Tkinter Volume scale/slider doesn't set volume

Question

I have a slider to change the volume on my PC when I change the scale. However, it doesn't set the volume at the moment and I don't know why. Can someone please help me?

My code:

from tkinter import *
import tkinter as tk
from pyautogui import *
import pyautogui

window=Tk()
window.geometry("400x200")

def set_volume(val):
    set.volume(scale.get() / 100.0)

scale = Scale(window, from_=100, to=0, length=150, orient='vertical', command=set_volume)
scale.set(50)
scale.pack(padx=20, pady=20)

window.mainloop()

Can you please edit your question and clarify: What do you mean by "doesn't work"? What happens when you use it, and what did you expect to happen instead? — Robert
– Robert, Commented Oct 10 at 15:17
did you run it in console/terminal to see error messages? If you get error then show it in question (not in comments) as text (not image) — furas
– furas, Commented Oct 10 at 23:00

JRiggles · Accepted Answer · 2025-10-10 13:28:22Z

3

Looking at the documentation for pyautogui, I don't see any method called set, so set.volume is invalid. It does mention 'volumedown', 'volumemute', and 'volumeup' in the keyboard functions, which is probably what you actually want.

import tkinter as tk
import pyautogui

window = tk.Tk()
window.geometry("400x200")


def set_volume(val) -> None:
    global last_scale_value  # allow this function to modify last_scale_val
    val = int(val)  # convert val to an integer
    if val < last_scale_value:
        pyautogui.press('volumedown')
    elif val > last_scale_value:
        pyautogui.press('volumeup')
    # store the latest value for comparison
    last_scale_value = val


scale = tk.Scale(
    window,
    from_=100,
    to=0,
    length=150,
    orient='vertical',
    command=set_volume
)
scale.set(50)
scale.pack(padx=20, pady=20)
# create a variable to compare against so we know which way the volume is being adjusted
last_scale_value = int(scale.get())

window.mainloop()

One important thing to note: this is NOT directly setting your computer's volume to the current value of the scale (pyautogui can't do that as far as I can tell) - it's sending keypresses based on changes to the scale.

Your computer usually doesn't consider keyboard volume key presses as a range between 0-100, typically one keypress will change the volume by a fixed amount > 1%. Keep this in mind!

Pro Tip: you don't need both the "star import"* and the regular import statement. You can (and probably should) just do import tkinter as tk and import pyautogui.

*See here for info on why star imports are regarded as a bad idea

edited Oct 10 at 13:28

answered Oct 10 at 13:20

JRiggles

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2 Comments

Royy Oct 10 at 13:48

Thank you for your time! This kind of works. It is only letting me change like 10% up and down. So there's no way to let the slider adjust 100% of the volume?

JRiggles Oct 10 at 14:32

Yeah, that's about what I figured would happen; this will depend somewhat heavily on your PC's current volume when the app starts, because it can only adjust up and down from there. There's no way to do 0-100% volume control with pyautogui, but there may be other libraries out there for this sort of thing. That said, if you're doing thing on Windows it does usually involve some low-level library calls and stuff.

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