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Running on Zero
Running on Zero
| """Bounded audio decoding for the interactive demo (not benchmark evaluation).""" | |
| from pathlib import Path | |
| import librosa | |
| import numpy as np | |
| import soundfile as sf | |
| SAMPLE_RATE = 16000 | |
| MAX_SECONDS = 60 | |
| MAX_BYTES = 30 * 1024 * 1024 | |
| MAX_QUESTION_CHARS = 1000 | |
| DEFAULT_QUESTION = "How does my singing sound overall, and how can I improve?" | |
| def prepare_input(audio_path, question): | |
| question = (question or "").strip() | |
| if not question: | |
| raise ValueError("Please enter a question about your singing.") | |
| if len(question) > MAX_QUESTION_CHARS: | |
| raise ValueError(f"Please keep your question under {MAX_QUESTION_CHARS} characters.") | |
| if not audio_path: | |
| raise ValueError("Upload or record a singing clip first.") | |
| path = Path(audio_path) | |
| if not path.is_file() or path.stat().st_size > MAX_BYTES: | |
| raise ValueError("Please upload an audio file smaller than 30 MB.") | |
| try: | |
| with sf.SoundFile(path) as handle: | |
| sr = handle.samplerate | |
| if not 8000 <= sr <= 192000 or not 1 <= handle.channels <= 2: | |
| raise ValueError("Use mono or stereo audio with a sample rate of 8–192 kHz.") | |
| if not sr <= handle.frames <= MAX_SECONDS * sr: | |
| raise ValueError(f"Please use a clip between 1 and {MAX_SECONDS} seconds. Longer clips are not trimmed automatically.") | |
| wave = handle.read(dtype="float32", always_2d=True).mean(axis=1) | |
| except (sf.LibsndfileError, OSError) as exc: | |
| raise ValueError("Could not read this audio. Try a WAV, FLAC, or MP3 file.") from exc | |
| if not np.isfinite(wave).all(): | |
| raise ValueError("This audio contains invalid sample values. Please export it again.") | |
| if np.max(np.abs(wave)) < 1e-5: | |
| raise ValueError("This clip appears silent. Please upload a recording of singing.") | |
| if sr != SAMPLE_RATE: | |
| wave = librosa.resample(wave, orig_sr=sr, target_sr=SAMPLE_RATE) | |
| return np.ascontiguousarray(wave, dtype=np.float32), question | |