[Date Prev][Date Next] [Thread Prev][Thread Next] [Date Index] [Thread Index]

Bug#567397: marked as done (unixcw: CW output tone is "ringy" on some audio devices)

Your message dated Fri, 5 Sep 2014 10:08:39 -0700
with message-id <CAHipecBB5vob5F7iWS4jSHn=WOOQKb+Romg+xv+a2n=39Bnw=g@mail.gmail.com>
and subject line Re: unixcw: CW output tone is "ringy" on some audio devices
has caused the Debian Bug report #567397,
regarding unixcw: CW output tone is "ringy" on some audio devices
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
message is talking about, this may indicate a serious mail system
misconfiguration somewhere. Please contact owner@bugs.debian.org
immediately.)


-- 
567397: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=567397
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message --- 
Package: unixcw
Version: 2.3-13
Severity: normal


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).

--- End Message ---
--- Begin Message ---
​​Yes, this bug is a relic from the /dev/dsp age.  I can no longer reproduce it with 3.3.1 and a PulseAudio sound system.  Closing the bug.  Thanks Colin!

 -Kamal

​


--- End Message ---
Reply to: