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An app is considered for the Ubuntu smartphone that involves:

  1. Monitoring low voltage, compound analog wave forms with a peak frequency component of 4.4 MHz.
  2. Uploading faithful digital equivalents in a cloud.
  3. Downloading from the cloud processed digital equivalents.
  4. Converting the stream of the digital equivalents into faithful, low voltage compound analog wave forms that include a peak frequency component of 4.4 MHz.

My question is: can the Ubuntu smartphone carry out all the above activities? If not, then which of the above activities can it carry out?

I'm looking forward to your comments.

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2 & 3 would be trivial as Qt has very good APIs for dealing with this kind of thing.

1 & 4 would require extra A/D and D/A hardware interfaced to the phone somehow. This presents a problem as there are multiple ways of interfacing and every phone supports a different subset of these standards. Assuming your phone supports USB-OTG then this would be quite easy. You would simply communicate with the hardware using libusb, much as you would on a normal PC.

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