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                      <p><b><font face="Arial, Helvetica, sans-serif" color="#0000FF"><i><a href="../../2.1/uc/index.html"><font color="#904C10" size="3">Sounds 
                        From All Over</font></a></i></font></b><br>

                      
                      <div align="right"> <font face="Arial, Helvetica, sans-serif" size="-1">By 
                        <a href="mailto:jsimpson@ravensoft.com">Jake Simpson</a></font></div>
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                  <td width="45%" align="right" valign="top"> 
                    <h5 align="right"><b><font face="Arial, Helvetica, sans-serif" color="#00025E">Vol. 
                      2, Issue 4&nbsp; <br>
                      November 29, 1999&nbsp; </font></b></h5>
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              <loonystart> 
              <p align="right">&nbsp;</p>
              
            <p align="left"> <font face="Arial, Helvetica, sans-serif">When you 
              think of 'sound card acceleration', its hard not to think of it 
              in video card terms, and to a greater degree this is so. Video cards 
              take pixel data, perform operations on that data like interpolation, 
              and stuff these transformed pixels out to a canvas that the game 
              player sees on the screen. Similarly, sound cards take raw sample 
              data and perform operations on that data, mix it together and then 
              send the result to the speakers. Some of these operations include 
              Echo, reflections, Doppler shifts, pitch bending and so on. The 
              mixer mixes samples processed by the card, as well as outside analog 
              inputs, like the sound from your CD-ROM drive or mics that you plug 
              in. There's other stuff the card does, like MIDI playback, but we 
              don't need to get into that for the purposes of this document.</font></p>
            <p align="left"></p>
            <p align="left"><font face="Arial, Helvetica, sans-serif">The cool 
              part of the 3D sound card is what the card does with 3D sounds. 
              The SBLive! can handle up to 32 concurrent 3D sounds (the difference 
              between a 3D sound and a 2D sound is that a 3D sound has a 3D origin, 
              is spatialized for 4 speakers, and has a ton of clever stuff done 
              it after the sound is submitted to the card), while the A3D Vortex 
              2 chip can handle 16. On the A3D card, once a sound is submitted, 
              it can work out all the reflections for the sound inside a room 
              inside of the dedicated on card chip, which is cool, along with 
              all the filters required for the sound - like doppler effects, orientation 
              effects and so on. The SBLive! contains a programmable DSP that 
              works out the reverb for a sound, plus all the same sort of filters, 
              just done in a different fashion.</font></p>
            <p align="left"></p>
            <p align="left"><font face="Arial, Helvetica, sans-serif">Both the 
              cards are pretty much the same speed - the real differences are 
              in what occurs physically on the card once the sound gets there. 
              There are some differences in approach, and in the software that 
              gets the sound to the card, but by and large it would be hard to 
              pick one over the other. As a developer, both have their good sides, 
              and their bad sides. It's very much a &#145;swings and roundabouts&#146; 
              kind of thing as to which is superior. The bottom line really is 
              &#145;how do they sound?&#146; Well, they both sound really good 
              to me, Time will tell on this one...</font></p>
            <p align="left"></p>
            <p align="left"><font face="Arial, Helvetica, sans-serif">Of course 
              the one thing that Games could really use that&#146;s not here is 
              .mp3 hardware decompression. We know we want it, so pretty please 
              manufacturers, can we have it? :)</font></p>
            <p align="left">&nbsp;</p>
            <p align="right"><font face="Arial, Helvetica, sans-serif" size="2"><i>- 
              Jake Simpson is a code monkey for Raven Software. He's badass.</i></font></p>
            <p align="left"></p>
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            <p align="left"><font face="Arial, Helvetica, sans-serif"><br></loonystart> 
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<p><i><font face="Arial, Helvetica, sans-serif" size="-2">Credits: Illustration 
  &copy; 1999 Dhabih Eng. This article is &copy; 1999 Jake Simpson. All other 
  content is &copy; 1999 loonyboi productions. Unauthorized reproduction is prohibited. 
  So don't do it, or we'll make your ears bleed.</font></i></p>
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