[Discuss-gnuradio] Problem with valve and audio sink

[Volker Schroer]

Hi all,

I get an runtime error, when switching a valve.

I saw a similar problem some months ago, but the setup was different.

My setup is quite easy:

A signal source ( cosine, float ) connected to a audio sink.
The same signal source is connected to a valve and the valve is 
connected to a scope sink.

The valve is switched by a checkbox.

Switching the valve leads to

audio_alsa_sink[hw:0,0]: snd_pcm_hw_params failed: File descriptor in 
bad state
terminate called after throwing an instance of 'std::runtime_error'
  what():  check topology failed on audio_alsa_sink(1) using ninputs=1, 
noutputs=0

I wonder how the valve affects the audio sink.

Any ideas ?

Thanks in advance

Volker