XPost: comp.mobile.android   
   From: bobnospam@gmail.com   
      
   On 1/18/2023 9:15 AM, Charles Lucas wrote:   
   > 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.   
   >   
      
   I tried a half dozen recording apps to try to record the NextRadio audio   
   from the headphone jack back at a lower level into the mic input. One of   
   them "Voice recorder" 21.3.55.16, causes NextRadio to stop   
   receiving/outputting the FM audio while it is recording.   
      
   The other recording apps I tried would let NextRadio keep going, but the   
   app shows zero signal, so no audio gets recorded.   
      
   I tried a couple of the apps while playing an mp3 file on the phone, and   
   the audio was recorded properly.   
      
   So, it really seems like NextRadio is doing something wierd to prevent   
   recording of it's output.   
      
   Can anyone propose what they might be doing, or ways to get past it.   
      
   I cannot find any other FM apps that will run on my S9.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)