Research

Voice models can now sound human. In a group, they still interrupt, stay quiet when someone asks them a question, or answer the wrong person. Our work is about the part of conversation that is not words: who has the floor, when it changes hands, and what silence means.

The room. Six people and one machine at the head of the table. Columns rise with each voice, rings are the sound reaching the room, and the line from the centre points to whoever has the floor. Drag to turn it. Point at a seat to talk over the room.

Questions we are working on

Some of these have partial answers in the literature. None of them have answers that hold up in a real meeting.

  • When should a machine in a group stay silent? Most of the time, the right move for an agent in a meeting is to say nothing. The hard part is knowing the few moments when it is not.
  • Can one model hear six people as six people? Voice agents today receive a meeting as one mixed signal. People do not hear a room that way.
  • How fast is fast enough? People in conversation leave about 200 milliseconds between turns, in every language that has been measured. A machine that needs a full second of silence is always late.
  • What does an interruption cost, and who pays for it? Talking over someone and waiting too long are both failures. We want to measure them in the same units.
  • Does timing learned in simulation survive a real room? Synthetic conversations teach content well. Whether they teach timing is an open question, and we intend to measure it.

Index

Models, benchmarks and environments in progress. Entries become links when they are published.

WorkKindStatus
Floor: a small model for turn-taking in groupsModelUnderway
Turn Bench: measuring when agents should speak in multi-party audioBenchmarkForthcoming
Chorus: full-duplex listening across many speakersModelEarly research
Agora: simulated meetings for training conversational timingEnvironmentBuilding
redacted title of a forthcoming paperPaperForthcoming

A machine has three jobs in a conversation

To listen while others speak, to decide, and to speak. Kempelen's machine of 1791 had three parts too: bellows that take in air, a reed that makes the voice, and a mouth that shapes it.

Detail of an engraved plate of Kempelen's speaking machine, showing a box and folded bellows.
Listen. Kempelen, 1791, plate detail.
Detail of an engraved plate of Kempelen's speaking machine, showing levers and fittings.
Decide. Kempelen, 1791, plate detail.
Detail of an engraved plate of Kempelen's speaking machine, showing a bell-shaped part in section.
Speak. Kempelen, 1791, plate detail.

Work with us

We are open to research collaborations on multi-party turn-taking, full-duplex dialogue and conversational benchmarks. If you run a lab or a challenge in this area, we would like to hear from you.