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# Archived:How to play a tone sound using PySymbian

Aquivado: Este artigo foi arquivado, pois o conteúdo não é mais considerado relevante para se criar soluções comerciais atuais. Se você achar que este artigo ainda é importante, inclua o template {{ForArchiveReview|escreva a sua justificativa}}.

All PySymbian articles have been archived. PySymbian is no longer maintained by Nokia and is not guaranteed to work on more recent Symbian devices. It is not possible to submit apps to Nokia Store.

Tested with
Devices(s): Nokia N95, Nokia E90

Compatibility
Platform(s): S60 1st Edition, S60 2nd Edition, S60 3rd Edition

Article
Keywords: audio
Created: cyke64 (31 Mar 2007)
Last edited: hamishwillee (08 May 2013)

## Overview

This snippet shows how to play a tone in Python.

## Source code

`from struct import packfrom math import sin, piimport e32, audio  #Function for generating a tone filedef au_file(name="out.au", freq=400, length=2, A=0.5):	f = open(name, 'wb')	f.write('.snd')	f.write(pack('>5L', 24, -1, 2, 8000, 1))	T = 8000. / freq	for i in range(length * 8000):		angle = 2 * pi * i / T		val = pack('b', A * sin(angle) * 127)		f.write(val)	f.close() #Function for playing the tone filedef tone(freq=440, duration=1000, volume=0.5):	#Read the temporary file	f = open("D:\\out.au", 'wb')	f.write('.snd' + pack('>5L', 24, 8 * duration, 2, 8000, 1))	for i in range(duration * 8):		sin_i = sin(i * 2 * pi * freq / 8000) #Sine wave		f.write(pack('b', volume * 127 * sin_i))	f.close()	#Play the file	s = audio.Sound.open("D:\\out.au")	s.play()	while s.state() == 2: #Playing		e32.ao_yield()	s.close() au_file()tone()`

## Postconditions

A sound with the given properties is played.