Follow the steps below, in the order they are written:
1. Connect the One to the lower left jack on the Thinklink box, which shows an icon that looks like the profile of the One. Use the long 3.5mm Male to Male audio cable supplied with the Thinklink.
2. Connect headphones (earbuds or others) to the upper left jack, signified by a headset icon.
3. Connect a short 3.5mm to 3.5mm Male to Male audio cable (or right angle male-male connector) to the lower right jack on the Thinklink. This is identified by a rectangle icon, indicating a smartphone or tablet.
(See the attached image.)
4. Set the SOURCE switch to the middle position.
5. Set the MONITOR switch to the left position, so that you can monitor the stethoscope sound during recording.
6. Launch the Stethoscope App. Recording commences automatically. Tap the display to stop recording.
7. Plug in the male 3.5mm short cable (or right angle connector) into the iPhone/iPad headset jack. As When you make this connection, observe the upper left region of the screen for a "Headset" message. This indicates that the iPhone/iPad has switched it's audio source from its built-in mic to capturing audio from the headset jack i.e. the stethoscope. If the message indicates "Built In Mic", withdraw the plug and reconnect. (The device makes an automatic selection.)
8. Turn on the One and begin recording (tap the red button icon on the upper right on the screen). Adjust the volume on the One to a medium level. If the One is too loud, the App will indicate this with a "Stethoscope Too Loud" message. Set the volume as loud as possible without triggering this message.
9. Touch the screen to stop recording. Zoom in and out with thumb and forefinger to display the desired audio segmentr. Then touch Edit [E] > Trim to Displayed to trim the recording to the displayed segment.
10. Slide the MONITOR switch to the far right and touch the Play icon (>) to play back the recording and monitor it via the headphones. Note: Slide the MONITOR switch to the middle position (not right position), in order to hear the stethoscope in one ear and the playback in the other. This is primarily used for videoconfencing applications, in order to hear the local stethoscope and the remote clinician simultaneously.
NOTE: The iPhone/iPad has a mind of its own when it switches from built in mic to headset. If the switchover does not occur, you will record room sound instead of stethoscope sound. If this occurs, try disconnecting the iPhone/iPad and then reinserting the plug. Make sure that switches are SOURCE=middle, MONITOR=left and that the stethoscope is turned on.
If you are getting a straight line when recording, then your Mic is not turned on for the App:
-Make sure to allow the App to access the iPhone mic when it asks.
When starting a recording, wait for about 5 seconds for the App to get adjusted and then it will start recording.
If you are only hearing out of one earbud or headphone when playing back a recording:
-Unplug the headphones and stethoscope cable from the Thinklink, exit the App, plug headphones back in as far as they will go, and re-open App.