2. What you record and what you hear is the same because you use better recording and playback equipment
3. There are linear distortion and non-linear distortion, and if it is non-linear, what you hear is generally not what you record, because of clipping.
4. The sound recorded with professional software is not necessarily good, because it involves the environment you are recording in, the microphone you are using, your sound card (AD-DA) converter, sampling rate and sampling accuracy.
5. What is your real voice, the answer is that no matter how it is your own voice, depending on what effect you want, you think the sound is your is your voice, the sound is not good or bad, only appropriate and inappropriate points.