9 Jul
2023
9 Jul
'23
12:31 p.m.
On 07/09/2023 1:46 PM CDT Douglas Taylor via cctalk
<cctalk(a)classiccmp.org> wrote:
I was surprised to see that it took ~34 ms to run through all the
numbers from 0-7777, that is about 34 Hz. The manual says the 'settling
time' is 6 microseconds. Is this fast enough for audio?
How would you convert a modern audio file into 12 bit integers?
Doug
If you put out 4096 samples in in 34 ms, that means you are putting out ~139,000 samples
per second. Telephone audio is generally 8000 samples per second. CD quality is 44,100.
So you can easily put samples out fast enough. If you just feed a bitstream to the DAC
you shouldn't have any problems. If you try to do any processing in between, ymmv.
There are various programs around that will convert different audio media to just about
anything. Take a look at Audacity. I "think" it will do what you want.
https://www.audacityteam.org/ It's cross platform, but I don't think PDP-11 is
one of the ones it runs on :-)
Will