On Aug 19, 7:47 pm, Jerry Avins wrote:
Radium wrote:
Other than the microphone [obviously], why does there need to be any
moving parts? If a digital audio device can play audio back without
any moving parts, why can't an analog audio device be designed to do
the same?
Describe a motion-free process of recording and playing back. Cutting
grooves on a disk or magnetizing a moving tape both involve motion.
The iPod is motion-free yet it's still able to record and playback.
Those Nintendo Entertainment System cartridges were able to playback
without any motion.
The device below is *not* analog. It uses sampling so its digital:
http://www.winbond-usa.com/mambo/content/view/36/140/
I'm curious to why there are no purely-analog devices which can
record, store, and playback electric audio signals [AC currents at
least 20 Hz but no more than 20,000 Hz] without having moving parts.
Most of those voice recorders that use chips [i.e. solid-state] are
digital. Analog voice recorders, OTOH, use cassettes [an example of
"moving parts"].
It's this simple: nobody has invented a way. I doubt than anyone ever
will. If you know how, communicate with me privately.
I don't know how but I guessing that it involves the analog equivalent
of Flash RAM [if re-writing is desired] or the analog equivalent of
Masked-ROM [if permanent storage is desired].