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<!DOCTYPE html>
<!--[if IE 8 ]><html class="ie ie8" lang="en"> <![endif]-->
<!--[if IE 9 ]><html class="ie ie9" lang="en"> <![endif]-->
<!--[if (gte IE 9)|!(IE)]><!--><html lang="en"> <!--<![endif]-->
<head>
<meta charset="utf-8">
<title>freeDSP | An Open-Source Low-Budget Audio DSP</title>
<meta name="description" content="freeDSP | An Open-Source Low-Budget Audio DSP">
<meta name="author" content="Sebastian Merchel">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
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</head>
<body id="section-home" data-spy="scroll" data-target="#main-nav" data-offset="72">
<!--////////// 3-LEVEL PARALLAX BACKGROUND - images can be changed in CSS //////////-->
<div id="parallax-1" class="parallax"></div>
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<div id="parallax-3" class="parallax"></div>
<!--/////////// HEADER SECTION //////////-->
<header id="morph-header" class="morph-header-large">
<nav role="navigation">
<div class="container">
<!-- Brand and toggle get grouped for better mobile display -->
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">
<span data-icon="" aria-hidden="true"></span>
</button>
<a class="navbar-brand" href="index.html"><img src="images/freeDSP_LOGO_white.png" alt=""></a>
</div>
<div id="main-nav" class="collapse navbar-collapse navbar-collapse">
<ul class="nav navbar-nav fancy-nav navbar-right">
<!--////////// NAVIGATION MENU //////////-->
<li class="active"><a href="#section-home"><span data-hover="Features">Features</span></a></li>
<li><a href="#section-tour"><span data-hover="Start">Start</span></a></li>
<li><a href="#section-overview"><span data-hover="Boards">Boards</span></a></li>
<li><a href="#section-applications"><span data-hover="Applications">Appplications</span></a></li>
<li><a href="#section-contact"><span data-hover="Contact">Contact</span></a></li>
</ul>
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</nav>
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<!--////////// SLIDER SECTION ////////// -->
<section id="section-slider">
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<!-- ////////// FLEX SLIDER STARTS HERE ////////// -->
<div id="main-slider" class="flexslider">
<ul class="slides">
<li>
<div class="col-md-6 col-md-offset-1 slider-text">
<h1 class="animated bounceInDown">A DIY audio dsp project.</h1>
<p class="animated bounceInDown">The freeDSP is an open-source digital signal processor family for the do-it-yourself community. The applications range from active loudspeaker concepts (digital crossovers, bass enhancement, ...) and room equalization over advanced musical effect processors to car audio signal processing. </p>
</div><!-- /slider-text -->
<div class="col-md-4">
<div style="margin-bottom: 96px;"></div>
<img class="img-responsive animated fadeInDownBig" src="images/freeDSP_1_0_side_small.png" alt="" title="" />
</div>
</li>
<li>
<div class="col-md-4 col-md-offset-1" style="padding-top: 100px;">
<img class="img-responsive animated flipInY" src="images/SigmaStudioScreenShot.png" alt="" title="" />
</div>
<div class="col-md-5 col-md-offset-1 slider-text">
<h1 class="animated bounceInDown">Easy programmability with SigmaStudio.</h1>
<p class="animated bounceInDown">No advanced coding skills are necessary. The freeDSP works with a graphical development environment. The programming model is function-block based. Just drag-and-drop some processing blocks and virtual cables - and you are ready to go! The Windows based software can be downloaded from Analog Devices free of charge.
</p>
<!--<a class="btn btn-primary btn-large animated bounceInRight" href="#section-tour">Take the Tour!</a>-->
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<li>
<div class="col-md-5 col-md-offset-1 slider-text">
<h1 class="animated bounceInDown">It's open-source.</h1>
<p class="animated bounceInDown">All freeDSP boards are published under a creative commons license (CC-BY-SA). It allows the unrestricted use and modification of the module. We would be happy if you join the team and improve or extend the freeDSP family. We really like the open hardware idea. :-)</p>
<!--<a class="btn btn-primary btn-large animated bounceInLeft" href="..." target="_blank">Link (external link)</a>-->
</div><!-- /slider-text -->
<div class="col-md-4" style="padding-top: 70px;">
<img class="img-responsive animated bounceInRight" src="images/open-source-hardware-logo.svg" alt="" title="" />
</div>
</li>
</ul>
</div><!-- /#main-slider -->
</div><!-- /row -->
</div><!-- /container -->
</section>
<!--////////// FEATURES SECTION //////////-->
<section id="features">
<div class="container">
<div class="row">
<p class="lead">Welcome to the freeDSP website. Here you can find instructions, examples, all necessary components and the latest freeDSP circuit board designs.
</p>
</div><!-- /row -->
<hr>
<div class="row">
<!--<div class="col-md-4 feature">
<span data-icon="" aria-hidden="true"></span>
<h2>Low Budget</h2><p>The costs for a freeDSP are circuit board manufacturing and electric components (50 €). It can be soldered by hand. Soldering experience required! The most difficult part is the actual DSP chip <a href="http://www.analog.com/en/audiovideo-products/audio-signal-processors/adau1701/products/product.html">ADAU1701</a>. However, we will ship the freeDSP board with this chip already assambled.</p>
</div><!-- /feature -->
<div class="col-md-4 feature">
<span data-icon="" aria-hidden="true"></span>
<h2>Quick Links</h2><p>
<a href="http://www.diyaudio.com/forums/digital-line-level/285260-freedsp-main-thread.html" target="_blank">freeDSP diyAudio forum</a><br>
<a href="https://github.com/freeDSP" target="_blank">freeDSP GitHub repository</a><br>
<a href="https://github.com/freeDSP/WIKI-AND-GENERAL-TOPICS/wiki" target="_blank">freeDSP design guidelines</a><br><br>
<a href="https://wiki.analog.com/resources/tools-software/sigmastudio?rev=1447935767" target="_blank">SigmaStudio documentation</a><br>
<a href="http://ez.analog.com/community/dsp/sigmadsp" target="_blank">SigmaStudio forum</a>
</p>
</div><!-- /feature -->
<div class="col-md-4 feature">
<span data-icon="" aria-hidden="true"></span>
<h2>Audio Processing</h2><p>
Graphic & parametric EQs<br>
Mixing<br>
Phase shifting<br>
Dynamics processing<br>
IIR / FIR filtering<br>
Low-level DSP functions<br>
Real time tuning<br>
...
</p>
</div><!-- /feature -->
<div class="col-md-4 feature">
<span data-icon="" aria-hidden="true"></span>
<h2>Applications</h2><p>
Digital crossovers<br>
Digital room correction<br>
Subwoofer integration<br>
Musical effect units<br>
System equalization<br>
Delay compensation<br>
Bass enhancement<br>
...
</div><!-- /feature -->
</div><!-- /row -->
</div><!-- /container -->
</section>
<!--////////// TOUR SECTION //////////-->
<section id="section-tour">
<div class="container">
<div class="row">
<h1 class="text-center">Getting started!</h1>
<ul class="media-list">
<!--///// STEP 1 ///// -->
<li class="media col-md-12" id="step-1">
<div class="tour-step-icon">1</div>
<span class="tour-line-half"></span>
<div class="row">
<div class="col-md-1">
<span class="tour-line-vert"></span>
</div>
<div class="tour-step-container">
<div class="col-md-2 icon"><span data-icon="" aria-hidden="true"></span></div>
<div class="media-body col-md-8">
<h3 class="media-heading">Order board and parts...</h3>
<p class="media-desc">Select your <a href="#section-overview">freeDSP main board from the overview table</a> below. Additionally, you will need a programmer. We recommend building the <a href="https://docs.google.com/document/d/1rKkCl3gyePwX15c3sjEIKP6Bb7CO77hgRAXtbYz5hA0/edit?usp=sharing" target="_blank">freeUSBi programmer</a> for real time tuning of your programms. Download the Gerber files and manufacture the board. You have to order all necessary parts yourself. We do not offer centralized buying at the moment!
<!--You can build the freeUSBi programmer or buy the original <a href="http://www.analog.com/en/design-center/evaluation-hardware-and-software/evaluation-boards-kits/eval-adusb2ebz.html" target="_blank">USBi programmer</a> (80 $, real time tuning) or use an Arduino to control your DSP board.">-->
</p>
</div><!-- /media-body -->
</div><!-- /tour-step-container -->
</div><!-- /row -->
</li>
<!-- ///// STEP 2 ///// -->
<li class="media col-md-12" id="step-2">
<div class="tour-step-icon">2</div>
<span class="tour-line-full"></span>
<div class="row">
<div class="col-md-1 col-md-push-11">
<span class="tour-line-vert pull-right"></span>
</div>
<div class="tour-step-container">
<div class="col-md-2 col-md-push-8 icon"><span data-icon="" aria-hidden="true"></span></div>
<div class="media-body col-md-8 col-md-pull-2">
<h3 class="media-heading">Solder / Assemble...</h3>
<p class="media-desc"><!--If you ordered a preassembled freeDSP kit, all unsoldered components are through hole, so they can be soldered with basic soldering knowledge.-->You can find the part list and the assembly print for soldering in the table below (e.g., in the corresponding getting started guides). Some soldering experience is required for SMD components. Hopefully, there will be preassamled freeDSP kits again in the future. :-)<!--In this case, all unsoldered components might be through hole, so they can be soldered with basic soldering knowledge.--></p>
</div><!-- /media-body -->
</div><!-- /tour-step-container -->
</div><!-- /row -->
</li>
<!--///// STEP 3 ///// -->
<li class="media col-md-12" id="step-3">
<div class="tour-step-icon">3</div>
<span class="tour-line-full"></span>
<div class="row">
<div class="col-md-1">
<span class="tour-line-vert"></span>
</div>
<div class="tour-step-container">
<div class="col-md-2 icon final"><span data-icon="" aria-hidden="true"></span></div>
<div class="media-body col-md-8">
<h3 class="media-heading">Do the programming...</h3><!--Little or no DSP coding experience is required to quickly get up and running. -->
<p class="media-desc">The graphical development environment SigmaStudio can be used for easy programming. It can be downloaded for free (account needed) at the <a href="http://www.analog.com/en/design-center/processors-and-dsp/evaluation-and-development-software/ss_sigst_02.html" target="_blank">SigmaStudio</a> website. Please have a look at the getting started guides to get your freeDSP up and running with SigmaStudio. For further questions please refer to the <a href="https://wiki.analog.com/resources/tools-software/sigmastudio?rev=1447935767" target="_blank">SigmaStudio documentation</a> and <a href="http://ez.analog.com/community/dsp/sigmadsp" target="_blank"> forum</a>.</p>
</div><!-- /media-body -->
</div><!-- /tour-step-container -->
</div><!-- /row -->
</li>
<!-- ///// TOUR END ///// -->
<li class="media last-step col-md-12" id="tour-end">
<div class="tour-step-icon final"><span data-icon="" aria-hidden="true"></span></div>
<span class="tour-line-half"></span>
<p class="lead launch col-md-5 col-md-push-7">... enjoy!</p>
</li>
</ul>
</div><!-- /row -->
</div><!-- /container -->
</section>
<!--////////// OVERVIEW SECTION //////////-->
<section id="section-overview">
<div class="container">
<h1 class="text-center">freeDSP family overview</h1>
<div class="row">
<div class="table-responsive">
<table summary="This table gives an overview of all existing freeDSP boards." class="table table-hover">
<!--<caption class="text-center"><h3>Main boards</h3></caption>-->
<thead>
<tr class="removeTableBorderTopAndBottom">
<td colspan="10" class="text-center"><br><h3>Main boards</h3></td>
</tr>
<tr>
<th>freeDSP</th>
<th>In</th>
<th>Out</th>
<th>Status</th>
<th>Source</th>
<th>Parts</th>
<th>Documentation</th>
<th width="200px">Compatibility</th> <!-- FIXED WIDTH ??? -->
<th>Notes</th>
<th>Cost</th>
</tr>
</thead>
<tbody>
<tr>
<td><div rel="popover" data-img="images/freeDSP_1_0_features.gif"><strong>CLASSIC</strong></div></td>
<td><div data-toggle="popover" data-trigger="hover" data-placement="top" data-content="2 x Analog IN via Cinch">2 x RCA</div></td>
<td><div data-toggle="popover" data-trigger="hover" data-placement="top" data-content="4 x Analog OUT via Cinch">4 x RCA</div></td>
<td><div class="box green">Ready</div></td>
<td><a href="https://github.com/freeDSP/freeDSP-CLASSIC" target="_blank">Eagle</a>, <a href="https://github.com/freeDSP/freeDSP-CLASSIC/tree/master/SOURCES/ARDUINO" target="_blank">Arduino</a></td>
<td><a href="http://www.reichelt.de/?ACTION=20;AWKID=1038022;PROVID=2084" target="_blank">Reichelt</a>, <a href="http://www.digikey.de/short/3b7fqr" target="_blank">Digikey</a></td>
<td><a href="https://docs.google.com/document/d/1gQ5PzCN1hFmIgi31e2L5NF1VgZXVvlqLSrGzaxm_bFE/edit?usp=sharing" target="_blank">Getting started</a></td>
<td>Only freeDSPx AES/SPDIF IN</td>
<td>ADAU1701</td>
<td><a href="http://us9.campaign-archive2.com/?u=18cdd987e3a8b2d98ac8e2953&id=b5126fafdd&e=7889c72f7b" target="_blank">65€ group buy</a></td><!---->
<tr>
<td><strong>CLASSIC SMD B</strong></td>
<td><div data-toggle="popover" data-trigger="hover" data-placement="top" data-content="2 x Analog IN via Cinch">2 x RCA</div></td>
<td><div data-toggle="popover" data-trigger="hover" data-placement="top" data-content="4 x Analog OUT via Cinch">4 x RCA</div></td>
<td><div class="box green">Ready</div></td>
<td><a href="https://github.com/freeDSP/freeDSP-CLASSIC-SMD-B" target="_blank">KiCad</a></td>
<td><a href="http://www.digikey.de/short/3130dp" target="_blank">Digikey</a></td>
<td><a href="https://docs.google.com/document/d/1K3joEg4iIRMazfqGLaVoBdybitr4o_KIVZfQ-qeNDzs/edit?usp=sharing" target="_blank">Getting started</a></td>
<td><a href="https://github.com/freeDSP/WIKI-AND-GENERAL-TOPICS/wiki/freeDSP-Guidelines" target="_blank">4 I²S expansion connectors</a></td>
<td>ADAU1701</td>
<td></td>
</tr>
<tr>
<td><strong>PiDSP</strong></td>
<td>RasPi In, <div data-toggle="popover" data-trigger="hover" data-placement="top" data-content="1 x In S/PDIF via TOSLINK">S/PDIF</div></td>
<td>RasPi Out, <div data-toggle="popover" data-trigger="hover" data-placement="top" data-content="1 x Out S/PDIF via TOSLINK">S/PDIF</div></td>
<td><div class="box green">Beta-Ready</div><!--<div class="box red"><strong>NEW :-)</strong></div>--></td></td>
<td><a href="https://github.com/freeDSP/PiDSP" target="_blank">Altium</a></td>
<td><a href="https://github.com/freeDSP/PiDSP" target="_blank">BOM<a/></td>
<td><a href="https://docs.google.com/document/d/19vuj6VbJ9ktcaG_P7PJXTnH1ImkcPwiqC4xYBWqMJs8/edit?usp=sharing" target="_blank">Getting started</a></td>
<td><a href="https://github.com/freeDSP/WIKI-AND-GENERAL-TOPICS/wiki/freeDSP-Guidelines" target="_blank">3 I²S expansion connectors</a></td>
<td>ADAU1452</td>
<td></td>
</tr>
<tr>
<td><strong>INSANITY</strong></td>
<td><div data-toggle="popover" data-trigger="hover" data-placement="top" data-content="8 x In Unbalanced via 6.35 mm Stereo Jack, alternatively 4 x In Balanced via 6.35 mm Stereo Jack">8 x Unbal<br>(4 x Bal)</div>
<div data-toggle="popover" data-trigger="hover" data-placement="top" data-content="1 x In S/PDIF via RCA & TOSLINK">1 x S/PDIF</div></td>
<td><div data-toggle="popover" data-trigger="hover" data-placement="top" data-content="8 x Out Unbalanced via 6.35 mm Stereo Jack or 4 x Out Balanced via 6.35 mm Stereo Jack">8 x Unbal<br>(4 x Bal)</div>
<div data-toggle="popover" data-trigger="hover" data-placement="top" data-content="1 x Out S/PDIF via RCA & TOSLINK">1 x S/PDIF</div></td>
<td><div class="box orange">Prep</div></td>
<td><a href="https://github.com/freeDSP/freeDSP-INSANITY" target="_blank"></a>KiCad</td>
<td></td>
<td></td>
<td><a href="https://github.com/freeDSP/WIKI-AND-GENERAL-TOPICS/wiki/freeDSP-Guidelines" target="_blank">3 I²S expansion connectors</a></td>
<td>ADAU1452</td>
<td></td>
</tr>
<tr>
<td><strong>LUMIÈRE</strong></td>
<td><div data-toggle="popover" data-trigger="hover" data-placement="top" data-content="8 x In Balanced via Socket Stripe, Daughter Boards with XLR, Sub-D, Jack or Whatever">8 x Bal</div>
<div data-toggle="popover" data-trigger="hover" data-placement="top" data-content="2 x In ADAT via TOSLINK">2 x ADAT Wordclock</div></td>
<td><div data-toggle="popover" data-trigger="hover" data-placement="top" data-content="8 x Out Balanced via Socket Stripe, Daughter Boards with XLR, Sub-D, Jack or Whatever">8 x Bal</div></td>
<td><div class="box orange">Prep</div></td>
<td><a href="https://github.com/freeDSP/freeDSP-INSANITY" target="_blank"></a>KiCad</td>
<td></td>
<td></td>
<td><a href="https://github.com/freeDSP/WIKI-AND-GENERAL-TOPICS/wiki/freeDSP-Guidelines" target="_blank">2 I²S expansion connectors</a></td>
<td>ADAU1452, Arduino integrated</td>
<td></td>
</tr>
<tr>
<td><strong>nanoDSP</strong></td>
<td><div data-toggle="popover" data-trigger="hover" data-placement="top" data-content="2Vrms, 2 x Analog In via RCA or Screwterminals, alternatively 1 x Balanced In/Loopthrough out via XLR">2 x Analog</div></td>
<td><div data-toggle="popover" data-trigger="hover" data-placement="top" data-content="2Vrms, 4 x Analog Out via RCA or Screwterminals, alternatively 2 x Balanced Out via XLR">4 x Analog</div></td>
<td><div class="box green">Ready</div></td></td>
<td>Not available</td><!--Eagle-->
<td></td>
<td><a href="https://drive.google.com/file/d/0Bx9YeifwIPQjQV9qQl8wb2VMWUE/view?usp=sharing" target="_blank">Getting started</a></td>
<td>No expansion header</td><!--options: 1 potmeter, bicolor led driver-->
<td>ADAU1701</td>
<td><a href="https://www.htfelectronics.nl/nl/nano-dsp.html" target="_blank">60 € + TH parts</a></td>
</tr>
<tr>
<td><strong>CLASSIC SMD A</strong></td>
<td><div data-toggle="popover" data-trigger="hover" data-placement="top" data-content="2 x Analog IN via 3,5 mm Stereo Jack">2 x Analog</div></td>
<td><div data-toggle="popover" data-trigger="hover" data-placement="top" data-content="4 x Analog OUT via 3,5 mm Stereo Jack">4 x Analog</div></td>
<td><div class="box green">Ready</div></td>
<td><a href="https://github.com/freeDSP/freeDSP-CLASSIC-SMD-A" target="_blank">KiCad</a></td>
<td></td>
<td></td>
<td>freeDSPx <nobr>AES/SPDIF IN</nobr>, ... </td>
<td>ADAU1701</td>
<td></td>
</tr>
<tr>
<td><strong>CLASSIC BAL A</strong></td>
<td><div data-toggle="popover" data-trigger="hover" data-placement="top" data-content="2 x Analog IN via terminal block connector">2 x Bal</div></td>
<td><div data-toggle="popover" data-trigger="hover" data-placement="top" data-content="4 x Analog OUT via terminal block connector">4 x Bal</div></td>
<td><div class="box green"><nobr>Ready</nobr></div></td>
<td><a href="https://github.com/freeDSP/freeDSP-CLASSIC-SMD-BALANCED" target="_blank">KiCad</a></td>
<td></td>
<td></td>
<td><a href="https://github.com/freeDSP/WIKI-AND-GENERAL-TOPICS/wiki/freeDSP-Guidelines" target="_blank">1 I²S expansion connector</a></td><!--I²S MicroMatch-Header-->
<td>ADAU1701</td>
<td></td>
</tr>
</tbody>
<tr class="removeTableBorderTopAndBottom">
<td colspan="10" class="text-center"><br><h3>Programmer</h3></td>
</tr>
<thead>
<tr>
<th>Name</th>
<th>In</th>
<th>Out</th>
<th>Status</th>
<th>Source</th>
<th>Parts</th>
<th>Documentation</th>
<th width="200px">Compatibility</th> <!-- FIXED WIDTH ??? -->
<th>Notes</th>
<th>Cost</th>
</tr>
</thead>
<tbody>
<tr>
<td><div rel="popover" data-img="images/freeUSBi.jpg"><strong>freeUSBi + <nobr>EZ-USB</nobr></strong></div></td>
<td>USB</td>
<td>-</td>
<td><div class="box green">Ready</div></td></td>
<td><a href="https://github.com/freeDSP/freeUSBi" target="_blank">KiCad</a>, <a href="https://github.com/freeDSP/freeUSBi/tree/master/SOURCES/DRIVERS" target="_blank">Drivers</a></td>
<td><a href="https://secure.reichelt.de/index.html?&ACTION=20&AWKID=1109732&PROVID=2084" target="_blank">Reichelt</a>, <a href="http://www.digikey.com/short/3bprrq" target="_blank">Digikey</a></td>
<td><a href="https://docs.google.com/document/d/1rKkCl3gyePwX15c3sjEIKP6Bb7CO77hgRAXtbYz5hA0/edit?usp=sharing" target="_blank">Getting started</a></td>
<td>All freeDSP boards</td>
<td></td>
<td></td>
</tr>
</tbody>
<tr class="removeTableBorderTopAndBottom">
<td colspan="10" class="text-center"><br><h3>IO expansions</h3></td>
</tr>
<thead>
<tr>
<th><strong>freeDSP<span class="highlight1">x</span></strong></th>
<th>In</th>
<th>Out</th>
<th>Status</th>
<th>Source</th>
<th>Parts</th>
<th>Documentation</th>
<th width="200px">Compatibility</th> <!-- FIXED WIDTH ??? -->
<th>Notes</th>
<th>Cost</th>
</tr>
</thead>
<tbody>
<tr>
<td><div rel="popover" data-img="images/freeDSPx-AES-SPDIF-IN.jpg"><strong>AES/SPDIF IN</strong></div></td>
<td><div data-toggle="popover" data-trigger="hover" data-placement="top" data-content="1 x In AES/EBU via XLR socket + 1 x In S/PDIF via RCA (Cinch)">1 x AES/EBU<br>1 x S/PDIF</div></td>
<td>-</td>
<td><div class="box green">Ready</div></td>
<td><a href="https://github.com/freeDSP/freeDSPx-AES-SPDIF-IN" target="_blank">Eagle</a></td>
<td><a href="https://github.com/freeDSP/freeDSPx-AES-SPDIF-IN/tree/master/PART%20LIST" target="_blank">Excel</a></td>
<td><a href="https://docs.google.com/open?id=1klaNH2u24zRKs_nh_jul-xbZ4rEBayKxEizu10gGNMk" target="_blank">Getting started</a></td>
<td>Only freeDSP CLASSIC</td>
<td></td>
<td></td>
</tr>
<tr>
<td><strong>UNBAL OUT x8</strong></td>
<td>-</td>
<td><div data-toggle="popover" data-trigger="hover" data-placement="top" data-content="8 x Analog OUT via 3,5 mm Stereo Jack"><nobr>8 x Analog</nobr></div></td>
<td><div class="box green">Tested</div></td>
<td><a href="https://github.com/freeDSP/freeDSPx-UNBAL-OUT-x8" target="_blank">KiCad</a></td>
<td></td>
<td></td>
<td>Only freeDSP CLASSIC SMD <strong>A</strong></td>
<td></td>
<td></td>
</tr>
<tr>
<td><strong>UNBAL IN x8</strong></td>
<td><div data-toggle="popover" data-trigger="hover" data-placement="top" data-content="8 x Analog IN via 3,5 mm Stereo Jack">8 x Analog</div></td>
<td>-</td>
<td><div class="box green">Tested</div></td>
<td><a href="https://github.com/freeDSP/freeDSPx-UNBAL-IN-x8" target="_blank">KiCad</a></td>
<td></td>
<td></td>
<td>Only freeDSP CLASSIC SMD <strong>A</strong></td>
<td></td>
<td></td>
</tr>
<tr>
<td><div rel="popover" data-img="images/"><strong>STANDARD CONNECTOR ADAPTER</strong></div></td>
<td colspan="2"><a href="https://github.com/freeDSP/WIKI-AND-GENERAL-TOPICS/wiki/freeDSP-Guidelines" target="_blank">4 x I²S expansion connectors for in and out</a></td>
<!--<td><div class="box orange">Prep</div></td>-->
<td><div class="box green"><nobr>Ready</nobr></div></td>
<td><a href="https://github.com/freeDSP/freeDSP-StdConnectorAdapter" target="_blank">KiCad</a></td>
<td><a href="https://www.reichelt.de/my/1322859" target="_blank">Reichelt</a></td>
<td><a href="https://docs.google.com/document/d/1hn0SlT0MzGtAtfOlIJ-imr8tRVwPhUQNysTME_q8S0M/edit?usp=sharing" target="_blank">Getting started</a></td>
<td colspan="2">Adapter of the old freeDSP CLASSIC pin header to the new freeDSP <a href="https://github.com/freeDSP/WIKI-AND-GENERAL-TOPICS/wiki/freeDSP-Guidelines" target="_blank">I²S connector</a>.</td>
<td></td>
</tr>
<tr>
<td><strong>AMP x2</strong></td>
<td><a href="https://github.com/freeDSP/WIKI-AND-GENERAL-TOPICS/wiki/freeDSP-Guidelines" target="_blank">I²S expansion connector</a></td>
<td>2 x Terminal Block</td>
<td><div class="box green">Ready</div></td>
<td><a href="https://github.com/freeDSP/freeDSPx-AMP-x2" target="_blank">KiCad</a></td>
<td><a href="http://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=41f46da3ff" target="_blank">Mouser</a></td>
<td><a href="https://docs.google.com/document/d/1llKBINu6W2MGQ0nZzaExk8-fQ7l8HOFVpu1stu-M4eY/edit?usp=sharing">Getting Started</a></td>
<td><a href="https://github.com/freeDSP/WIKI-AND-GENERAL-TOPICS/wiki/freeDSP-Guidelines" target="_blank">I²S expansion connector</a></td>
<td>0.1% THD @12W 4Ω</td>
<td></td>
</tr>
<tr>
<td><strong>AMP x4</strong></td>
<td><a href="https://github.com/freeDSP/WIKI-AND-GENERAL-TOPICS/wiki/freeDSP-Guidelines" target="_blank">I²S expansion connector</a></td>
<td>4 x Terminal Block</td>
<td><div class="box green">Ready</div></td>
<td><a href="https://github.com/freeDSP/freeDSPx-AMP-x4" target="_blank">KiCad</a></td>
<td><a href="https://www.mouser.de/ProjectManager/ProjectDetail.aspx?AccessID=af1cc43262" target="_blank">Mouser</a></td>
<td><a href="https://docs.google.com/document/d/1tbhADnNkIt9oIQV_oO-B78TdL-QS84C08iAzlXl_Vq0/edit?usp=sharing">Getting Started</a></td>
<td><a href="https://github.com/freeDSP/WIKI-AND-GENERAL-TOPICS/wiki/freeDSP-Guidelines" target="_blank">I²S expansion connector</a>, two AMPs can be used on one I²S TDM 8 output</td>
<td>0.1% THD @12W 4Ω</td>
<td></td>
</tr>
<tr>
<td><strong>SPDIF IO</strong></td>
<td><div data-toggle="popover" data-trigger="hover" data-placement="top" data-content="1 x In SPDIF via RCA & Toslink">1 x S/PDIF</div></td>
<td><div data-toggle="popover" data-trigger="hover" data-placement="top" data-content="1 x Out SPDIF via RCA & Toslink">1 x S/PDIF</div></td>
<td><div class="box red">Help wanted</div></td>
<td><a href="https://github.com/freeDSP/freeDSPx-SPDIF-IO" target="_blank">KiCad</a></td>
<td></td>
<td></td>
<td><a href="https://github.com/freeDSP/WIKI-AND-GENERAL-TOPICS/wiki/freeDSP-Guidelines" target="_blank">I²S expansion connector</a></td>
<td></td>
<td></td>
</tr>
<tr>
<td><strong>ADAT IO x4</strong></td>
<td><div data-toggle="popover" data-trigger="hover" data-placement="top" data-content="4 x In ADAT via Toslink">4 x ADAT</div></td>
<td><div data-toggle="popover" data-trigger="hover" data-placement="top" data-content="4 x Out ADAT via Toslink">4 x ADAT</div></td>
<td><div class="box orange">Prep</div></td>
<td><a href="https://github.com/freeDSP/freeDSPx-ADAT-IO-x4" target="_blank">KiCad, VHDL</a></td>
<td></td>
<td></td>
<td><a href="https://github.com/freeDSP/WIKI-AND-GENERAL-TOPICS/wiki/freeDSP-Guidelines" target="_blank">I²S expansion connector</a></td>
<td></td>
<td></td>
</tr>
<tr>
<td><strong>BAL IO x4</strong></td>
<td><div data-toggle="popover" data-trigger="hover" data-placement="top" data-content="4 x In Balanced Analog via 6.35 mm Stereo Jack, alt. 8 In Unbal.">4 x Analog</div></td>
<td><div data-toggle="popover" data-trigger="hover" data-placement="top" data-content="4 x Out Balanced Analog via 6.35 mm Stereo Jack, alt. 8 Out Unbal.">4 x Analog</div></td>
<td><div class="box red">Help wanted</div></td>
<td><a href="" target="_blank"></a></td>
<td></td>
<td></td>
<td><a href="https://github.com/freeDSP/WIKI-AND-GENERAL-TOPICS/wiki/freeDSP-Guidelines" target="_blank">I²S expansion connector</a></td>
<td></td>
<td></td>
</tr>
<tr>
<td><strong>UNBAL IO x2</strong></td>
<td><div data-toggle="popover" data-trigger="hover" data-placement="top" data-content="2 x Analog In via RCA (Cinch)">2 x RCA</div></td>
<td><div data-toggle="popover" data-trigger="hover" data-placement="top" data-content="2 x Analog Out via RCA (Cinch)">2 x RCA</div></td>
<td><div class="box red">Help wanted</div></td>
<td><a href="" target="_blank"></a></td>
<td></td>
<td></td>
<td><a href="https://github.com/freeDSP/WIKI-AND-GENERAL-TOPICS/wiki/freeDSP-Guidelines" target="_blank">I²S expansion connector</a></td>
<td>Maybe 4 Out</td>
<td></td>
</tr>
<tr>
<td><strong>BAL OUT x16</strong></td>
<td>-</td>
<td><div data-toggle="popover" data-trigger="hover" data-placement="top" data-content="16 x Balanced Out Analog via SUB-D">16 x Analog</div>
<td><div class="box orange">Prep</div></td>
<td><a href="" target="_blank"></a>KiCad</td>
<td></td>
<td></td>
<td><a href="https://github.com/freeDSP/WIKI-AND-GENERAL-TOPICS/wiki/freeDSP-Guidelines" target="_blank">I²S expansion connector</a></td>
<td></td>
<td></td>
</tr>
<tr>
<td><strong>PHONES AMP</strong></td>
<td>-</td>
<td>1 x Jack <nobr>6,35 mm</nobr></td>
<td><div class="box orange">Prep</div></td>
<td><a href="" target="_blank"></a>KiCad</td>
<td></td>
<td></td>
<td><a href="https://github.com/freeDSP/WIKI-AND-GENERAL-TOPICS/wiki/freeDSP-Guidelines" target="_blank">I²S expansion connector</a></td>
<td></td>
<td></td>
</tr>
<tr>
<td><strong>HDMI IO</strong></td>
<td>< 4 x HDMI</td>
<td>1 x HDMI</td>
<td><div class="box red">Help wanted</div></td>
<td><a href="" target="_blank"></a></td>
<td></td>
<td></td>
<td><a href="https://github.com/freeDSP/WIKI-AND-GENERAL-TOPICS/wiki/freeDSP-Guidelines" target="_blank">I²S expansion connector</a></td>
<td></td>
<td></td>
</tr>
<tr>
<td><strong>DOLBY/DTS/AC3 IO</strong></td>
<td>1 x Toslink</td>
<td>1 x Toslink</td>
<td><div class="box red">Help wanted</div></td>
<td><a href="" target="_blank"></a></td>
<td></td>
<td></td>
<td><a href="https://github.com/freeDSP/WIKI-AND-GENERAL-TOPICS/wiki/freeDSP-Guidelines" target="_blank">I²S expansion connector</a></td>
<td></td>
<td></td>
</tr>
</tbody>
<!--<tfoot>
<tr>
<td colspan="10" class="text-center">Some text.</td>
</tr>
</tfoot>-->
</table>
</div><!--end of .table-responsive-->
</div><!-- /row -->
</div><!-- /container -->
</section>
<!--////////// QUOTE SECTION //////////-->
<section id="quote">
<div class="container">
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<div class="col-md-10 col-md-offset-1">
<p class="lead text-center">The freeDSP is so cool. :-)</p>
</div><!-- /col-md-10 -->
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</div><!-- /container -->
</section>
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<p>Serial I2C communication with a freeDSP using a microcontroller</p>
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<p>An I2C getting started guide.</p>
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<img src="images/freeDSP-Arduino.jpg" alt="" title="" class="img-responsive" />
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<h4 class="modal-title">Serial I2C communication with a freeDSP using a microcontroller, e.g. an Arduino</h4>
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<!--<h4>Serial communication with a freeDSP using a microcontroller</h4>-->
<p> This getting started guide targets anyone, who wants to access registers and memory of the ADAU1701 via the I2C serial interface. At the end of the step-by-step guide we will know how the I2C interface works and how to address the DSP, its registers and memories and exchange data with them.</p>
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<p>Serial I2S audio transmission with the freeDSP</p>
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<p>An I2S getting started guide.</p>
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<p>Multiple freeDSP modules enable digital audio transfer via serial data protocols. This document will give an overview of these protocols and will enable you to use them correctly.</p>
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<p>Hand soldering an ADAU1701</p>
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<p>A video to show one option for hand soldering of an ADAU1701 (currently only in German language).</p>
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<p>The trickiest part when soldering a freeDSP CLASSIC by hand is the ADAU1701, which comes in an SMD QFP-44 packaging. Ludwig made a video to show the soldering process (currently only in German language). However, this is definitely not recommended for soldering beginners! If you are in doubt of your skills better wait for a freeDSP kit with preassembled SMD parts or a populated board.</p>
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<p>freeDSP-PSoC project with SPI communication (only German)</p>
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<p>Ein Beispielprojekt für ein Gitarreneffektgerät mit Quellcode</p>
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<!--<h4>Serial communication with a freeDSP using a microcontroller</h4>-->
<p> Das Ziel dieses Beispielprojektes ist es, die Kommunikation eines PSoCs mit dem freeDSP INSANITY zu erläutern. Dabei wird auf die Kommunikationsprotokolle SPI zurückgegriffen. Des Weiteren wird das allgemeine Vorgehen für die externe Steuerung des freeDSP mit dem PSoC erläutert. Die Funktionsweise der Kommunikation wird anhand eines praktischen Beispiels dargestellt. Dafür wird für eine E-Gitarre ein mittels eines kapazitiven Sliders gesteuertes Effektgerät mit einem Pitchshift (Vibrato) entwickelt.</p>
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<p>freeDSP classic case</p>
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<p>A 3D-printed case for the freeDSP classic.</p>
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<!--<h4>Serial communication with a freeDSP using a microcontroller</h4>-->
<p>Thanks to Johann for the nice freeDSP classic case. The corresponding BLENDER, STL and OBJ files can be downloaded here for 3D printing. If you want the honey comb optic use a slicer like Slic3r.</p>
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<p class="lead text-center">Our <a href="https://www.reddit.com/r/diysound/">reddit "Ask Me Anything"</a> is live on Tuesday 13.06.17 18.oo - 20.oo CET. Ask us anything about this project. :-) </p>
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