By wisecracker
IKHz_SW_OSX.py
A DEMO mono _pure_ sinewave generator using standard text mode Python 2.6.7 to at least 2.7.3.
This code is EASILY modifyable to Python version 3.x.x…
This DEMO kids level 1KHz generator is mainly for a MacBook Pro, (13 inch in my case), OSX 10.7.5 and above. See below…
It is a simple piece of testgear for the young amateur electronics enthusiast and uses pyaudio fully installed for it to work.
PyAudio pointer can be obtained from inside the comments in the code…
Macbook Pro hardware earphone plug modifications pointer inside the code too…
(I am not sure if the moderators will delete those lines from the code so search the WWW instead if they are…)
This was primarily for a MacBook Pro 13 inch, but works on at least 2 Linux flavours and Windows Vista 32 bit…
The sinewave generated is near excellent…
Enjoy finding simple solutions to often very difficult problems… Bazza, G0LCU…
(This was uploaded elsewhere and has had a lot of hits.)
Issued as GPL3…
Code:
# 1KHz_SW_OSX.py
#
# A mono _pure_ sinewave generator using STANDARD text mode Python 2.6.7 to at least 2.7.3.
# This DEMO kids level 1KHz generator is mainly for a MacBook Pro, (13 inch in my case), OSX 10.7.5 and above.
# It is another simple piece of testgear for the young amateur electronics enthusiast and
# uses pyaudio fully installed for it to work. Enjoy... ;o)
# PyAudio can be obtained from here:- http://people.csail.mit.edu/hubert/pyaudio/
#
# It also works on Windows Vista, 32 bit, on various machines with Python 2.6.x to 2.7.3.
# It also works on Debian 6.0.0 using Python 2.6.6 on an HP dv2036ea notebook.
# It also works on "Ubuntu 12.04, Python 2.7, Dell built-in soundcard", with many thanks to Hubert Pham, author
# of pyaudio itself, for testing...
#
# The hardware modifictions can be found here:-
# http://code.activestate.com/recipes/578282-for-macbook_pro-heads-only-simple-lf-audio-oscillo/?in=lang-python
#
# Ensure the sound is enabled and the volume is turned up. Use the volume control to vary the amplitude...
#
# Copy the file to a folder/drawer/directory of your choice as "1KHz_SW_OSX.py" without the quotes.
#
# Start the Python interpreter from a Terminal/CLI window.
#
# To run the sinewave generator, (depending upon the platform), just use at the ">>>" prompt:-
#
# >>> execfile("/full/path/to/1KHz_SW_OSX.py")
#
# And away you go...
#
# This code is issued as GPL3...
#
# Connect an oscilloscope to the earphone socket(s) to see the sinewave waveform(s) being generated.
#
# $VER: 1KHz_SW_OSX.py_Version_0.00.10_(C)2012_B.Walker_G0LCU.
# The only import required...
import pyaudio
# Initialise the only _variable_ in use...
n=0
# Set up a basic user screen...
# This assumes the minimum default 80x24 Terminal window size...
print("nnnnnnnnnnnnnnnnnnnnnnnnn$VER: 1KHz_SW_OSX.py_Version_0.00.10_(C)2012_B.Walker_G0LCU.n")
print("A DEMO kids level, platform independent, 1KHz _pure_ sinewave generator.nnnnnnnnnnnnnnnnnn")
# Open the stream required, mono mode only...
stream=pyaudio.PyAudio().open(format=pyaudio.paInt8,channels=1,rate=16000,output=True)
# Now generate the 1KHz signal at the speakers/headphone output for about 10 seconds...
# Sine wave, to 8 bit depth only...
for n in range(0,10000,1): stream.write("x00x30x5ax76x7fx76x5ax30x00xd0xa6x8ax80x8axa6xd0")
# Close the open _channel(s)_...
stream.close()
pyaudio.PyAudio().terminate()
# End of 1KHz_SW_OSX.py program...
# Enjoy finding simple solutions to often very difficult problems... ;o)
Source: FULL ARTICLE at The UNIX and Linux Forums
