[GreenKeys] Loop over IP

[epvgk at limpoc.com]

On Mon, Aug 01, 2022 at 02:14:45PM -0700, Harold Hallikainen via GreenKeys wrote:
> As far as audio, my DSP TU (https://w6iwi.org/rtty/DspTU/ ) uses 12 bits
> per sample at 8 kHz sample rate. The 12 bits per sample is because that's
> the size of the ADC on the chip. All calculations are then done as double
> precision floats. In general, I think 8 bit at 8 kHz would handle RTTY
> fine.
> 

I'm sure you're right. I implemented a (very basic) fixed-point FFT demodulator on AVR 
using the onboard ADC which ended up at about 12khz sample rate, but the limiting factor 
was probably the ADC.  Worked fine with afsk audio fed right into the ADC input pin, as
long as you adjusted the level carefully to not clip.