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	<title>Comments on: Arduino Sound Part 2: Hello World</title>
	<atom:link href="http://www.uchobby.com/index.php/2007/11/14/arduino-sound-part-2-hello-world/feed/" rel="self" type="application/rss+xml" />
	<link>http://www.uchobby.com/index.php/2007/11/14/arduino-sound-part-2-hello-world/</link>
	<description>Microcontrollers Electronics Hobby</description>
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	<item>
		<title>By: dfowler</title>
		<link>http://www.uchobby.com/index.php/2007/11/14/arduino-sound-part-2-hello-world/comment-page-1/#comment-827</link>
		<dc:creator>dfowler</dc:creator>
		<pubDate>Wed, 16 Apr 2008 22:00:55 +0000</pubDate>
		<guid isPermaLink="false">http://www.uchobby.com/index.php/2007/11/14/arduino-sound-part-2-hello-world/#comment-827</guid>
		<description>DrLucas,

The code and methods described in part 3 will generate the musical notes like a piano. There is no envelope control so the notes are not as nice but this maybe what you are looking for.</description>
		<content:encoded><![CDATA[<p>DrLucas,</p>
<p>The code and methods described in part 3 will generate the musical notes like a piano. There is no envelope control so the notes are not as nice but this maybe what you are looking for.</p>
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	</item>
	<item>
		<title>By: DrLucas</title>
		<link>http://www.uchobby.com/index.php/2007/11/14/arduino-sound-part-2-hello-world/comment-page-1/#comment-826</link>
		<dc:creator>DrLucas</dc:creator>
		<pubDate>Wed, 16 Apr 2008 19:31:04 +0000</pubDate>
		<guid isPermaLink="false">http://www.uchobby.com/index.php/2007/11/14/arduino-sound-part-2-hello-world/#comment-826</guid>
		<description>I know it has been a while since this was made, but do you know of a way to generate specific tones? such as the keys to a piano?</description>
		<content:encoded><![CDATA[<p>I know it has been a while since this was made, but do you know of a way to generate specific tones? such as the keys to a piano?</p>
]]></content:encoded>
	</item>
	<item>
		<title>By: dfowler</title>
		<link>http://www.uchobby.com/index.php/2007/11/14/arduino-sound-part-2-hello-world/comment-page-1/#comment-825</link>
		<dc:creator>dfowler</dc:creator>
		<pubDate>Fri, 16 Nov 2007 06:42:12 +0000</pubDate>
		<guid isPermaLink="false">http://www.uchobby.com/index.php/2007/11/14/arduino-sound-part-2-hello-world/#comment-825</guid>
		<description>Jim,

Send the code to me via email at dfowler@uCHobby. I will find a way to get it into a comment for you. At the very least, I can add it to the end of this article with credit given to you.

You might consider submitting it along with a description as an article to uCHobby. Doing so can get you an Arduino kit.</description>
		<content:encoded><![CDATA[<p>Jim,</p>
<p>Send the code to me via email at dfowler@uCHobby. I will find a way to get it into a comment for you. At the very least, I can add it to the end of this article with credit given to you.</p>
<p>You might consider submitting it along with a description as an article to uCHobby. Doing so can get you an Arduino kit.</p>
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	</item>
	<item>
		<title>By: Jim Thomas</title>
		<link>http://www.uchobby.com/index.php/2007/11/14/arduino-sound-part-2-hello-world/comment-page-1/#comment-824</link>
		<dc:creator>Jim Thomas</dc:creator>
		<pubDate>Fri, 16 Nov 2007 05:39:25 +0000</pubDate>
		<guid isPermaLink="false">http://www.uchobby.com/index.php/2007/11/14/arduino-sound-part-2-hello-world/#comment-824</guid>
		<description>guess you can&#039;t post code in the comments.</description>
		<content:encoded><![CDATA[<p>guess you can&#8217;t post code in the comments.</p>
]]></content:encoded>
	</item>
	<item>
		<title>By: Jim Thomas</title>
		<link>http://www.uchobby.com/index.php/2007/11/14/arduino-sound-part-2-hello-world/comment-page-1/#comment-823</link>
		<dc:creator>Jim Thomas</dc:creator>
		<pubDate>Fri, 16 Nov 2007 05:38:53 +0000</pubDate>
		<guid isPermaLink="false">http://www.uchobby.com/index.php/2007/11/14/arduino-sound-part-2-hello-world/#comment-823</guid>
		<description>...continued
for(i=0; i</description>
		<content:encoded><![CDATA[<p>&#8230;continued<br />
for(i=0; i</p>
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	</item>
	<item>
		<title>By: Jim Thomas</title>
		<link>http://www.uchobby.com/index.php/2007/11/14/arduino-sound-part-2-hello-world/comment-page-1/#comment-822</link>
		<dc:creator>Jim Thomas</dc:creator>
		<pubDate>Fri, 16 Nov 2007 04:59:53 +0000</pubDate>
		<guid isPermaLink="false">http://www.uchobby.com/index.php/2007/11/14/arduino-sound-part-2-hello-world/#comment-822</guid>
		<description>I&#039;ll add another voice to PWM, but with a twist.  Earlier this year I used PWM to generate an analog output using a digital I/O pin on an AVR.  I had very little capacitance to work with on this line, which made the cutoff frequency too high even when the bits were flying as fast as I could make them go.  My first stab looked something like this:

for(i=0; i</description>
		<content:encoded><![CDATA[<p>I&#8217;ll add another voice to PWM, but with a twist.  Earlier this year I used PWM to generate an analog output using a digital I/O pin on an AVR.  I had very little capacitance to work with on this line, which made the cutoff frequency too high even when the bits were flying as fast as I could make them go.  My first stab looked something like this:</p>
<p>for(i=0; i</p>
]]></content:encoded>
	</item>
	<item>
		<title>By: Trumpetto</title>
		<link>http://www.uchobby.com/index.php/2007/11/14/arduino-sound-part-2-hello-world/comment-page-1/#comment-821</link>
		<dc:creator>Trumpetto</dc:creator>
		<pubDate>Thu, 15 Nov 2007 09:20:59 +0000</pubDate>
		<guid isPermaLink="false">http://www.uchobby.com/index.php/2007/11/14/arduino-sound-part-2-hello-world/#comment-821</guid>
		<description>Hi dfowler,
Good work! I searched for a small synth solution for my arduino based electronic trumpet and found this nice list a while ago;
http://jonbro.tk/blog/2007/09/23/single-chip-synths/</description>
		<content:encoded><![CDATA[<p>Hi dfowler,<br />
Good work! I searched for a small synth solution for my arduino based electronic trumpet and found this nice list a while ago;<br />
<a href="http://jonbro.tk/blog/2007/09/23/single-chip-synths/" rel="nofollow">http://jonbro.tk/blog/2007/09/23/single-chip-synths/</a></p>
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	</item>
	<item>
		<title>By: deastman</title>
		<link>http://www.uchobby.com/index.php/2007/11/14/arduino-sound-part-2-hello-world/comment-page-1/#comment-820</link>
		<dc:creator>deastman</dc:creator>
		<pubDate>Thu, 15 Nov 2007 08:17:36 +0000</pubDate>
		<guid isPermaLink="false">http://www.uchobby.com/index.php/2007/11/14/arduino-sound-part-2-hello-world/#comment-820</guid>
		<description>Thank you for writing these articles!  I&#039;m currently looking into using the Arduino to generate 0-10v control voltage signals to interface with my modular synthesizer.  As far as I can tell, a DAC would be required to get a sufficient level of precision (only 256 values available from a digital out).  I&#039;m hoping you&#039;ll address this in a future installment.  Thanks again :)</description>
		<content:encoded><![CDATA[<p>Thank you for writing these articles!  I&#8217;m currently looking into using the Arduino to generate 0-10v control voltage signals to interface with my modular synthesizer.  As far as I can tell, a DAC would be required to get a sufficient level of precision (only 256 values available from a digital out).  I&#8217;m hoping you&#8217;ll address this in a future installment.  Thanks again <img src='http://www.uchobby.com/wp-includes/images/smilies/icon_smile.gif' alt=':)' class='wp-smiley' /> </p>
]]></content:encoded>
	</item>
	<item>
		<title>By: Ryan</title>
		<link>http://www.uchobby.com/index.php/2007/11/14/arduino-sound-part-2-hello-world/comment-page-1/#comment-819</link>
		<dc:creator>Ryan</dc:creator>
		<pubDate>Wed, 14 Nov 2007 21:30:12 +0000</pubDate>
		<guid isPermaLink="false">http://www.uchobby.com/index.php/2007/11/14/arduino-sound-part-2-hello-world/#comment-819</guid>
		<description>oops it helps if i read everyone else first (sorry)</description>
		<content:encoded><![CDATA[<p>oops it helps if i read everyone else first (sorry)</p>
]]></content:encoded>
	</item>
	<item>
		<title>By: Ryan</title>
		<link>http://www.uchobby.com/index.php/2007/11/14/arduino-sound-part-2-hello-world/comment-page-1/#comment-818</link>
		<dc:creator>Ryan</dc:creator>
		<pubDate>Wed, 14 Nov 2007 21:26:12 +0000</pubDate>
		<guid isPermaLink="false">http://www.uchobby.com/index.php/2007/11/14/arduino-sound-part-2-hello-world/#comment-818</guid>
		<description>Have you considered using pulse width modulation to get a nice sine wave form?... if the thing can output fast enough it might work.</description>
		<content:encoded><![CDATA[<p>Have you considered using pulse width modulation to get a nice sine wave form?&#8230; if the thing can output fast enough it might work.</p>
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