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In 2002, you could buy a PC motherboard with a sound section amplified by a dual-triode vacuum tube. You can still find them on eBay: http://ixbtlabs.com/articles2/aopentube/

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Reminds me of the people who hook their Raspberry Pi up to a tube amp just to listen to Spotify.

There's still a market for tube amps, although most are external for both aesthetic and practicality purposes.

Guitar amps too!

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