Generate Tone

Runnable examples for the frozen Gradio Lite 5.45.0 browser runtime.

Generate an audio waveform from note, octave, and duration controls.

This coding playground creates a NumPy waveform and returns its sample rate and samples to a Gradio audio component. Click Run, choose a note and duration, then submit to play the tone.

import numpy as np
import gradio as gr

notes = ["C", "C#", "D", "D#", "E", "F", "F#", "G", "G#", "A", "A#", "B"]


def generate_tone(note, octave, duration):
    sr = 48000
    a4_freq, tones_from_a4 = 440, 12 * (octave - 4) + (note - 9)
    frequency = a4_freq * 2 ** (tones_from_a4 / 12)
    duration = int(duration)
    audio = np.linspace(0, duration, duration * sr)
    audio = (20000 * np.sin(audio * (2 * np.pi * frequency))).astype(np.int16)
    return sr, audio


demo = gr.Interface(
    generate_tone,
    [
        gr.Dropdown(notes, type="index"),
        gr.Slider(4, 6, step=1),
        gr.Textbox(value="1", label="Duration in seconds"),
    ],
    "audio",
    flagging_mode="never",
)

demo.launch()

import numpy as np import gradio as gr notes = ["C", "C#", "D", "D#", "E", "F", "F#", "G", "G#", "A", "A#", "B"] def generate_tone(note, octave, duration): sr = 48000 a4_freq, tones_from_a4 = 440, 12 * (octave - 4) + (note - 9) frequency = a4_freq * 2 ** (tones_from_a4 / 12) duration = int(duration) audio = np.linspace(0, duration, duration * sr) audio = (20000 * np.sin(audio * (2 * np.pi * frequency))).astype(np.int16) return sr, audio demo = gr.Interface( generate_tone, [ gr.Dropdown(notes, type="index"), gr.Slider(4, 6, step=1), gr.Textbox(value="1", label="Duration in seconds"), ], "audio", flagging_mode="never", ) demo.launch()