Severity note: the memory leak is bad enough to warrant higher severity, but there is an easy work-around.
Dear Maintainer,
KDE system monitor shows kmix is using 1.4GB of memory (not shared memory)
$ ps -lC kmix
F S UID PID PPID C PRI NI ADDR SZ WCHAN TTY TIME CMD
1 S 1000 7086 1 0 80 0 - 529188 - ? 03:10:57 kmix
which I think means 0.5G; perhaps the difference is shared memory?
Either way, the useage seems excessive.
See also the very similar bug #723520 which is reported fixed upstream and, I
guess, in some version of Debian. That bug appears to concern an earlier
version of kmix but a later version of KDE than reported here, which concerns
the released versions in wheezy.
* What led up to the situation?
System uptime 67 days. My main use of audio is watching shows from hulu; I
believe these use flash. I have also clicked on the volume icon and adjusted
the volume from time to time.
* What exactly did you do (or not do) that was effective (or
ineffective)?
Quit and restarted kmix.
* What was the outcome of this action?
This reduced memory use:
$ ps -lC kmix
F S UID PID PPID C PRI NI ADDR SZ WCHAN TTY TIME CMD
1 S 1000 25101 1 1 80 0 - 166140 - ? 00:00:00 kmix
and KDE system monitor report 10MB of memory.
* What outcome did you expect instead?
That my sound mixer would run without consuming large amounts of memory.