Recording Sounds on a Computer

You can use One to record sounds on to a computer to edit and share.

Audacity, the free sound-editing software, allows you to record from any audio input device. Because audio quality can vary between computers, we recommend using a USB audio device that digitizes sounds in a consistent way, no matter what kind of computer you use. We recommend the AudioTechnica ATR2USB USB Audio device. It is economical and offers good sound quality. (Buy it on Amazon here or search Google in your home country.) Most USB audio devices connect to One in a similar manner and can be used as well.

To connect One to the USB device :

1. Set the stethoscope volume at about 2 out of 10.
2. Set the Filter setting for heart sounds to the second Bell setting. Check out the Filter Selection Instructions.
3. Connect a male-to-male cable between the One and the pink microphone input jack on the ATR2USB device. This cable is provided with your stethoscope, but any male-to-male cables with 3.5mm audio jacks will work.
4. Connect the headphones to the green audio output headphone jack on the ATR2USB device. This allows you to monitor the stethoscope sounds as you record.
5. Connect the ATR2USB USB cable into a computer USB port.
6. Launch Audacity on your computer. Within Audacity, go to the Preferences menu. Click on the devices tab and select the ATR2USB or other USB device as your recording device.  
7. Now you are ready to record. Simply press the red record button on the top of the Audacity window to begin recording. 
8. Once you have finished recording, you can save your recording as a .wav file in Audacity. Matlab can import these files for analysis,  and Audacity can export these files as MP3 recordings. 


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