Voice recording: fading in and out

For a Musical Interval Training app/ITune I’m working on, I have been trying to get a nice sound when speaking the intervals (e.g. “minor second”). One aspect of making it nice is a fade in and fade out to remove the background hiss before the voice cuts in. I’ve put an example on SoundCloud (see link below – the voice is not mine, as any fule doth know) of the after-sound. It’s recorded using the Roland R-05 mentioned elsewhere here, and the recording is edited using Sony SoundForge 10. SoundForge works fine on Windows 10.