diff --git a/media/bad_apple.mid b/media/bad_apple.mid
new file mode 100644
index 0000000..563f886
Binary files /dev/null and b/media/bad_apple.mid differ
diff --git a/src/main.rs b/src/main.rs
index 03704d6..29f9171 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -2,8 +2,14 @@ use std::{fs, io::{stdout, Write}};
 
 use midly::Smf;
 
-const FILENAME: &str = "media/TOUHOU - Bad Apple!!.mid";
-const STEP: u32 = 96;
+// const FILENAME: &str = "media/TOUHOU - Bad Apple!!.mid";
+// const STEP: u32 = 96;
+// const HIGHEST_NOST: u32 = 90;
+// const TRACK: usize = 0;
+
+const FILENAME: &str = "media/bad_apple.mid";
+const STEP: u32 = 32;
+const HIGHEST_NOTE: usize = 84;
 const TRACK: usize = 0;
 
 fn get_u32(bits: &[bool; 32]) -> u32 {
@@ -25,9 +31,14 @@ fn main() {
     let mut current_on_upper = [false; 32]; // higher notes
     let mut current_on_lower = [false; 32]; // lower notes
 
+    let highest_upper_note = HIGHEST_NOTE;
+    let lowest_upper_note = HIGHEST_NOTE - 31;
+    let highest_lower_note = HIGHEST_NOTE - 32;
+    let lowest_lower_note = HIGHEST_NOTE - 63;
+
     let track = &smf.tracks[TRACK];
     for (_, event) in track.iter().enumerate() {
-        // println!("{}", event.delta);
+        eprintln!("delta: {}", event.delta);
         let mut delta = event.delta.as_int();
         while delta >= STEP {
             delta -= STEP;
@@ -40,28 +51,29 @@ fn main() {
             midly::TrackEventKind::Midi { channel: _, message } => match message {
                 midly::MidiMessage::NoteOff { key, vel: _ } => {
                     let key_i = key.as_int() as usize;
-                    if key_i >= 59 && key_i <= 90 {
-                        current_on_upper[key_i-59] = false;
+                    if key_i >= lowest_upper_note && key_i <= highest_upper_note {
+                        current_on_upper[key_i - lowest_upper_note] = false;
                     }
-                    if key_i >= 27 && key_i <= 58 {
-                        current_on_lower[key_i-27] = false;
+                    if key_i >= lowest_lower_note && key_i <= highest_lower_note {
+                        current_on_lower[key_i - lowest_lower_note] = false;
                     }
                 }
                 midly::MidiMessage::NoteOn { key, vel: _ } => {
                     let key_i = key.as_int() as usize;
-                    if key_i >= 59 && key_i <= 90 {
-                        current_on_upper[key_i-59] = true;
+                    eprintln!("key: {}", key_i);
+                    if key_i >= lowest_upper_note && key_i <= highest_upper_note {
+                        current_on_upper[key_i - lowest_upper_note] = true;
                     }
-                    if key_i >= 27 && key_i <= 58 {
-                        current_on_lower[key_i-27] = true;
+                    if key_i >= lowest_lower_note && key_i <= highest_lower_note {
+                        current_on_lower[key_i - lowest_lower_note] = true;
                     }
                 }
                 _ => {
-                    // println!("event {}: {:?}", i, message);
+                    // eprintln!("event {}: {:?}", i, message);
                 }
             },
             _ => {
-                // println!("event {}: {:?}", i, event);
+                // eprintln!("event {}: {:?}", i, event);
             }
         }
     }