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Streamlit

Streamlit is a powerful python library for creating interactive web apps.

Features:

  • Simple and Pythonic: Write beautiful, easy-to-read code.
  • Fast, interactive prototyping: Let others interact with your data and provide feedback quickly.
  • Live editing: See your app update instantly as you edit your script.
  • Open-source and free: Join a vibrant community and contribute to Streamlit's future.

Installation⚑

Open a terminal and run:

$ pip install streamlit
$ streamlit hello

If this opens the Streamlit Hello app in your browser, you're all set! If not, head over to their docs for specific installs.

The app features a bunch of examples of what you can do with Streamlit. Jump to the quickstart section to understand how that all works.

Usage⚑

A little example⚑

Create a new file streamlit_app.py with the following code: 

import streamlit as st
x = st.slider("Select a value")
st.write(x, "squared is", x * x)

Now run it to open the app! 

$ streamlit run streamlit_app.py

Record audio from the microphone⚑

There are many components that are able to do this:

I like the first one the most because it has a clean interface and is maintained. I'd use the second if you wanted to automatically stop recording once there is a silence.

streamlit-audiorecorder⚑

Installation⚑
pip install streamlit-audiorecorder

This package uses ffmpeg, so it should be installed for this audiorecorder to work properly.

Usage⚑
import streamlit as st
from audiorecorder import audiorecorder

st.title("Audio Recorder")
audio = audiorecorder("Click to record", "Click to stop recording")

if len(audio) > 0:
    # To play audio in frontend:
    st.audio(audio.export().read())  

    # To save audio to a file, use pydub export method:
    audio.export("audio.wav", format="wav")

    # To get audio properties, use pydub AudioSegment properties:
    st.write(f"Frame rate: {audio.frame_rate}, Frame width: {audio.frame_width}, Duration: {audio.duration_seconds} seconds")

Where the signature of the audiorecorder object is:

audiorecorder(start_prompt="Start recording", stop_prompt="Stop recording", pause_prompt="", show_visualizer=True, key=None):
  • The prompt parameters are self-explanatory.
  • The optional `key`` parameter is used internally by Streamlit to properly distinguish multiple audiorecorders on the page.
  • The show_visualizer`` parameter is a boolean that determines whether to show live audio visualization while recording. If set toFalse``, the text "recording" is displayed. It is used only when all prompts are empty strings.

Reference⚑