diff --git a/src/main.rs b/src/main.rs
index 613b517..4ca8922 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -5,6 +5,8 @@ extern crate colour;
 
 mod reskit;
 use std::error::Error;
+use std::fs::File;
+use std::io::Write;
 use clap::{App, Arg, SubCommand};
 use reskit::soundtrack::dmf::DmfModule;
 use reskit::utility;
@@ -79,6 +81,13 @@ fn run() -> Result<(), Box<dyn Error>> {
 
         let result = DmfModule::from_file( &input_filename )?;
 
+        let eef_files = result.get_eefs()?;
+        for ( filename, data ) in eef_files {
+            println!( "Creating EEF instrument file {}", filename );
+            let mut file = File::create( filename )?;
+            file.write_all( &data )?
+        }
+
         // TODO !!
 
         Ok( () )
diff --git a/src/reskit/soundtrack/dmf.rs b/src/reskit/soundtrack/dmf.rs
index 821a447..0cc8c04 100644
--- a/src/reskit/soundtrack/dmf.rs
+++ b/src/reskit/soundtrack/dmf.rs
@@ -1,6 +1,6 @@
 use std::{error::Error, fs::File, io::Read, convert::TryInto, collections::HashMap, cmp::{min, max}};
 use flate2::read::ZlibDecoder;
-use crate::reskit::{utility::{get_string, get_u8, skip, get_u32, get_i8, get_i32, get_u16, get_i16, Ring, arrays_equal}, soundtrack::types::{SampleRate, SampleFormat, PsgEnvelope}};
+use crate::reskit::{utility::{get_string, get_u8, skip, get_u32, get_i8, get_i32, get_u16, get_i16, Ring}, soundtrack::types::{SampleRate, SampleFormat, PsgEnvelope}};
 
 use super::types::{Sample, Note, PsgSettings};
 
@@ -676,8 +676,8 @@ impl DmfModule {
                     initial_arpeggio_repeat.push( arpeggio_repeat_pattern.next().expect( "fatal: internal error (arpeggio_repeat_pattern)" ) );
                 }
 
-                volume_repeat.append( &mut initial_volume_repeat );
-                arpeggio_repeat.append( &mut initial_arpeggio_repeat );
+                volume_repeat.extend( &initial_volume_repeat );
+                arpeggio_repeat.extend( &initial_arpeggio_repeat );
 
                 loop {
                     // Guard against OOM
@@ -693,7 +693,7 @@ impl DmfModule {
                     }
 
                     // End loop once the pattern begins repeating
-                    if arrays_equal( &initial_volume_repeat, &volume_repeat_period ) && arrays_equal( &initial_arpeggio_repeat, &arpeggio_repeat_period ) {
+                    if initial_volume_repeat == volume_repeat_period && initial_arpeggio_repeat == arpeggio_repeat_period {
                         break;
                     } else {
                     // If it doesn't repeat, append and generate another period
@@ -718,7 +718,7 @@ impl DmfModule {
                 // Echo end loop command
                 envelope.push( 0xFF );
 
-                eefs.insert( instrument.name.clone(), envelope );
+                eefs.insert( format!( "{}.eef", instrument.name ), envelope );
             }
         }
 
@@ -733,7 +733,7 @@ impl DmfModule {
 }
 
 fn get_eef_volume( dmf_volume: u8 ) -> Result<u8, Box<dyn Error>> {
-    Ok( max( dmf_volume, 0x0F ) )
+    Ok( min( dmf_volume, 0x0F ) )
 }
 
 fn get_eef_shift( dmf_shift: i8 ) -> Result<u8, Box<dyn Error>> {
diff --git a/src/reskit/utility.rs b/src/reskit/utility.rs
index 6f385fe..8e108be 100644
--- a/src/reskit/utility.rs
+++ b/src/reskit/utility.rs
@@ -37,22 +37,6 @@ impl< Type: Copy > Iterator for Ring< Type > {
 
 }
 
-pub fn arrays_equal< Type: PartialEq >( array1: &Vec<Type>, array2: &Vec<Type> ) -> bool {
-    if array1.len() != array2.len() {
-        return false
-    }
-
-    for i1 in 0..array1.len() {
-        for i2 in 0..array2.len() {
-            if array1[ i1 ] != array2[ i2 ] {
-                return false
-            }
-        }
-    }
-
-    true
-}
-
 pub fn print_error( error_msg: &str ) {
 	red!( "fatal: " ); println!( "{}", error_msg );
 }