commit 4320ceb50d77ecea6221ce09c8a952d1420c70c2
Author: F04C <israeldarrel01@gmail.com>
Date:   Sun Aug 11 15:54:22 2024 +0800

    initial commit - will add more functionalities to this project

diff --git a/app.py b/app.py
new file mode 100644
index 0000000..93faeea
--- /dev/null
+++ b/app.py
@@ -0,0 +1,132 @@
+import librosa
+import librosa.display
+import numpy as np
+import matplotlib.pyplot as plt
+from scipy.signal import butter, filtfilt
+import sounddevice as sd
+from tkinter import Tk
+from tkinter.filedialog import askopenfilename
+import threading
+from matplotlib.widgets import Cursor
+
+# Function to apply a band-pass filter
+def bandpass_filter(data, lowcut, highcut, fs, order=5):
+    nyquist = 0.5 * fs
+    low = lowcut / nyquist
+    high = highcut / nyquist
+    b, a = butter(order, [low, high], btype='band')
+    y = filtfilt(b, a, data)
+    return y
+
+# Function to detect snare hits
+def detect_snare_hits(audio_file):
+    # Load the audio file
+    y, sr = librosa.load(audio_file, sr=None)
+
+    # Apply a band-pass filter to focus on snare frequencies
+    y_filtered = bandpass_filter(y, 1000, 5000, sr)
+
+    # Detect onsets (potential snare hits)
+    onset_frames = librosa.onset.onset_detect(y=y_filtered, sr=sr, backtrack=True)
+    onset_times = librosa.frames_to_time(onset_frames, sr=sr)
+
+    return y, sr, onset_times
+
+# Function to visualize only snare hits with zoom functionality
+def visualize_snare_hits(y, sr, onset_times, output_file=None):
+    fig, ax = plt.subplots(figsize=(14, 5))
+    
+    # Plot snare hits only
+    ax.plot(onset_times, np.zeros_like(onset_times), 'go', label='Snare Hit')
+
+    # Add cursor for interactivity
+    cursor = Cursor(ax, useblit=True, color='red', linewidth=1)
+
+    def on_click(event):
+        if event.inaxes == ax:
+            time = event.xdata
+            closest_time = min(onset_times, key=lambda x: abs(x - time))
+            ax.annotate(f'Snare Hit\nTime: {closest_time:.2f}s', xy=(closest_time, 0), 
+                        xytext=(closest_time + 0.5, 0.1),
+                        arrowprops=dict(facecolor='black', shrink=0.05))
+            plt.draw()
+
+    fig.canvas.mpl_connect('button_press_event', on_click)
+
+    ax.set_title('Detected Snare Hits')
+    ax.set_xlabel('Time (s)')
+    ax.set_ylabel('Amplitude')
+    ax.legend(loc="upper right")
+
+    # Save the plot if an output file is specified, otherwise show it
+    if output_file:
+        plt.savefig(output_file)
+    else:
+        plt.show()
+
+# Function to play/pause the audio
+def play_audio(y, sr):
+    global audio_playing
+    play_pos = 0
+
+    def callback(outdata, frames, time, status):
+        nonlocal play_pos
+        if audio_playing:
+            if play_pos + frames > len(y):
+                frames = len(y) - play_pos
+                outdata[:frames] = y[play_pos:play_pos+frames].reshape(-1, 1)
+                outdata[frames:] = 0
+            else:
+                outdata[:] = y[play_pos:play_pos+frames].reshape(-1, 1)
+            play_pos += frames
+        else:
+            outdata[:] = np.zeros((frames, 1))
+    
+    with sd.OutputStream(samplerate=sr, channels=1, callback=callback):
+        while audio_playing and play_pos < len(y):
+            sd.sleep(100)
+
+# Function to toggle play/pause
+def toggle_play_pause():
+    global audio_playing
+    audio_playing = not audio_playing
+
+# Main function to run the app
+def main():
+    global audio_playing
+
+    # Open a file dialog to select the audio file
+    Tk().withdraw()  # Prevent the root window from appearing
+    audio_file = askopenfilename(filetypes=[("Mp3", "*.mp3"), ("All files", "*.*")])
+
+    if not audio_file:
+        print("No file selected.")
+        return
+
+    # Detect snare hits
+    y, sr, onset_times = detect_snare_hits(audio_file)
+
+    # Visualize the snare hits
+    visualize_snare_hits(y, sr, onset_times)
+
+    # Play/Pause functionality
+    audio_playing = False
+    play_thread = threading.Thread(target=play_audio, args=(y, sr))
+    play_thread.start()
+
+    while True:
+        command = input("Enter 'play' to play, 'pause' to pause, or 'exit' to exit: ").strip().lower()
+        if command == 'play':
+            toggle_play_pause()
+        elif command == 'pause':
+            toggle_play_pause()
+        elif command == 'exit':
+            audio_playing = False
+            play_thread.join()
+            break
+        else:
+            print("Invalid command. Please enter 'play', 'pause', or 'exit'.")
+
+# Run the app
+if __name__ == '__main__':
+    main()