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1. Thorwegian ❄️ (thor@berserker.town)'s status on Saturday, 05-Mar-2022 05:54:51 UTC Thorwegian ❄️

   @jessica fun fact: while mono FM is encoded by having the frequency of the carrier track the amplitude of the audio signal, the stereo part of the signal is encoded as an AM side carrier.

   stereo FM is basically L+R encoded in FM as the main carrier and L-R encoded in AM as the side carrier. since AM is more sensitive to noise, it's more prone to dropping out. the receiver drops it if it's too weak/noisy.

   • Santa Claes 🇸🇪🇭🇰🎅 likes this.
   • Santa Claes 🇸🇪🇭🇰🎅 (clacke@libranet.de)'s status on Saturday, 05-Mar-2022 05:56:21 UTC Santa Claes 🇸🇪🇭🇰🎅

     in reply to
     @thor @jessica Wow. I always assumed it was two carriers.
     
     I assume the FM+AM encoding saves bandwidth, allows you to stay in the same channel width as mono FM?
   • Thorwegian ❄️ (thor@berserker.town)'s status on Saturday, 05-Mar-2022 05:59:50 UTC Thorwegian ❄️

     in reply to

     • Santa Claes 🇸🇪🇭🇰🎅

     @clacke @jessica "do you want to listen to the left side of this 1960s hard-panned stereo recording where the drums are, or the right side, where the piano is?"

     Santa Claes 🇸🇪🇭🇰🎅 likes this.
   • Thorwegian ❄️ (thor@berserker.town)'s status on Saturday, 05-Mar-2022 05:59:51 UTC Thorwegian ❄️

     in reply to

     • Santa Claes 🇸🇪🇭🇰🎅

     @clacke @jessica i think stereo FM is wider, but not as wide as it would have to be if it were two FM carriers.

     you can imagine the chaos if you tried to tune to a station on a mono FM receiver. every channel would be doubled.