596b56f03
--- /dev/null
+++ b/examples/ios/ios-src/AppDelegate.h
@@ -0,0 +1,15 @@
+//
+//  AppDelegate.h
+//  coreaudio-ios-example
+//
+//  Created by Michael Hills on 2/10/20.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface AppDelegate : UIResponder <UIApplicationDelegate>
+
+@property (strong, nonatomic) UIWindow *window;
+
+@end
+
diff --git a/examples/ios/ios-src/AppDelegate.m b/examples/ios/ios-src/AppDelegate.m
new file mode 100644
index 000000000..d215a9f4d
--- /dev/null
+++ b/examples/ios/ios-src/AppDelegate.m
@@ -0,0 +1,48 @@
+//
+//  AppDelegate.m
+//  coreaudio-ios-example
+//
+//  Created by Michael Hills on 2/10/20.
+//
+
+#import "AppDelegate.h"
+@import AVFoundation;
+
+void rust_ios_main(void);
+
+
+@interface AppDelegate ()
+
+@end
+
+@implementation AppDelegate
+
+
+
+- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
+    // Override point for customization after application launch.
+    
+    NSError *error;
+    BOOL success;
+    
+    // It is necessary to access the sharedInstance so that calls to AudioSessionGetProperty
+    // will work.
+    AVAudioSession *session = AVAudioSession.sharedInstance;
+    // Setting up the category is not necessary, but generally advised.
+    // Since this demo records and plays, lets use AVAudioSessionCategoryPlayAndRecord.
+    // Also default to speaker as defaulting to the phone earpiece would be unusual.
+    success = [session setCategory:AVAudioSessionCategoryPlayAndRecord
+                       withOptions:AVAudioSessionCategoryOptionDefaultToSpeaker
+                             error:&error];
+
+    if (success) {
+        NSLog(@"Calling rust_ios_main()");
+        rust_ios_main();
+    } else {
+        NSLog(@"Failed to configure audio session category");
+    }
+    
+    return YES;
+}
+
+@end
diff --git a/examples/ios/ios-src/Base.lproj/LaunchScreen.storyboard b/examples/ios/ios-src/Base.lproj/LaunchScreen.storyboard
new file mode 100644
index 000000000..865e9329f
--- /dev/null
+++ b/examples/ios/ios-src/Base.lproj/LaunchScreen.storyboard
@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="13122.16" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="01J-lp-oVM">
+    <dependencies>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="13104.12"/>
+        <capability name="Safe area layout guides" minToolsVersion="9.0"/>
+        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
+    </dependencies>
+    <scenes>
+        <!--View Controller-->
+        <scene sceneID="EHf-IW-A2E">
+            <objects>
+                <viewController id="01J-lp-oVM" sceneMemberID="viewController">
+                    <view key="view" contentMode="scaleToFill" id="Ze5-6b-2t3">
+                        <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
+                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <color key="backgroundColor" xcode11CocoaTouchSystemColor="systemBackgroundColor" cocoaTouchSystemColor="whiteColor"/>
+                        <viewLayoutGuide key="safeArea" id="6Tk-OE-BBY"/>
+                    </view>
+                </viewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="iYj-Kq-Ea1" userLabel="First Responder" sceneMemberID="firstResponder"/>
+            </objects>
+            <point key="canvasLocation" x="53" y="375"/>
+        </scene>
+    </scenes>
+</document>
diff --git a/examples/ios/ios-src/Base.lproj/Main.storyboard b/examples/ios/ios-src/Base.lproj/Main.storyboard
new file mode 100644
index 000000000..808a21ce7
--- /dev/null
+++ b/examples/ios/ios-src/Base.lproj/Main.storyboard
@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="13122.16" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="BYZ-38-t0r">
+    <dependencies>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="13104.12"/>
+        <capability name="Safe area layout guides" minToolsVersion="9.0"/>
+        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
+    </dependencies>
+    <scenes>
+        <!--View Controller-->
+        <scene sceneID="tne-QT-ifu">
+            <objects>
+                <viewController id="BYZ-38-t0r" customClass="ViewController" customModuleProvider="" sceneMemberID="viewController">
+                    <view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">
+                        <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
+                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <color key="backgroundColor" xcode11CocoaTouchSystemColor="systemBackgroundColor" cocoaTouchSystemColor="whiteColor"/>
+                        <viewLayoutGuide key="safeArea" id="6Tk-OE-BBY"/>
+                    </view>
+                </viewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
+            </objects>
+        </scene>
+    </scenes>
+</document>
diff --git a/examples/ios/ios-src/Info.plist b/examples/ios/ios-src/Info.plist
new file mode 100644
index 000000000..462567911
--- /dev/null
+++ b/examples/ios/ios-src/Info.plist
@@ -0,0 +1,49 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>$(DEVELOPMENT_LANGUAGE)</string>
+	<key>CFBundleExecutable</key>
+	<string>$(EXECUTABLE_NAME)</string>
+	<key>CFBundleIdentifier</key>
+	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>$(PRODUCT_NAME)</string>
+	<key>CFBundlePackageType</key>
+	<string>$(PRODUCT_BUNDLE_PACKAGE_TYPE)</string>
+	<key>CFBundleShortVersionString</key>
+	<string>1.0</string>
+	<key>CFBundleVersion</key>
+	<string>1</string>
+	<key>LSRequiresIPhoneOS</key>
+	<true/>
+	<key>UIApplicationSupportsIndirectInputEvents</key>
+	<true/>
+	<key>UILaunchStoryboardName</key>
+	<string>LaunchScreen</string>
+	<key>UIMainStoryboardFile</key>
+	<string>Main</string>
+	<key>UIRequiredDeviceCapabilities</key>
+	<array>
+		<string>armv7</string>
+	</array>
+	<key>UISupportedInterfaceOrientations</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
+	</array>
+	<key>NSMicrophoneUsageDescription</key>
+	<string>coreaudio-rs feedback demo</string>
+	<key>UISupportedInterfaceOrientations~ipad</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationPortraitUpsideDown</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
+	</array>
+</dict>
+</plist>
diff --git a/examples/ios/ios-src/ViewController.h b/examples/ios/ios-src/ViewController.h
new file mode 100644
index 000000000..098223ebd
--- /dev/null
+++ b/examples/ios/ios-src/ViewController.h
@@ -0,0 +1,14 @@
+//
+//  ViewController.h
+//  coreaudio-ios-example
+//
+//  Created by Michael Hills on 2/10/20.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface ViewController : UIViewController
+
+
+@end
+
diff --git a/examples/ios/ios-src/ViewController.m b/examples/ios/ios-src/ViewController.m
new file mode 100644
index 000000000..2e74e8b4d
--- /dev/null
+++ b/examples/ios/ios-src/ViewController.m
@@ -0,0 +1,22 @@
+//
+//  ViewController.m
+//  coreaudio-ios-example
+//
+//  Created by Michael Hills on 2/10/20.
+//
+
+#import "ViewController.h"
+
+@interface ViewController ()
+
+@end
+
+@implementation ViewController
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+    // Do any additional setup after loading the view.
+}
+
+
+@end
diff --git a/examples/ios/ios-src/main.m b/examples/ios/ios-src/main.m
new file mode 100644
index 000000000..4c9d95504
--- /dev/null
+++ b/examples/ios/ios-src/main.m
@@ -0,0 +1,18 @@
+//
+//  main.m
+//  coreaudio-ios-example
+//
+//  Created by Michael Hills on 2/10/20.
+//
+
+#import <UIKit/UIKit.h>
+#import "AppDelegate.h"
+
+int main(int argc, char * argv[]) {
+    NSString * appDelegateClassName;
+    @autoreleasepool {
+        // Setup code that might create autoreleased objects goes here.
+        appDelegateClassName = NSStringFromClass([AppDelegate class]);
+    }
+    return UIApplicationMain(argc, argv, nil, appDelegateClassName);
+}
diff --git a/examples/ios/src/feedback.rs b/examples/ios/src/feedback.rs
new file mode 100644
index 000000000..d0bca8e47
--- /dev/null
+++ b/examples/ios/src/feedback.rs
@@ -0,0 +1,160 @@
+//! A basic input + output stream example, copying the mic input stream to the default output stream
+
+extern crate coreaudio;
+
+use std::collections::VecDeque;
+use std::sync::{Arc, Mutex};
+
+use coreaudio::audio_unit::{AudioUnit, Element, SampleFormat, Scope, StreamFormat};
+use coreaudio::audio_unit::audio_format::LinearPcmFlags;
+use coreaudio::audio_unit::render_callback::{self, data};
+use coreaudio::sys::*;
+
+
+type S = f32; const SAMPLE_FORMAT: SampleFormat = SampleFormat::F32;
+// type S = i32; const SAMPLE_FORMAT: SampleFormat = SampleFormat::I32;
+// type S = i16; const SAMPLE_FORMAT: SampleFormat = SampleFormat::I16;
+// type S = i8; const SAMPLE_FORMAT: SampleFormat = SampleFormat::I8;
+
+pub fn run_example() -> Result<(), coreaudio::Error> {
+    let mut input_audio_unit = AudioUnit::new(coreaudio::audio_unit::IOType::RemoteIO)?;
+    let mut output_audio_unit = AudioUnit::new(coreaudio::audio_unit::IOType::RemoteIO)?;
+
+    // Read device sample rate off the output stream
+    let id = kAudioUnitProperty_StreamFormat;
+    let asbd: AudioStreamBasicDescription =
+        output_audio_unit.get_property(id, Scope::Output, Element::Output)?;
+    let sample_rate = asbd.mSampleRate;
+
+    // iOS doesn't let you reconfigure an "initialized" audio unit, so uninitialize them
+    input_audio_unit.uninitialize()?;
+    output_audio_unit.uninitialize()?;
+
+    configure_for_recording(&mut input_audio_unit)?;
+
+    let format_flag = match SAMPLE_FORMAT {
+        SampleFormat::F32 => LinearPcmFlags::IS_FLOAT,
+        SampleFormat::I32 | SampleFormat::I16 | SampleFormat::I8 => LinearPcmFlags::IS_SIGNED_INTEGER,
+    };
+
+    // Using IS_NON_INTERLEAVED everywhere because data::Interleaved is commented out / not implemented
+    let in_stream_format = StreamFormat {
+        sample_rate: sample_rate,
+        sample_format: SAMPLE_FORMAT,
+        flags: format_flag | LinearPcmFlags::IS_PACKED | LinearPcmFlags::IS_NON_INTERLEAVED,
+        // audio_unit.set_input_callback is hardcoded to 1 buffer, and when using non_interleaved
+        // we are forced to 1 channel
+        channels_per_frame: 1,
+    };
+
+    let out_stream_format = StreamFormat {
+        sample_rate: sample_rate,
+        sample_format: SAMPLE_FORMAT,
+        flags: format_flag | LinearPcmFlags::IS_PACKED | LinearPcmFlags::IS_NON_INTERLEAVED,
+        // you can change this to 1
+        channels_per_frame: 2,
+    };
+
+    println!("input={:#?}", &in_stream_format);
+    println!("output={:#?}", &out_stream_format);
+    println!("input_asbd={:#?}", &in_stream_format.to_asbd());
+    println!("output_asbd={:#?}", &out_stream_format.to_asbd());
+
+    let id = kAudioUnitProperty_StreamFormat;
+    input_audio_unit.set_property(id, Scope::Output, Element::Input, Some(&in_stream_format.to_asbd()))?;
+    output_audio_unit.set_property(id, Scope::Input, Element::Output, Some(&out_stream_format.to_asbd()))?;
+
+    let buffer_left = Arc::new(Mutex::new(VecDeque::<S>::new()));
+    let producer_left = buffer_left.clone();
+    let consumer_left = buffer_left.clone();
+    let buffer_right = Arc::new(Mutex::new(VecDeque::<S>::new()));
+    let producer_right = buffer_right.clone();
+    let consumer_right = buffer_right.clone();
+
+    // seed roughly 1 second of data to create a delay in the feedback loop for easier testing
+    for buffer in vec![buffer_left, buffer_right] {
+        let mut buffer = buffer.lock().unwrap();
+        for _ in 0..(out_stream_format.sample_rate as i32) {
+            buffer.push_back(0 as S);
+        }
+    }
+
+    type Args = render_callback::Args<data::NonInterleaved<S>>;
+
+    println!("set_input_callback");
+    input_audio_unit.set_input_callback(move |args| {
+        let Args {
+            num_frames,
+            mut data,
+            ..
+        } = args;
+        let buffer_left = producer_left.lock().unwrap();
+        let buffer_right = producer_right.lock().unwrap();
+        let mut buffers = vec![buffer_left, buffer_right];
+        for i in 0..num_frames {
+            for (ch, channel) in data.channels_mut().enumerate() {
+                let value: S = channel[i];
+                buffers[ch].push_back(value);
+            }
+        }
+        Ok(())
+    })?;
+    input_audio_unit.initialize()?;
+    input_audio_unit.start()?;
+
+    println!("set_render_callback");
+    output_audio_unit.set_render_callback(move |args: Args| {
+        let Args {
+            num_frames,
+            mut data,
+            ..
+        } = args;
+
+        let buffer_left = consumer_left.lock().unwrap();
+        let buffer_right = consumer_right.lock().unwrap();
+        let mut buffers = vec![buffer_left, buffer_right];
+        for i in 0..num_frames {
+            // Default other channels to copy value from first channel as a fallback
+            let zero: S = 0 as S;
+            let f: S = *buffers[0].front().unwrap_or(&zero);
+            for (ch, channel) in data.channels_mut().enumerate() {
+                let sample: S = buffers[ch].pop_front().unwrap_or(f);
+                channel[i] = sample;
+            }
+        }
+        Ok(())
+    })?;
+    output_audio_unit.initialize()?;
+    output_audio_unit.start()?;
+
+    // for the purposes of this demo, leak these so that after returning the audio units will
+    // keep running
+    std::mem::forget(input_audio_unit);
+    std::mem::forget(output_audio_unit);
+
+    Ok(())
+}
+
+fn configure_for_recording(audio_unit: &mut AudioUnit) -> Result<(), coreaudio::Error> {
+    println!("Configure audio unit for recording");
+
+    // Enable mic recording
+    let enable_input = 1u32;
+    audio_unit.set_property(
+        kAudioOutputUnitProperty_EnableIO,
+        Scope::Input,
+        Element::Input,
+        Some(&enable_input),
+    )?;
+
+    // Disable output
+    let disable_output = 0u32;
+    audio_unit.set_property(
+        kAudioOutputUnitProperty_EnableIO,
+        Scope::Output,
+        Element::Output,
+        Some(&disable_output),
+    )?;
+
+    Ok(())
+}
diff --git a/examples/ios/src/lib.rs b/examples/ios/src/lib.rs
new file mode 100644
index 000000000..286636116
--- /dev/null
+++ b/examples/ios/src/lib.rs
@@ -0,0 +1,6 @@
+mod feedback;
+
+#[no_mangle]
+pub extern "C" fn rust_ios_main() {
+  feedback::run_example().unwrap();
+}
diff --git a/src/audio_unit/mod.rs b/src/audio_unit/mod.rs
index 9e4459bbe..d9b5b7e91 100644
--- a/src/audio_unit/mod.rs
+++ b/src/audio_unit/mod.rs
@@ -171,6 +171,29 @@ impl AudioUnit {
         }
     }
 
+    /// On successful initialization, the audio formats for input and output are valid
+    /// and the audio unit is ready to render. During initialization, an audio unit
+    /// allocates memory according to the maximum number of audio frames it can produce
+    /// in response to a single render call.
+    ///
+    /// Usually, the state of an audio unit (such as its I/O formats and memory allocations)
+    /// cannot be changed while an audio unit is initialized.
+    pub fn initialize(&mut self) -> Result<(), Error> {
+        unsafe { try_os_status!(sys::AudioUnitInitialize(self.instance)); }
+        Ok(())
+    }
+
+    /// Before you change an initialize audio unit’s processing characteristics,
+    /// such as its input or output audio data format or its sample rate, you must
+    /// first uninitialize it. Calling this function deallocates the audio unit’s resources.
+    ///
+    /// After calling this function, you can reconfigure the audio unit and then call
+    /// AudioUnitInitialize to reinitialize it.
+    pub fn uninitialize(&mut self) -> Result<(), Error> {
+        unsafe { try_os_status!(sys::AudioUnitUninitialize(self.instance)); }
+        Ok(())
+    }
+
     /// Sets the value for some property of the **AudioUnit**.
     ///
     /// To clear an audio unit property value, set the data paramater with `None::<()>`.
@@ -300,6 +323,8 @@ impl Drop for AudioUnit {
 
             self.free_render_callback();
             self.free_input_callback();
+
+            error::Error::from_os_status(sys::AudioComponentInstanceDispose(self.instance)).ok();
         }
     }
 }
@@ -375,3 +400,28 @@ pub fn get_property<T>(
         Ok(data)
     }
 }
+
+/// Gets the value of a specified audio session property.
+///
+/// **Available** in iOS 2.0 and later.
+///
+/// Parameters
+/// ----------
+///
+/// - **id**: The identifier of the property.
+#[cfg(target_os = "ios")]
+pub fn audio_session_get_property<T>(
+    id: u32,
+) -> Result<T, Error>
+{
+    let mut size = ::std::mem::size_of::<T>() as u32;
+    unsafe {
+        let mut data: T = ::std::mem::uninitialized();
+        let data_ptr = &mut data as *mut _ as *mut c_void;
+        let size_ptr = &mut size as *mut _;
+        try_os_status!(
+            sys::AudioSessionGetProperty(id, size_ptr, data_ptr)
+        );
+        Ok(data)
+    }
+}
diff --git a/src/audio_unit/render_callback.rs b/src/audio_unit/render_callback.rs
index e0c5668a7..4dcbbdc13 100644
--- a/src/audio_unit/render_callback.rs
+++ b/src/audio_unit/render_callback.rs
@@ -398,7 +398,7 @@ impl AudioUnit {
         // First, we'll retrieve the stream format so that we can ensure that the given callback
         // format matches the audio unit's format.
         let id = sys::kAudioUnitProperty_StreamFormat;
-        let asbd = try!(self.get_property(id, Scope::Output, Element::Output));
+        let asbd = try!(self.get_property(id, Scope::Input, Element::Output));
         let stream_format = super::StreamFormat::from_asbd(asbd)?;
 
         // If the stream format does not match, return an error indicating this.
@@ -471,7 +471,7 @@ impl AudioUnit {
         // First, we'll retrieve the stream format so that we can ensure that the given callback
         // format matches the audio unit's format.
         let id = sys::kAudioUnitProperty_StreamFormat;
-        let asbd = self.get_property(id, Scope::Input, Element::Input)?;
+        let asbd = self.get_property(id, Scope::Output, Element::Input)?;
         let stream_format = super::StreamFormat::from_asbd(asbd)?;
 
         // If the stream format does not match, return an error indicating this.
@@ -482,8 +482,20 @@ impl AudioUnit {
         // Pre-allocate a buffer list for input stream.
         //
         // First, get the current buffer size for pre-allocating the `AudioBuffer`s.
-        let id = sys::kAudioDevicePropertyBufferFrameSize;
-        let mut buffer_frame_size: u32 = self.get_property(id, Scope::Global, Element::Output)?;
+        #[cfg(target_os = "macos")]
+        let mut buffer_frame_size: u32 = {
+            let id = sys::kAudioDevicePropertyBufferFrameSize;
+            let buffer_frame_size: u32 = self.get_property(id, Scope::Global, Element::Output)?;
+            buffer_frame_size
+        };
+        #[cfg(target_os = "ios")]
+        let mut buffer_frame_size: u32 = {
+            let id = sys::kAudioSessionProperty_CurrentHardwareIOBufferDuration;
+            let seconds: f32 = super::audio_session_get_property(id)?;
+            let id = sys::kAudioSessionProperty_CurrentHardwareSampleRate;
+            let sample_rate: f64 = super::audio_session_get_property(id)?;
+            (sample_rate * seconds as f64).round() as u32
+        };
         let mut data: Vec<u8> = vec![];
         let sample_bytes = stream_format.sample_format.size_in_bytes();
         let n_channels = stream_format.channels_per_frame;
@@ -525,7 +537,7 @@ impl AudioUnit {
                 unsafe {
                     // Retrieve the up-to-date stream format.
                     let id = sys::kAudioUnitProperty_StreamFormat;
-                    let asbd = match super::get_property(audio_unit, id, Scope::Input, Element::Output) {
+                    let asbd = match super::get_property(audio_unit, id, Scope::Output, Element::Input) {
                         Err(err) => return err.to_os_status(),
                         Ok(asbd) => asbd,
                     };