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[Discuss-gnuradio] Problem with valve and audio sink

From: Volker Schroer
Subject: [Discuss-gnuradio] Problem with valve and audio sink
Date: Mon, 06 Dec 2010 17:23:15 +0100
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv: Gecko/20101027 Thunderbird/3.0.10

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


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