http://code.activestate.com/recipes/tags/pyaudio/2012-11-25T10:10:45-08:00ActiveState Code Recipes2012-11-25T10:10:45-08:00Barry Walkerhttp://code.activestate.com/recipes/users/4177147/http://code.activestate.com/recipes/578350-platform-independent-white-noise-generator/

<p style="color: grey"> Python recipe 578350 by <a href="/recipes/users/4177147/">Barry Walker</a> (<a href="/recipes/tags/apple/">apple</a>, <a href="/recipes/tags/audio/">audio</a>, <a href="/recipes/tags/demo/">demo</a>, <a href="/recipes/tags/generator/">generator</a>, <a href="/recipes/tags/linux/">linux</a>, <a href="/recipes/tags/macbook_pro/">macbook_pro</a>, <a href="/recipes/tags/noise/">noise</a>, <a href="/recipes/tags/program/">program</a>, <a href="/recipes/tags/pyaudio/">pyaudio</a>, <a href="/recipes/tags/signal/">signal</a>, <a href="/recipes/tags/sound/">sound</a>, <a href="/recipes/tags/source/">source</a>, <a href="/recipes/tags/windows/">windows</a>). </p> <p>This code is a derivative of the Pure Sinewave Generator and produces a continuous noise out of the speakers or headphone sockets.</p> <p>It is for the hobbyist to be able to generate a pseudo-random noise signal for testing with.</p> <p>It is issued as Public Domian and you may do with it as you please.</p> <p>It is very easy to convert to Python 3.x.x but as OSX only has 2.7.x and lower ATM then these are what are used...</p> <p>An installation of pyaudio IS needed for this to work; see the code for more information.</p> <p>It is near platform independent but sadly the AMIGA is not included, but hey, I have already shown how generate sound for Classic AMIGAs.</p> <p>Enjoy finding simple solutions to often very difficult problems...</p> <p>Bazza, G0LCU...</p>

2012-10-23T12:53:37-07:00Barry Walkerhttp://code.activestate.com/recipes/users/4177147/http://code.activestate.com/recipes/578301-platform-independent-1khz-pure-audio-sinewave-gene/

<p style="color: grey"> Python recipe 578301 by <a href="/recipes/users/4177147/">Barry Walker</a> (<a href="/recipes/tags/apple/">apple</a>, <a href="/recipes/tags/audio/">audio</a>, <a href="/recipes/tags/demo/">demo</a>, <a href="/recipes/tags/generator/">generator</a>, <a href="/recipes/tags/linux/">linux</a>, <a href="/recipes/tags/macbook_pro/">macbook_pro</a>, <a href="/recipes/tags/program/">program</a>, <a href="/recipes/tags/pyaudio/">pyaudio</a>, <a href="/recipes/tags/signal/">signal</a>, <a href="/recipes/tags/sinewave/">sinewave</a>, <a href="/recipes/tags/sound/">sound</a>, <a href="/recipes/tags/source/">source</a>, <a href="/recipes/tags/windows/">windows</a>). Revision 2. </p> <p>IKHz_SW_OSX.py</p> <p>A mono _pure_ sinewave generator using standard text mode Python 2.6.7 to at least 2.7.3.</p> <p>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...</p> <p>It is another simple piece of testgear for the young amateur electronics enthusiast and uses pyaudio fully installed for it to work.</p> <p>PyAudio can be obtained from here:- <a href="http://people.csail.mit.edu/hubert/pyaudio/" rel="nofollow">http://people.csail.mit.edu/hubert/pyaudio/</a></p> <p>This was primarily for a MacBook Pro, but works on at least 2 Linux flavours and Windows Vista 32 bit...</p> <p>The sinewave generated is near excellent...</p> <p>Enjoy finding simple solutions to often very difficult problems... Bazza, G0LCU...</p>

2012-10-07T14:15:55-07:00Barry Walkerhttp://code.activestate.com/recipes/users/4177147/http://code.activestate.com/recipes/578282-for-macbook_pro-heads-only-simple-lf-audio-oscillo/

<p style="color: grey"> Python recipe 578282 by <a href="/recipes/users/4177147/">Barry Walker</a> (<a href="/recipes/tags/anim/">anim</a>, <a href="/recipes/tags/apple/">apple</a>, <a href="/recipes/tags/audio/">audio</a>, <a href="/recipes/tags/demo/">demo</a>, <a href="/recipes/tags/display/">display</a>, <a href="/recipes/tags/macbook_pro/">macbook_pro</a>, <a href="/recipes/tags/oscilloscope/">oscilloscope</a>, <a href="/recipes/tags/pyaudio/">pyaudio</a>, <a href="/recipes/tags/scope/">scope</a>, <a href="/recipes/tags/sound/">sound</a>). </p> <p>For MacBook_Pro-Heads Only. Simple LF Audio Oscilloscope Using Standard Text Mode Python.</p> <p>SimpleScope_OSX.py</p> <p>Do you remember this upload from myself on 26-06-2011...</p> <p><a href="http://code.activestate.com/recipes/577771-simple-lf-audio-oscilloscope-using-standard-text-m/?in=user-4177147" rel="nofollow">http://code.activestate.com/recipes/577771-simple-lf-audio-oscilloscope-using-standard-text-m/?in=user-4177147</a></p> <p>Well here is an August 2012 vintage MacBook Pro 13 inch version of it for OSX 10.7.5...</p> <p>This is proof of concept code for a kids level project I am doing for a MacBook Pro, 13 inch, OSX 10.7.5. A DEMO to show how to display a waveform using standard text mode Python. "pyaudio" must be installed for this to work. Levels are set using the standard audio mixers, (System Preferences -> Sound).</p> <p>Just whistle a signal of say 300Hz to 3KHz, (normal voice spectrum), using say, the internal mic, and watch a waveform appear inside the X-Y graticule.</p> <p>Read the code for more information.</p> <p>$VER: SimpleScope_OSX.py_Version_0.00.10_(C)2012_B.Walker_G0LCU.</p> <p>This code is GPL2, but, the hardware information is Public Domain.</p> <p>(I am looking into including Windows and Linux variants too using pyaudio to access the sound system.)</p> <p>Enjoy finding simple solutions to often very difficult problems.</p> <p>Bazza, G0LCU...</p>