import random import gradio as gr import numpy as np import rtmidi import MIDI import base64 import io import os from huggingface_hub import hf_hub_download from midi_synthesizer import MidiSynthesizer MAX_SEED = np.iinfo(np.int32).max # Example song data (simplified from original) SONG_DATA = { "title": "Do You Believe in Love", "progression": ["G", "D", "Em", "C"], "lyrics": ["I was walking down a one-way street", "Just a-looking for someone to meet"] } class MIDIDeviceManager: def __init__(self): self.midiout = rtmidi.MidiOut() self.midiin = rtmidi.MidiIn() def get_available_devices(self): return self.midiout.get_ports() or ["No MIDI devices"] def get_device_info(self): devices = self.get_available_devices() return "\n".join([f"Port {i}: {name}" for i, name in enumerate(devices)]) if devices else "No MIDI devices detected" class MIDIManager: def __init__(self): self.soundfont_path = hf_hub_download(repo_id="skytnt/midi-model", filename="soundfont.sf2") self.synthesizer = MidiSynthesizer(self.soundfont_path) self.loaded_midi = {} # midi_id: (file_path, midi_obj) self.modified_files = [] self.is_playing = False self.example_files = self.load_example_midis() def load_example_midis(self): examples = {} example_dir = "examples" if os.path.exists(example_dir): for file in os.listdir(example_dir): if file.endswith(".mid") or file.endswith(".midi"): midi_id = f"example_{len(examples)}" file_path = os.path.join(example_dir, file) examples[midi_id] = (file_path, MIDI.load(file_path)) if not examples: midi = MIDI.MIDIFile(1) midi.addTrack() midi.addNote(0, 0, 60, 0, 100, 100) # Default C4 examples["example_0"] = ("Simple C4.mid", midi) return examples def load_midi(self, file_path): midi = MIDI.load(file_path) midi_id = f"midi_{len(self.loaded_midi) - len(self.example_files)}" self.loaded_midi[midi_id] = (file_path, midi) return midi_id def extract_notes_and_instruments(self, midi): notes = [] instruments = set() for track in midi.tracks: for event in track.events: if event.type == 'note_on' and event.velocity > 0: notes.append((event.note, event.velocity, event.time)) if hasattr(event, 'program'): instruments.add(event.program) return notes, list(instruments) def generate_variation(self, midi_id, length_factor=2, variation=0.3): if midi_id not in self.loaded_midi: return None _, midi = self.loaded_midi[midi_id] notes, instruments = self.extract_notes_and_instruments(midi) new_notes = [] for _ in range(int(length_factor)): for note, vel, time in notes: if random.random() < variation: new_note = min(127, max(0, note + random.randint(-2, 2))) new_vel = min(127, max(0, vel + random.randint(-10, 10))) new_notes.append((new_note, new_vel, time)) else: new_notes.append((note, vel, time)) new_midi = MIDI.MIDIFile(len(instruments) or 1) for i, inst in enumerate(instruments or [0]): new_midi.addTrack() new_midi.addProgramChange(i, 0, 0, inst) for note, vel, time in new_notes: new_midi.addNote(i, 0, note, time, 100, vel) output = io.BytesIO() new_midi.writeFile(output) midi_data = base64.b64encode(output.getvalue()).decode('utf-8') self.modified_files.append(midi_data) return midi_data def apply_synth_effect(self, midi_data, effect, intensity): midi = MIDI.load(io.BytesIO(base64.b64decode(midi_data))) if effect == "tempo": factor = 1 + (intensity - 0.5) * 0.4 for track in midi.tracks: for event in track.events: event.time = int(event.time * factor) output = io.BytesIO() midi.writeFile(output) midi_data = base64.b64encode(output.getvalue()).decode('utf-8') self.modified_files.append(midi_data) return midi_data def play_with_loop(self, midi_data): self.is_playing = True midi_file = MIDI.load(io.BytesIO(base64.b64decode(midi_data))) while self.is_playing: self.synthesizer.play_midi(midi_file) return "Stopped" def stop_playback(self): self.is_playing = False return "Stopping..." midi_manager = MIDIDeviceManager() midi_processor = MIDIManager() def create_download_list(): html = "

Downloads

" return html def get_midi_choices(): return [(os.path.basename(path), midi_id) for midi_id, (path, _) in midi_processor.loaded_midi.items()] with gr.Blocks(theme=gr.themes.Soft()) as app: gr.Markdown("

🎵 MIDI Composer 🎵

") with gr.Tabs(): # Tab 1: Upload MIDI with gr.Tab("Upload MIDI"): midi_files = gr.File(label="Upload MIDI Files", file_count="multiple") loaded_display = gr.HTML(value="No files loaded") output = gr.Audio(label="Generated Preview", type="bytes", autoplay=True) def load_and_generate(files): html = "

Loaded Files

" midi_data = None for file in files or []: midi_id = midi_processor.load_midi(file.name) html += f"
{file.name}
" midi_data = midi_processor.generate_variation(midi_id) # Auto-generate return html, (io.BytesIO(base64.b64decode(midi_data)) if midi_data else None), get_midi_choices() midi_files.change(load_and_generate, inputs=[midi_files], outputs=[loaded_display, output, gr.State(get_midi_choices())]) # Tab 2: Generate & Perform with gr.Tab("Generate & Perform"): midi_select = gr.Dropdown(label="Select MIDI", choices=get_midi_choices(), value=None) length_factor = gr.Slider(1, 5, value=2, step=1, label="Length Factor") variation = gr.Slider(0, 1, value=0.3, label="Variation") generate_btn = gr.Button("Generate") effect = gr.Radio(["tempo"], label="Synth Effect", value="tempo") intensity = gr.Slider(0, 1, value=0.5, label="Effect Intensity") apply_btn = gr.Button("Apply Effect") stop_btn = gr.Button("Stop Playback") output = gr.Audio(label="Preview", type="bytes", autoplay=True) status = gr.Textbox(label="Status", value="Ready") midi_device = gr.Dropdown(label="MIDI Output Device", choices=midi_manager.get_available_devices(), type="index") tempo = gr.Slider(label="Tempo (BPM)", minimum=40, maximum=200, value=120, step=1) def update_dropdown(choices): return gr.update(choices=choices) gr.State(get_midi_choices()).change(update_dropdown, inputs=[gr.State()], outputs=[midi_select]) def generate(midi_id, length, var): if not midi_id: return None, "Select a MIDI file" midi_data = midi_processor.generate_variation(midi_id, length, var) midi_processor.play_with_loop(midi_data) return io.BytesIO(base64.b64decode(midi_data)), "Playing" def apply_effect(midi_data, fx, inten): if not midi_data: return None, "Generate a MIDI first" new_data = midi_processor.apply_synth_effect(midi_data.decode('utf-8'), fx, inten) midi_processor.play_with_loop(new_data) return io.BytesIO(base64.b64decode(new_data)), "Playing" generate_btn.click(generate, inputs=[midi_select, length_factor, variation], outputs=[output, status]) apply_btn.click(apply_effect, inputs=[output, effect, intensity], outputs=[output, status]) stop_btn.click(midi_processor.stop_playback, inputs=None, outputs=[status]) # Tab 3: Downloads with gr.Tab("Downloads"): downloads = gr.HTML(value="No files yet") def update_downloads(*args): return create_download_list() gr.on(triggers=[midi_files.change, generate_btn.click, apply_btn.click], fn=update_downloads, inputs=None, outputs=[downloads]) gr.Markdown("""
Hugging Face Logo
Hugging Face
Models | Datasets | Spaces | Posts | Docs | Enterprise | Pricing
""") app.queue().launch(inbrowser=True)