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   sci.electronics.repair      Fixing electronic equipment      124,925 messages   

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   Message 123,400 of 124,925   
   Charles Lucas to Bodger   
   Re: trying to make an audio loopback/ant   
   18 Jan 23 09:15:36   
   
   From: clsnowyowl@gmail.com   
      
   On Saturday, January 14, 2023 at 5:29:13 PM UTC-6, Bodger wrote:   
   > On 1/14/2023 4:25 PM, Bob F wrote:   
   > > On 1/14/2023 1:03 PM, Bodger wrote:   
   > >> On 1/14/2023 2:17 PM, Bob F wrote:   
   > >>> I have been trying to get my Galaxy S9 to record FM radio programs.   
   > >>> NextRadio is the only app that I have gotten to work to receive FM using   
   > >>> the internal tuner, but it has no record capability.   
   > >> snip...   
   > >>   
   > >> I have no idea about your problem but I'm gobsmacked that a phone has an   
   > >> external microphone input. I've never seen or heard of such a thing.   
   > >>   
   > >   
   > > It is the same jack that you plug headphones into. Completely compatible   
   > > with headphones that include a mic with a 4 conductor TRRS plug. I think   
   > > that is pretty common.   
   > >   
   > > I should add to the original post that my OS is updated to Android 10,   
   > > G960UTUES9FVD1.   
   > OK, now that makes sense. Somehow my mind jumped to the image of a separate   
   > microphone input. Probably some gray cells are winking out from lack of   
   use...   
      
   A signal always travels from its output to its input as long as the rules of   
   proper   
   power and impedance are followed along the way- kind of like a glorified postal   
   system, from a conceptual sense.   
      
   The headphone jack can be use as a variable audio output jack when using a   
   patch   
   cord or Y-adapter patch cable from that device to an RCA audio R/L audio input   
   on   
   an analog recording device (converting the impedance from an 1/8" (3.5 mm) jack   
   at 32 ohms to an RCA jack at 1000 ohms) which leads up to an analog device.   
      
   Or you can use an 1/8" male to male patch cable to go to a computer line input   
   or   
   other similar device to convert the signal to a digital sampler (starting out   
   as analog   
   and then getting converted to a digital media in the processing). You have to   
   remember   
   level control is also very important. Don't overload the headphone outs with   
   "too much"   
   signal (or distortive audio) or avoid overdriving the signal.   
      
   Good Luck.   
      
   Charles Lucas   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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