http://code.activestate.com/recipes/tags/oscilloscope-apple/2013-06-19T19:06:50-07:00ActiveState Code Recipes2013-06-19T19:06:50-07:00Barry Walkerhttp://code.activestate.com/recipes/users/4177147/http://code.activestate.com/recipes/578570-bash-script-for-an-oscilloscope/

<p style="color: grey"> Bash recipe 578570 by <a href="/recipes/users/4177147/">Barry Walker</a> (<a href="/recipes/tags/anim/">anim</a>, <a href="/recipes/tags/audio/">audio</a>, <a href="/recipes/tags/audioscope/">audioscope</a>, <a href="/recipes/tags/bash/">bash</a>, <a href="/recipes/tags/oscilloscope/">oscilloscope</a>, <a href="/recipes/tags/scope/">scope</a>, <a href="/recipes/tags/script/">script</a>, <a href="/recipes/tags/sound_exchange/">sound_exchange</a>, <a href="/recipes/tags/sox/">sox</a>, <a href="/recipes/tags/terminal/">terminal</a>). </p> <p>This code is the latest as of 19-06-2013. It is an AudioScope designed around a Macbook Pro 13" of which only has ONE microphone input. It works under Linux variants too. Read the code for much more info.</p> <p>It was my way of learning Bash scripting.</p> <p>It is resident here at this site:-</p> <p><a href="http://www.unix.com/shell-programming-scripting/212939-start-simple-audio-scope-shell-script.html" rel="nofollow">http://www.unix.com/shell-programming-scripting/212939-start-simple-audio-scope-shell-script.html</a></p> <p>It started off as a fun idea and is now becoming a very serious project.</p> <p>As it stands this is fully working but it is uncalibrated and this is where it will stay on this site.</p> <p>As the above site is the host then all future uploads will be there...</p> <p>To do list...</p> <p>DC input. [1] DC polarity. [1] 2 more Internal sync modes. External triggering. Zoom facility - if possible in text mode. Vertical calibration. [2] Frequency measurement. {3] (Others.)</p> <p>[1] I have simple HW built as an idea but yet to prove it... [2] Preliminary HW built but not yet used. Calibration SW and circuit(s) to be built into script as it progresses. [3] I already have a working script but not completely satisfied at it at this point...</p> <p>I am noing to say much else except that it has already been given a 5 star rating on the above UNIX site...</p> <p>As it stands this code is entirely Public Domian and you may do with it as you please...</p> <p>Enjoy something completely different using Bash scripting...</p> <p>Finally the code defaults to a DEMO mode which requires no HW access at all but everything is still functional...</p> <p>__Thoroughly__ read the code for more information...</p> <p>As a circuit is inside the script then it is best viewed in plan text mode.</p> <p>Bazza, G0LCU.</p>

2011-06-26T21:42:55-07:00Barry Walkerhttp://code.activestate.com/recipes/users/4177147/http://code.activestate.com/recipes/577771-simple-lf-audio-oscilloscope-using-standard-text-m/

<p style="color: grey"> Python recipe 577771 by <a href="/recipes/users/4177147/">Barry Walker</a> (<a href="/recipes/tags/anim/">anim</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/linux/">linux</a>, <a href="/recipes/tags/oscilloscope/">oscilloscope</a>, <a href="/recipes/tags/scope/">scope</a>, <a href="/recipes/tags/sound/">sound</a>). </p> <p>A Linux DEMO to show how to display a waveform using standard text mode Python. The audio device /dev/dsp is used and must be available. Levels are set using the standard audio mixers.</p> <p>Just feed a signal of say 300Hz to 3KHz, (normal voice spectrum), using say, the internal mic, and watch the waveform appear inside the X-Y graticule.</p> <p>This method WILL be used for a program proper and may be uploaded to this site in the future.</p> <p>Read the code for more information.</p> <p>This code is Public Domain and you may do with it as you please.</p> <p>Enjoy finding simple solutions to often very difficult problems.</p>

2011-04-07T17:17:57-07:00Barry Walkerhttp://code.activestate.com/recipes/users/4177147/http://code.activestate.com/recipes/577644-simple-lf-audio-oscilloscope-using-standard-python/

<p style="color: grey"> Python recipe 577644 by <a href="/recipes/users/4177147/">Barry Walker</a> (<a href="/recipes/tags/anim/">anim</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/linux/">linux</a>, <a href="/recipes/tags/oscilloscope/">oscilloscope</a>, <a href="/recipes/tags/scope/">scope</a>, <a href="/recipes/tags/sound/">sound</a>). </p> <p>AudioScope.py</p> <p>I think this might be a first for both Python.</p> <p>Initially uploaded to LXF, now also here under the MIT licence.</p> <p>I am building a kids level seismometer and wanted to use standard Python inside Linux.</p> <p>This DEMO code was my starter idea and looks as though using standard ASCII only might just work a real treat.</p> <p>I've issued it to LXF under the MIT licence for future reasons.</p> <p>It doesn't look much on screen except that the waveform(s) shown is/are a basic visual, electrical representation of your voice. ;o)</p> <p>It is possible to link the earphone socket on this notebook to the mic input and start the Audio Function Generator, elsewhere in this site, in a separate Python terminal and see those waveforms inside the AudioScope.py`s own Python terminal.</p> <p>This grabs a 1 second 8KB burst, and then displays it onto the Python terminal. The timebase, amplitude, trigger, single shot and others are not included but the main grab and display using /dev/dsp is shown. This can be made platform independent by changing the /dev/dsp to something external like the Arduino Dev Board. This uses STANDARD Python 2.5.x and later and tested on PCLinuxOS 2009 and Debian 6.0.0.</p> <p>Enjoy finding simple solutions to often very difficult problems.</p> <p>Bazza, G0LCU.</p>