Posted by Joe Smith on 07/23/06 10:05

Alpha wrote:
> "Joe Smith" <joe@inwap.com> wrote in message
>> Yes, but why 44.1 KHz, and not 44.0 or 48.0? There is a specific
>> reason why 44.1 was chosen.
>> -Joe
>
> I meant as a multiplier of rate and scan frequency.

Yes, it was due to modulating the digital audio onto a video-compatible
signal, and using a video tape recorder to store the data.

Three stereo 16-bit audio samples (96 bits) stored per scan line.
Subtracting the lines lost due to vertical blanking and other overhead,
490 of the 525 NTSC lines were used to store data.

3 samples/line * 490 lines per frame * 30 frames per second = 44,100 samples/second.

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