slurm —
Silicon Labs USB FM radio device driver
slurm* at uhub? port ?
radio* at slurm?
The slurm driver provides support for USB FM radios
  based on the Silicon Labs si470x reference design, such as the Instant FM
  Music RDX-155.
Programs such as
    radioctl(1) can control the
    device using the radio(4)
    interface. The device supports: querying and setting frequency, volume,
    signal, and stereo status, as well as searching for stations.
The slurm device driver appeared in
  NetBSD 7.0.
The slurm driver was written by
  Jonathan A. Kollasch.