Sorin Marghitoiu — KO6ETZ
Software Engineer · Ham Radio · Indie Developer
I build radio control software, audio visualizers, and hardware projects — then put them all here. Over 20 years as a software engineer. Currently at USC’s CiSoft lab.
Apps & Software
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OmniRig Remote Suite
Free
Windows
Mobile
Web
Control your ham radios from anywhere. Server with Morse/RTTY/PSK31/SSTV decoders, plus desktop, mobile, web, and Home Assistant clients.
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Stereo Spectrum Analyzer
$4.99
Windows
Android
iOS
40+ audio-reactive visualizations, built-in music player, 30,000+ internet radio stations, and a shader sandbox.
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Intimate Connection
$4.99
iOS
Android
Windows
Private mood-sharing for couples. AES-256-GCM encrypted, local WiFi only. No servers, no accounts, no data harvesting.
Learn more →From the Workbench
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Fixing a Rohde & Schwarz CMU200/300
Taking a broken universal radio communication tester from eBay and bringing it back to life.
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Repurposing an Anritsu MD8475A
A cellular signaling tester designed for base station testing, now repurposed for radio experimentation.
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ESP32-S3 Remote Control Knob
Custom hardware controller with LVGL touchscreen UI, WiFi, and TCP connection to OmniRig Server. Tune from across the room.
Read more →What I’m Working On
Last updated: March 2026
- Shipped Stereo Spectrum Analyzer v2 — 40+ visualizations, built-in player, internet radio, SKSL shader sandbox, network media browsing.
- Shipped Spectra Media Player — Mobile version for Android & iOS with 37+ visualizations, 62 shader presets, and molecule structures from PubChem.
- Active OmniRig SSTV decoder — Adding support for Robot, Martin, Scottie, PD, Wraase, and Pasokon modes.
- Ongoing Lumea Vidă translation — Translating my father’s philosophical treatise “The Void World” from Romanian to English. ~9% complete.