Brando offers "USB Tube Delight Audio"
Brando is offering an audio solution for your PC, the "USB Tube Delight Audio", that gives the appearance of a vacuum tube system.
Hooked up to your PC via USB, the sound card offers stereo microphone-in and stereo headphone-out.
Measuring around 45mm tall, there are also blue LEDs aplenty. It's on sale now for $32.