asterisk users - Aug 2007 - chan_alsa - no sound / strange sound - 1.4.9

Hi

some problem with chan_alsa. Depending on the configuration I don't
get any sound output (output_device not set in alsa.conf - same as
output_device=default) or very strange output (output_device=hw:0,0)
when dialing into something like

exten => 10,1,Answer
exten => 10,n,Playback(soundfile)
exten => 10,n,Hangup

Other alsa applictions do work without problems and for example this
simple test does work:
aplay -D default /usr/share/sounds/alsa/Front_Center.wav

Installed is Asterisk 1.4.9 on a box with (standard) Debian Etch.
There is no /etc/asound.conf or ./asoundrc. It is only one audio
controller available.

Any help appreciated

-- 
Stefan Tichy  ( asterisk at pi4tel dot de )