- Thread Author
- #1
<!-- #thumb --> <p>In <a title="Hold that thought!" href="http://www.pstracks.com/pauls-posts/hold-thought/11550/">yesterday’s post</a> we learned that sample rates are a term coined from the A/D process rather than what most people assume: the D/A process. *So named because we take a sample of the incoming music 44,100 times each second in a standard CD. *Once the sample is taken we convert that number to a digital equivalent, store it on a CD and then, when we play it back, we get the same single point sample at the output of our DAC. *String all those single point samples, or steps, together and what comes out looks identical to what went in. *Voila! *Audio.</p>
<p>One of our more technically informed readers scolded me (nicely) for having propagated the myth that what comes out of a DAC looks like a stair step with each of the samples connected together to form what looks like a quasi sine wave, stepped, but the shape is intact which, he pointed out, is inaccurate. *While he is absolutely correct I struggled with even bringing this to your attention because I was afraid it might veer us off course and perhaps even worse, confuse some of you with information details not essential to gaining a broad understanding of the subject.</p>
<p>I changed my mind when I thought about it. *It cannot be that offering greater depth to information is bad. *I have to reject that and accept it is only my failing as a communicator if our community doesn’t get it. *We’re all in this together, so let’s march forward and learn all we can. *Together.</p>
<p>And to help prove my point about learning and stretching out, along comes one of the best video eye openers I’ve seen in a while, compliments of the same poster! *But I digress. *<strong>This gets juicy</strong> but we need to move forward at a reasonable pace.</p>
<p>First, the output of a DAC using PCM looks more like a series of lollipops than it is typically shown – as a stair step waveform. *Here’s more accurately what it looks like.</p>
<p><a href="http://www.pstracks.com/wp-content/uploads/2013/09/swave2.gif"><img class="alignleft size-full wp-image-11560" alt="swave2 Silly high resolution downloads" src="http://www.pstracks.com/wp-content/uploads/2013/09/swave2.gif" width="601" height="451" title="Silly high resolution downloads" /></a></p>
<p>Note how there are the individual samples and nothing connecting the samples? *This is right, the connecting of the dots handled later (and we’ll discuss that). *So, the next time you go to a magazine of anyone’s website and see the stair step waveform we’re all familiar with, you’ll know it’s not accurate – and this is.</p>
<p><strong>Now for the juice</strong>. *Along with this note I was asked to view a video on the same subject. *The video is excellent and presented by Monty Montgomery of the non-profit <a href="http://www.xiph.org/" target="_blank">XIPH Foundation</a>* an organization dedicated to making sure online media stays open and free and not swallowed up by the monopolies and oligarchies that seem to always wrest control from communities like ours. *An excellent group and purpose if ever there was one.</p>
<p>If you have a few minutes, watch the first half of this video “<a href="http://www.xiph.org/video/vid2.shtml " target="_blank">24/192 downloads are silly indeed</a>” because it explains a lot I am trying to cover and is very well done. *Worth the watch.</p>
<p>The other reason I find this fascinating and juicy is because of the title. *Here’s yet another example of a wonderfully bright, well purposed Flat Earth Society member explaining to us why what we hear isn’t real! *It’s great!</p>
<p>Watch the video – remember everything he is telling you is absolutely true. *Tomorrow I’ll explain why he’s FOS about his conclusion despite the fact his info is correct.</p>
<p>Cheers.</p>
<center><a href="http://www.pstracks.com/pauls-posts/silly-high-resolution-downloads/11559/emailpopup/" onclick="email_popup(this.href); return false;" title="Forward to a friend and help us engage more readers" rel="nofollow"><img class="WP-EmailIcon" src="http://www.pstracks.com/wp-content/plugins/wp-email/images/email.gif" alt="email Silly high resolution downloads" title="Silly high resolution downloads" /></a>*<a href="http://www.pstracks.com/pauls-posts/silly-high-resolution-downloads/11559/emailpopup/" onclick="email_popup(this.href); return false;" title="Forward to a friend and help us engage more readers" rel="nofollow">Forward to a friend and help us engage more readers</a></center><br /><!-- // MAILCHIMP SUBSCRIBE CODE --><center><a href="http://eepurl.com/eSzBY">Get new and fresh stories like this each morning by joining the folks reading Paul's Posts. Click here </a></center>
<!-- MAILCHIMP SUBSCRIBE CODE // -->
[Source: http://www.pstracks.com/pauls-posts/silly-high-resolution-downloads/11559/]
<p>One of our more technically informed readers scolded me (nicely) for having propagated the myth that what comes out of a DAC looks like a stair step with each of the samples connected together to form what looks like a quasi sine wave, stepped, but the shape is intact which, he pointed out, is inaccurate. *While he is absolutely correct I struggled with even bringing this to your attention because I was afraid it might veer us off course and perhaps even worse, confuse some of you with information details not essential to gaining a broad understanding of the subject.</p>
<p>I changed my mind when I thought about it. *It cannot be that offering greater depth to information is bad. *I have to reject that and accept it is only my failing as a communicator if our community doesn’t get it. *We’re all in this together, so let’s march forward and learn all we can. *Together.</p>
<p>And to help prove my point about learning and stretching out, along comes one of the best video eye openers I’ve seen in a while, compliments of the same poster! *But I digress. *<strong>This gets juicy</strong> but we need to move forward at a reasonable pace.</p>
<p>First, the output of a DAC using PCM looks more like a series of lollipops than it is typically shown – as a stair step waveform. *Here’s more accurately what it looks like.</p>
<p><a href="http://www.pstracks.com/wp-content/uploads/2013/09/swave2.gif"><img class="alignleft size-full wp-image-11560" alt="swave2 Silly high resolution downloads" src="http://www.pstracks.com/wp-content/uploads/2013/09/swave2.gif" width="601" height="451" title="Silly high resolution downloads" /></a></p>
<p>Note how there are the individual samples and nothing connecting the samples? *This is right, the connecting of the dots handled later (and we’ll discuss that). *So, the next time you go to a magazine of anyone’s website and see the stair step waveform we’re all familiar with, you’ll know it’s not accurate – and this is.</p>
<p><strong>Now for the juice</strong>. *Along with this note I was asked to view a video on the same subject. *The video is excellent and presented by Monty Montgomery of the non-profit <a href="http://www.xiph.org/" target="_blank">XIPH Foundation</a>* an organization dedicated to making sure online media stays open and free and not swallowed up by the monopolies and oligarchies that seem to always wrest control from communities like ours. *An excellent group and purpose if ever there was one.</p>
<p>If you have a few minutes, watch the first half of this video “<a href="http://www.xiph.org/video/vid2.shtml " target="_blank">24/192 downloads are silly indeed</a>” because it explains a lot I am trying to cover and is very well done. *Worth the watch.</p>
<p>The other reason I find this fascinating and juicy is because of the title. *Here’s yet another example of a wonderfully bright, well purposed Flat Earth Society member explaining to us why what we hear isn’t real! *It’s great!</p>
<p>Watch the video – remember everything he is telling you is absolutely true. *Tomorrow I’ll explain why he’s FOS about his conclusion despite the fact his info is correct.</p>
<p>Cheers.</p>
<center><a href="http://www.pstracks.com/pauls-posts/silly-high-resolution-downloads/11559/emailpopup/" onclick="email_popup(this.href); return false;" title="Forward to a friend and help us engage more readers" rel="nofollow"><img class="WP-EmailIcon" src="http://www.pstracks.com/wp-content/plugins/wp-email/images/email.gif" alt="email Silly high resolution downloads" title="Silly high resolution downloads" /></a>*<a href="http://www.pstracks.com/pauls-posts/silly-high-resolution-downloads/11559/emailpopup/" onclick="email_popup(this.href); return false;" title="Forward to a friend and help us engage more readers" rel="nofollow">Forward to a friend and help us engage more readers</a></center><br /><!-- // MAILCHIMP SUBSCRIBE CODE --><center><a href="http://eepurl.com/eSzBY">Get new and fresh stories like this each morning by joining the folks reading Paul's Posts. Click here </a></center>
<!-- MAILCHIMP SUBSCRIBE CODE // -->
[Source: http://www.pstracks.com/pauls-posts/silly-high-resolution-downloads/11559/]
