diff --git a/Cargo.lock b/Cargo.lock
index 5ac3906..9d3c9c0 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -40,6 +40,9 @@ checksum = "216261ddc8289130e551ddcd5ce8a064710c0d064a4d2895c67151c92b5443f6"
 [[package]]
 name = "audio_interface"
 version = "0.1.0"
+dependencies = [
+ "std",
+]
 
 [[package]]
 name = "base64"
diff --git a/libraries/audio_interface/Cargo.toml b/libraries/audio_interface/Cargo.toml
index 50cb4fc..11fe12f 100644
--- a/libraries/audio_interface/Cargo.toml
+++ b/libraries/audio_interface/Cargo.toml
@@ -6,3 +6,4 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+std = { path = "../std" }
diff --git a/libraries/audio_interface/src/lib.rs b/libraries/audio_interface/src/lib.rs
index 36bb60b..d5521f7 100644
--- a/libraries/audio_interface/src/lib.rs
+++ b/libraries/audio_interface/src/lib.rs
@@ -1,3 +1,5 @@
+#![no_std]
+
 pub struct AudioObject {
     //  Play one bit per this interval
     playback_speed: u64,
@@ -11,22 +13,21 @@ impl AudioInterface for AudioObject {
     }
 
     fn play() -> Result<(), AudioErrors> {
-        todo!()
+        todo!();
+        Ok(())
     }
 
     fn stop() -> Result<(), AudioErrors> {
-        todo!()
+        todo!();
+        Ok(())
     }
 
     fn fill_playback_buffer(&mut self, playback_slice: [u8; 128]) -> Result<(), AudioErrors> {
-        todo!()
+        todo!();
+        Ok(())
     }
 }
 
-pub enum AudioErrors {
-    EmptyPlaybackBuffer,
-}
-
 pub trait AudioInterface {
     fn pause(&mut self) -> Result<(), AudioErrors>;
     fn play() -> Result<(), AudioErrors>;
@@ -36,3 +37,15 @@ pub trait AudioInterface {
 
     fn fill_playback_buffer(&mut self, playback_slice: [u8; 128]) -> Result<(), AudioErrors>;
 }
+
+pub enum AudioErrors {
+    EmptyPlaybackBuffer = 1,
+}
+
+impl std::Error for AudioErrors {
+    fn id(&self) -> u128 {
+        match self {
+            AudioErrors::EmptyPlaybackBuffer => 1,
+        }
+    }
+}
diff --git a/libraries/std/src/entry.rs b/libraries/std/src/entry.rs
index 97cef34..933653a 100644
--- a/libraries/std/src/entry.rs
+++ b/libraries/std/src/entry.rs
@@ -1,4 +1,4 @@
-use crate::{exit::exit, Error};
+use crate::exit::{exit, GenericError};
 
 #[no_mangle]
 unsafe extern "C" fn _start() -> ! {
@@ -16,10 +16,10 @@ unsafe extern "C" fn _start() -> ! {
         1 => {
             // TODO: Get errorID location and error message
 
-            Some(Error {
+            Some(GenericError {
                 error_id: 123456789,
-                location: None,
-                a_lil_message_as_a_treat: "Unknown Cause",
+                // location: None,
+                // a_lil_message_as_a_treat: "Unknown Cause",
             })
         }
         _ => panic!("Program returned an invalid isize"),
diff --git a/libraries/std/src/exit.rs b/libraries/std/src/exit.rs
index aa15c06..044864f 100644
--- a/libraries/std/src/exit.rs
+++ b/libraries/std/src/exit.rs
@@ -1,4 +1,18 @@
-use crate::Error;
+use crate::{Error, LocationInFile};
 
 /// Exit a program
-pub fn exit(error_code: Option<Error>) -> ! {}
+pub fn exit(error_code: Option<impl Error>) -> ! {
+    loop {}
+}
+
+pub struct GenericError {
+    pub error_id: u128,
+    // location: LocationInFile<'a>,
+    // a_lil_message_as_a_treat: &'a str,
+}
+
+impl Error for GenericError {
+    fn id(&self) -> u128 {
+        self.error_id
+    }
+}
diff --git a/libraries/std/src/io.rs b/libraries/std/src/io.rs
index 78fee16..b7092ce 100644
--- a/libraries/std/src/io.rs
+++ b/libraries/std/src/io.rs
@@ -2,11 +2,11 @@ pub enum IOErrors {
     UnknownError,
 }
 
-pub struct Port<T> {
-    inner: T,
-}
-impl<T> Port<T> {
-    pub fn read(&self) -> Result<T, IOErrors> {
-        Ok(self.inner)
-    }
-}
+// pub struct Port<T> {
+//     inner: T,
+// }
+// impl<T> Port<T> {
+//     pub fn read(&self) -> Result<T, IOErrors> {
+//         Ok(self.inner)
+//     }
+// }
diff --git a/libraries/std/src/lib.rs b/libraries/std/src/lib.rs
index 5801604..c54f1a6 100644
--- a/libraries/std/src/lib.rs
+++ b/libraries/std/src/lib.rs
@@ -58,21 +58,12 @@ pub struct LocationInFile<'a> {
     line: u16,
     column: u16,
 }
-impl<'a> Display for Error<'a> {
+impl<'a> Display for LocationInFile<'a> {
     fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
         write!(f, "{}{}{}", self.file_path, self.line, self.column)
     }
 }
 
-pub struct Error<'a> {
-    error_id: u128,
-    // Optional location of the error
-    location: Option<LocationInFile<'a>>,
-    a_lil_message_as_a_treat: &'a str,
-}
-
-impl<'a> Display for Error<'a> {
-    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
-        write!(f, "EID: {}\nSRC: {}", self.error_id, self.location)
-    }
+pub trait Error {
+    fn id(&self) -> u128;
 }