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DanielleFong's profile
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@DanielleFong

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@DanielleFong

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Empire of the Future
Joined February 2008

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    1. Coraline Ada Ehmke‏Verified account @CoralineAda 13 Jun 2021

      Remembering back in the early days of the iPod… I had an FM transmitter that plugged into the headphone jack, so I could tune to it and listen to it on the car stereo.

      3 replies 1 retweet 27 likes
      Show this thread
    2. Coraline Ada Ehmke‏Verified account @CoralineAda 13 Jun 2021

      2nd? 3rd? Generation FM transmitter I had, came with a playlist. Each audio file in the playlist was named for an FM frequency. You would play the “song” on the iPod and the FM transmitter would tune itself to that frequency.

      1 reply 0 retweets 8 likes
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    3. Coraline Ada Ehmke‏Verified account @CoralineAda 13 Jun 2021

      I never got a degree, I had to drop out, and back then that was a lot less common than it is now. My resume never made it past a lot of HR folks. So I started in on what was a fairly early e-learning program at some university.

      1 reply 0 retweets 2 likes
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    4. Coraline Ada Ehmke‏Verified account @CoralineAda 13 Jun 2021

      It was a pretty cool program, they let you design your own degree by defining your own learning path. If there wasn’t a class that matched one of your learning objectives, you gave yourself a research and writing assignment, which they would evaluate with a pass/fail.

      1 reply 0 retweets 2 likes
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    5. Coraline Ada Ehmke‏Verified account @CoralineAda 13 Jun 2021

      So what does that have to do with FM transmitters on old iPods? Well, one of my learning objectives had to do with reverse engineering. So I dug into how the FM transmitter was controlled by the audio files in the playlist.

      1 reply 0 retweets 2 likes
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    6. Coraline Ada Ehmke‏Verified account @CoralineAda 13 Jun 2021

      Honestly it was pretty easy to figure out. Looking at the waveform in an audio editor, it was a binary number represented by peaks or valleys at regular intervals representing bits.

      1 reply 0 retweets 2 likes
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    7. Coraline Ada Ehmke‏Verified account @CoralineAda 13 Jun 2021

      I figured out how to bypass the mechanism they used to keep the signal strength below a certain level to conform with FCC regulations

      1 reply 0 retweets 1 like
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    8. Coraline Ada Ehmke‏Verified account @CoralineAda 13 Jun 2021

      …not sure there’s a lesson here, but I did have a vague notion of saying something about keeping things as simple as possible. These folks literally used audio as a protocol.

      1 reply 0 retweets 2 likes
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    9. Coraline Ada Ehmke‏Verified account @CoralineAda 13 Jun 2021

      I mean, think of all the work that would go into a physical interface and display. And would it really be more ergonomic?

      1 reply 0 retweets 4 likes
      Show this thread
       🤷🏻‍♀️‏ @DanielleFong 13 Jun 2021
      Replying to @CoralineAda

      the ipod is a dac that supplies a voltage, nice

      10:12 PM - 13 Jun 2021
      0 replies 0 retweets 0 likes

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