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** Changed in: unixcw (Debian)
       Status: New => Fix Released

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https://bugs.launchpad.net/bugs/513957

Title:
  CW output tone is "ringy" on some audio devices

Status in “unixcw” package in Ubuntu:
  New
Status in “unixcw” package in Debian:
  Fix Released

Bug description:
  Binary package hint: unixcw

  For some audio devices (soundcards) the Morse code 800 Hz output tone
  generated by cwlib is "ringy" (sounds as if it is being modulated by
  another tone).

  The 'cwlib' library tries to set the DSP sample rate to 8192 Hz and
  the fragment size to 2^7 == 128.  On audio devices where a different
  fragment size is returned for that rate, the audio output sounds
  "ringy":

  TESTCASE:
  $  echo T  |  CWLIB_DEBUG=0x4  cw -w 4  2>&1  |  grep fragment
  cw: dsp fragment size not set, 131

  (For audio devices which accept that fragment size and rate, the
  "fragment size not set" line will not appear and the tone will sound
  fine).

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