Spectrum demo asserts on startup in Linux

Reproduced on both openSuSE 11.3 and Kubuntu 10.04 using the 4.7.0 RC:

jesper@fishmonster:~/dev/qt-4.7.0-rc0-installed/demos/spectrum$ ./spectrum
QObject::moveToThread: Cannot move objects with a parent
Engine::initialize frequenciesList (8000, 11025, 22050, 44100, 48000)
Engine::initialize channelsList (1, 2)
spectrum: pcm_params.c:2348: sndrv_pcm_hw_params: Assertion `err >= 0' failed.
Aborted

BT:
Starting program: /home/jesper/dev/qt-4.7.0-rc0-installed/demos/spectrum/spectrum
[Thread debugging using libthread_db enabled]
QObject::moveToThread: Cannot move objects with a parent
[New Thread 0x7ffff2149710 (LWP 13682)]
Engine::initialize frequenciesList (8000, 11025, 22050, 44100, 48000)
Engine::initialize channelsList (1, 2)
spectrum: pcm_params.c:2348: sndrv_pcm_hw_params: Assertion `err >= 0' failed.

Program received signal SIGABRT, Aborted.
0x00007ffff5ae5a75 in *__GI_raise (sig=<value optimized out>) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
64 ../nptl/sysdeps/unix/sysv/linux/raise.c: No such file or directory.
in ../nptl/sysdeps/unix/sysv/linux/raise.c
(gdb) bt
#0 0x00007ffff5ae5a75 in *__GI_raise (sig=<value optimized out>) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#1 0x00007ffff5ae95c0 in *__GI_abort () at abort.c:92
#2 0x00007ffff5ade941 in *_GI__assert_fail (assertion=0x7ffff587c439 "err >= 0", file=<value optimized out>, line=2348, function=0x7ffff58855c0 "sndrv_pcm_hw_params")
at assert.c:81
#3 0x00007ffff5827203 in ?? () from /usr/lib/libasound.so.2
#4 0x00007ffff5822b93 in snd_pcm_hw_params () from /usr/lib/libasound.so.2
#5 0x00007ffff79c1206 in QAudioDeviceInfoInternal::testSettings (this=<value optimized out>, format=...) at audio/qaudiodeviceinfo_alsa_p.cpp:355
#6 0x000000000040bf62 in Engine::selectFormat() ()
#7 0x000000000040c5af in Engine::initialize() ()
#8 0x000000000040d85b in Engine::Engine(QObject*) ()
#9 0x00000000004106f1 in MainWidget::MainWidget(QWidget*) ()
#10 0x0000000000409439 in main ()