Pull up the following revisions, requested by mrg in ticket #1948:

usr.bin/audio/common/auconv.h                  up to 1.6
usr.bin/audio/common/audio.c                    up to 1.27
usr.bin/audio/common/decode.c                  up to 1.2
usr.bin/audio/common/libaudio.h                up to 1.22
usr.bin/audio/common/sun.c                      up to 1.11
usr.bin/audio/common/wav.c                      up to 1.22
usr.bin/audio/play/audioplay.1                  up to 1.34
usr.bin/audio/play/play.c                      up to 1.64
usr.bin/audio/record/audiorecord.1              up to 1.45
usr.bin/audio/record/record.c                  up to 1.58

- support for playing 32-bit and 64-bit IEEE FP .wav files
- support for recording 24 bit .wav files
- read-overflow fixes for .wav files, and other fixes for the
  wav parser
- audioplay gains -n flag (no play, like make -n)
- audiorecord manual gained useful examples

(martin)