Uploaded December 2025 | Updated September 2026, 2 weeks ago
DIY electronics, recycled parts, and compact builds come together in this simple 4-channel passive audio mixer made from scrap hardware. If you’re short on desk space but want to combine multiple devices into your computer, this tiny mixer shows exactly how to do it using basic components and an old sound card.
In this video, I walk through the build step-by-step, test it with real gear (Roland TR-505 & Behringer JT4000 Micro), and show how four 10k resistors can create a clean, functional passive mix—perfect for small setups, retro machines, or low-cost audio experiments.
If you enjoy DIY electronics, recycling old tech, or simple builds that just work, you’ll enjoy this one.
00:00 Welcome & Desk Space Problem
00:21 Why a Regular Mixer Won’t Fit
00:45 Salvaging Parts From an Old Sound Card
01:18 Building the Simple Passive Mixer
02:30 First Audio Tests
03:04 Mixing Multiple Devices
03:38 Cleaning & Finishing the Build
04:07 Final Thoughts
You can find my books on Amazon -young adult and sci-fi
Such as:
Fixing Time - amazon.com/Fixing-Time-Mark-Vaughan-ebook/dp/B07YQCZ162
The Beacon/ The Beacon 2 -amazon.com/Beacon-Battle-Nuclear-Creek-Combined-ebook/dp/B084Q37TKV
The Agaileia Trilogy - amazon.com/Agaileia-Trilogy-Mark-Vaughan-ebook/dp/B07ZN76B19
Agaileia vs Sherlock Holmes - amazon.com/Agaileia-Sherlock-Holmes-Mark-Vaughan-ebook/dp/B087N6HM5S
A Question Of Worth - amazon.com/Question-Worth-Mark-Vaughan-ebook/dp/B082PJFTZG
The NEW audiobook that I narrated -
Incredible Insects!
amazon.com/Incredible-Insects-Astonishing-Mind-Blowing-Everything/dp/B0G2759QVY
and
audible.com/pd/Incredible-Insects-Audiobook/B0G278FMS6
Enjoy my Playlists -
Wireless Electricity: youtube.com/watch?v=yYoYyuR1KuI&list=PLIhGrBMUdssWpFSLW1hznwNqXWpCxhDRQ
Electronics Projects: youtube.com/watch?v=F4nfaYkGvQI&list=PLIhGrBMUdssWLQWtW4dWWGgh25XG3HXek
Solar Projects: youtube.com/watch?v=nmKfxI4MTTs&list=PLIhGrBMUdssXu9Pmduvopm02_7IMz8d3M
Reviews: youtube.com/watch?v=8jAJysXXsw8&list=PLIhGrBMUdssUYzRgA1mrp18zwpTtClmov
💼 Business and reviews email:
youtube.scoop273@passinbox.com
#diyelectronics #audioDIY #recycledtech
DIY electronics, recycled parts, and compact builds come together in this simple 4-channel passive audio mixer made from scrap hardware. If you’re short on desk space but want to combine multiple devices into your computer, this tiny mixer shows exactly how to do it using basic components and an old sound card.
In this video, I walk through the build step-by-step, test it with real gear (Roland TR-505 & Behringer JT4000 Micro), and show how four 10k resistors can create a clean, functional passive mix—perfect for small setups, retro machines, or low-cost audio experiments.
If you enjoy DIY electronics, recycling old tech, or simple builds that just work, you’ll enjoy this one.
00:00 Welcome & Desk Space Problem
00:21 Why a Regular Mixer Won’t Fit
00:45 Salvaging Parts From an Old Sound Card
01:18 Building the Simple Passive Mixer
02:30 First Audio Tests
03:04 Mixing Multiple Devices
03:38 Cleaning & Finishing the Build
04:07 Final Thoughts
You can find my books on Amazon -young adult and sci-fi
Such as:
Fixing Time - amazon.com/Fixing-Time-Mark-Vaughan-ebook/dp/B07YQCZ162
The Beacon/ The Beacon 2 -amazon.com/Beacon-Battle-Nuclear-Creek-Combined-ebook/dp/B084Q37TKV
The Agaileia Trilogy - amazon.com/Agaileia-Trilogy-Mark-Vaughan-ebook/dp/B07ZN76B19
Agaileia vs Sherlock Holmes - amazon.com/Agaileia-Sherlock-Holmes-Mark-Vaughan-ebook/dp/B087N6HM5S
A Question Of Worth - amazon.com/Question-Worth-Mark-Vaughan-ebook/dp/B082PJFTZG
The NEW audiobook that I narrated -
Incredible Insects!
amazon.com/Incredible-Insects-Astonishing-Mind-Blowing-Everything/dp/B0G2759QVY
and
audible.com/pd/Incredible-Insects-Audiobook/B0G278FMS6
Enjoy my Playlists -
Wireless Electricity: youtube.com/watch?v=yYoYyuR1KuI&list=PLIhGrBMUdssWpFSLW1hznwNqXWpCxhDRQ
Electronics Projects: youtube.com/watch?v=F4nfaYkGvQI&list=PLIhGrBMUdssWLQWtW4dWWGgh25XG3HXek
Solar Projects: youtube.com/watch?v=nmKfxI4MTTs&list=PLIhGrBMUdssXu9Pmduvopm02_7IMz8d3M
Reviews: youtube.com/watch?v=8jAJysXXsw8&list=PLIhGrBMUdssUYzRgA1mrp18zwpTtClmov
💼 Business and reviews email:
youtube.scoop273@passinbox.com
#diyelectronics #audioDIY #recycledtech
