She doesn't wind up taking the repeat; the end of the symphony without it has her playing the final chord when Lord Auditor Vorthys is nearer than anyone she's hoping to evade. She counts out the beats, holds for a moment longer, and then lifts her hands from the keyboard. She has decided that given her choice of titles she's going to address this particular guest as -
"Professor Vorthys."
"Lots of little hacks - and a lot of it inspired by others' work in other domains and a lot of it handled with machine learning rather than directly written code. It matters that there are projectors on both ends - Miles and his father both want versions that look like old fashioned fountain pens and that's been an interesting challenge - and that the pen can 'see' what it's doing from both ends too. But it also senses momentum and hand pressure and tilt directly, and people don't move nearly as fast as the pen can think. You could throw it off if you took it on a fast carnival ride of some kind, but it'll adapt to straight-line acceleration gentle enough that you wouldn't lose your grip on the thing in the first place."
"Well, there's a first batch of the ones that look more or less like this, in various colors and with the option of partially visible electronics, available already - Cordelia has one of those. The fountain pen version will probably not be ready to go for months yet, maybe longer, but I am fairly confident I can do it eventually."
"Tsipis, the business manager I mentioned, accepted a plain one. With the silver casing. I suppose Cordelia might not count, depending on how much native-ness may be acquired over a couple decades' residence."
Madame Vorsoisson offers a slightly nervous smile. "Pleased to meet you, Lady Vorkosigan."
"Likewise. If you don't mind helping me with what you might term market research -" She draws another light-line. "If you acquired one of these to serve portable comconsole functions, would you want it to look about like this, perhaps in a different color, or more like an old-fashioned fountain pen?"
"Oh - a fountain pen, I think," says Madame Vorsoisson, watching the trail of light. "Form echoing function."
"I don't see what the point of it having a nib would be. Does it write from the other end?" he asks.
"It could, but by default, no - gesture-recognition reasons," says Linya.
"It seems useful," murmurs Madame Vorsoisson. "And lovely. But - how do you tell which of your ends is which?"
"So you're selling these," says Tien.
"Yes. Well, the first batch is more or less being given away as part of the initial advertisement. You can have one, if you'll use it in front of people and tell them if they ask where to place orders. But we're out of one of the colors, so it'll have to be black or silver or white."
"I'll take a silver one if you're offering," says Tien.
"I'll let the manufacturer know and they'll send you one," Linya smiles, and she changes pen modes to send this message to the people in physical possession of the pen batch.
"Are you planning to do a similar promotion for the fountain pen version?" asks Madame Vorsoisson diffidently.
"Not on such a scale, but I wasn't planning to charge my husband or my father-in-law, and if they do well enough I need not charge my friends either."
"Can't it just draw out of the other end?"
"I think that might defeat the purpose of having it shaped like a fountain pen, and anyway it does need to be able to project from both sides regardless."
"The fountain version will probably come in other colors, too. Maybe a wood-like finish, or a few choices of same."
"More or less. It comes with a program that can translate most standard comconsole software into pen inputs, and it comes with a basic package already installed. But it won't produce sound except through earbugs - not included because so many people already have a compatible set - and of course comconsoles can't do the freehand drawing and don't network with each other as cooperatively."