When you're ready to record just click on the big red record button (upper left) and you will see your audio file start building with an audio waveform graphically displayed on the time line. This will now start Audacity monitoring audio from the radio and you can see and adjust the audio level coming into the computer by sliding the level control in the upper right near the microphone icon. Click on the recording level meter, the left most meter. Notice the two audio level indicators in the upper part of the screen. Then move over to the right a little ways and click on the microphone icon and choose 'USB Audio Codec' there also. To do this click on the speaker icon near the top center of the page and choose 'USB Audio Codec' from the list. Audacity's inputs and outputs will need to be configured for sending and receiving audio to/from the radio. Once the cable is connected then launch Audacity. Once you have Audacity downloaded and installed plug in the USB cable between your radio and your computer. You can find it at I also have the Icom driver installed on my computer but it might not be necessary for this procedure.

Download the free open source audio editing program Audacity. You do not even need to use the SD card in the 7300. If you have a computer right there in the shack near the radio then you're going to use the computer to record and play back. You don't need to eject the SD card and manipulate the file in a computer before playing back in the transceiver. You can transmit recorded audio files on an Icom 7300 immediately on the fly.

How to play audio through your mic