Re: Users of 2 metre Amateur Band?
A refinement of that system would be to have the unit generate PCM / PWM synthesised speech, to be injected into the receiver audio path, so that it would audibly announce the current setting - similar to the way radios are often adapted for use by white-stick operators.
I don't think the average PIC has enough non-volatile / code memory to hold that much synth speech, through. The speech might have to be programmed into / held on a separate serial-access flash memory IC.
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