Hi Josie,

The 44,100 Hz and 48,000 Hz is the rate at which an audio signal is processed in relation to the signal's variation with time. Below is a simplified image of a sound wave.



Using the above image ...

1. The sound starts at where I've shown.

2. One second later it has traveled up to a maximum value, gone back down past the horizontal axis to a minimum value and then returned back to the horizontal starting line. (I've marked this movement by the red double-ended arrow. It's this horizontal variation in sound that we hear as pitch; the vertical variation we hear as volume.)

3. If a sample rate is 44,100 Hz, the above one-second variation in movement of this sound wave is captured as 44,100 individual snippets of information.

4. If the sample rate is 48,000 Hz, then the variation of the sound wave's movement during one second is captured as 48,000 individual snippets of information.


In going from one sampling frequency to another one, the best method is to use the original data to calculate new values for new rate. There are software programs to do this and it might be that your video software has this ability.

As a consequence of my net searches, I've just stumbled across this ...

link to "Music Editor", a freeware re-sampling program. (I haven't tried it so I have no idea how effective it is.)

Thanks for asking this question! It's inspired me to find out some stuff.

All the best,
Noel

MY SONGS...
Audiophile BIAB 2025