2025-08-14 00:00:00 You can practice receiving Japanese sentences using a random generator. You can also freely select the playback speed and tone. There is also an adjustment function (5 levels) for the space ratio between generated codes. The Pro version's functions include the noise superimposition function and QSB function to reproduce an environment close to actual communication, and the function to generate echo (reverberation) to simulate a Morse test venue. For chord listening, you can select repeat from endless, 10 minutes, 20 minutes, 30 minutes, 60 minutes, or 120 minutes.