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From: Andrew <andrew@spam.net>
Newsgroups: comp.mobile.android
Subject: Re: Android keyboard: your choice.
Date: Sun, 23 Jun 2024 07:50:30 -0000 (UTC)
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Arno Welzel wrote on Sun, 23 Jun 2024 03:01:11 +0200 :

> It depends on the device. Newer devices have a "TPU" which can handle
> speech recognition offline. However older devices may not be as powerful
> to do this and always rely on a server.

When I looked up TPU, I thought it meant "text processing unit" but it
really means "tensor processing unit", apparently, which is confusing.
 <https://medium.com/@champion_icterine_goldfish_62/how-googles-tpu-technology-may-improve-ai-capabilities-of-samsung-galaxy-s25-series-1a3c6274040f>

> Simple test: enable airplane mode to disable any kind of network
> connection and see, if speech recognition still works. In my case, on a
> Google Pixel 6a, this is the case - Google speech recognition even works
> without any active network connection at all.

Ah. <slaps head!> How stupid of me. That's a great idea. 

That's a sensible idea, which I should have thought of, so thanks for being
kind in suggesting that I put the phone in airplane mode first.

1. For the Samsung Keyboard microphone, STT failed in airplane mode
   saying "No network connection".

2. For the OpenBoard keyboard microphone, STT worked in airplane mode.

3. For the HeliBoard keyboard microphone, STT worked in airplane mode.

4. For the Google Voice Typing microphone, STT worked in airplane mode.

The good news is both HeliBoard and OpenBoard (which, as far as I can tell,
are equivalent in most ways) do not need the Internet in order to do STT.

Thanks for suggestion that quick test.