{"id":155,"date":"2026-09-03T01:05:27","date_gmt":"2026-09-02T22:05:27","guid":{"rendered":"https:\/\/offlabelhardware.com\/?p=155"},"modified":"2026-09-04T22:36:22","modified_gmt":"2026-09-04T19:36:22","slug":"three-audigy-2-zs-one-analog-switch","status":"publish","type":"post","link":"https:\/\/offlabelhardware.com\/?p=155","title":{"rendered":"Three Audigy 2 ZS, One Analog Switch"},"content":{"rendered":"\n

Part 1 \u2014 Turning Sound Cards Into a Switch<\/h1>\n\n\n\n

I have accumulated quite a few old sound cards over the years. Most of them are still perfectly usable, but their original purpose has become increasingly difficult to justify.<\/p>\n\n\n\n

Modern motherboards already provide decent audio, and external USB interfaces have become inexpensive and extremely capable. For most systems, there is little reason to install an old sound card.<\/p>\n\n\n\n

But one particular card has an interesting capability that makes it useful for a very different purpose: the Creative Audigy 2 ZS<\/strong>.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

I wanted to solve a particular problem in my audio system: 5.1-channel analog switching<\/strong>.<\/p>\n\n\n\n

My audio system uses six analog channels \u2014 Front Left\/Right, Rear Left\/Right, Center and Subwoofer \u2014 and I wanted to be able to switch between multiple 5.1 sources without converting the signal to digital and back again.<\/p>\n\n\n\n

The obvious solution would be a dedicated multi-channel analog switch.<\/p>\n\n\n\n

But where would be the fun in that?<\/p>\n\n\n\n

I had three Creative Audigy 2 ZS sound cards<\/strong>.<\/p>\n\n\n\n

And that raised an unusual possibility.<\/p>\n\n\n\n

Three Audigy 2 ZS With Another Job<\/h2>\n\n\n\n

The Audigy 2 ZS is fundamentally a PC sound card. It has analog inputs, multi-channel analog outputs and circuitry designed to handle surround audio.<\/p>\n\n\n\n

I started wondering whether its particular analog connectivity could be repurposed as something completely different:<\/p>\n\n\n\n

an analog audio switch.<\/strong><\/p>\n\n\n\n

Instead of asking each Audigy 2 ZS to function as a conventional sound card, the idea was to use the cards’ analog connections to route individual channels.<\/p>\n\n\n\n

Three Audigy 2 ZS cards would provide enough analog connectivity to construct the switching arrangement I needed.<\/p>\n\n\n\n

The important part was that the actual signal path would remain analog<\/strong>.<\/p>\n\n\n\n

There would be no requirement to capture the audio into the computer, process it digitally and then convert it back to analog.<\/p>\n\n\n\n

The PC would essentially become a control mechanism for a collection of old audio circuits.<\/p>\n\n\n\n

Why Not Just Use a Digital Solution?<\/h2>\n\n\n\n

There are plenty of modern ways to solve this problem.<\/p>\n\n\n\n

A digital audio processor could accept multiple sources, switch between them and provide the required outputs. An AVR could do much of the same thing. A dedicated analog switching matrix would also be a perfectly sensible solution.<\/p>\n\n\n\n

But this experiment isn’t about finding the easiest way to accomplish something.<\/p>\n\n\n\n

It is about finding another use for hardware that already exists.<\/p>\n\n\n\n

The Audigy 2 ZS cards are inexpensive, obsolete by today’s standards and surprisingly well equipped for their original era. Rather than leaving them in a box, I wanted to see whether their analog circuitry could be turned into a useful piece of infrastructure.<\/p>\n\n\n\n

There is also something satisfying about doing a 5.1-channel switch entirely in the analog domain<\/strong> with hardware that was originally designed to be a PC sound card.<\/p>\n\n\n\n

The Challenge<\/h2>\n\n\n\n

The difficult part isn’t switching one stereo signal.<\/p>\n\n\n\n

Switching stereo is easy.<\/p>\n\n\n\n

The challenge is doing it with six channels simultaneously<\/strong> while keeping the channels correctly matched and avoiding unwanted interaction between sources.<\/p>\n\n\n\n

Every source has:<\/p>\n\n\n\n

    \n
  • Front Left<\/li>\n\n\n\n
  • Front Right<\/li>\n\n\n\n
  • Rear Left<\/li>\n\n\n\n
  • Rear Right<\/li>\n\n\n\n
  • Center<\/li>\n\n\n\n
  • LFE<\/li>\n<\/ul>\n\n\n\n

    A proper switch therefore has to treat the six channels as a single 5.1 system.<\/p>\n\n\n\n

    The three Audigy 2 ZS cards provide the hardware needed to build this arrangement, while also making the project considerably more interesting than simply wiring a few mechanical switches together.<\/p>\n\n\n\n

    The goal isn’t to make the Audigy 2 ZS cards process the audio.<\/p>\n\n\n\n

    Their new job is much simpler:<\/p>\n\n\n\n

    move the right analog signal to the right place.<\/strong><\/p>\n\n\n\n

    An Unusual Second Life<\/h2>\n\n\n\n

    There is something particularly appropriate about using an old sound card this way.<\/p>\n\n\n\n

    The Audigy 2 ZS was designed at a time when a PC’s audio capabilities were still a major part of its identity. Multi-channel gaming, DVD audio and surround sound were important selling points.<\/p>\n\n\n\n

    Years later, the same hardware can potentially become something much simpler and more specialized.<\/p>\n\n\n\n

    Not a conventional sound card.<\/p>\n\n\n\n

    Not a gaming audio processor.<\/p>\n\n\n\n

    Not an effects processor.<\/p>\n\n\n\n

    An analog switching component.<\/strong><\/p>\n\n\n\n

    The experiment is therefore less about whether an Audigy 2 ZS is still a good sound card.<\/p>\n\n\n\n

    It is about whether the analog hardware inside an obsolete Audigy 2 ZS<\/strong> can be useful after its original purpose has disappeared<\/strong>.<\/p>\n\n\n\n

    And that leads to the real question of this project:<\/p>\n\n\n\n

    Can three Creative Audigy 2 ZS cards become a practical 5.1 analog switch?<\/strong><\/p>\n\n\n\n

    <\/p>\n","protected":false},"excerpt":{"rendered":"

    Can three Creative Audigy 2 ZS sound cards become a 5.1-channel analog switch? An experiment in routing multiple six-channel audio sources entirely in the analog domain, using hardware designed for a completely different purpose.<\/p>\n","protected":false},"author":1,"featured_media":186,"comment_status":"open","ping_status":"closed","sticky":false,"template":"project","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":["post-155","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-projects"],"_links":{"self":[{"href":"https:\/\/offlabelhardware.com\/index.php?rest_route=\/wp\/v2\/posts\/155","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/offlabelhardware.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/offlabelhardware.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/offlabelhardware.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/offlabelhardware.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=155"}],"version-history":[{"count":3,"href":"https:\/\/offlabelhardware.com\/index.php?rest_route=\/wp\/v2\/posts\/155\/revisions"}],"predecessor-version":[{"id":185,"href":"https:\/\/offlabelhardware.com\/index.php?rest_route=\/wp\/v2\/posts\/155\/revisions\/185"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/offlabelhardware.com\/index.php?rest_route=\/wp\/v2\/media\/186"}],"wp:attachment":[{"href":"https:\/\/offlabelhardware.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=155"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/offlabelhardware.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=155"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/offlabelhardware.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=155"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}