[Discuss-gnuradio] Problem with making sound card as source

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Hi, all

 

My USRP is on delievering, so I try to do someting with the sound card.

 

Unfortunately, the integrated AC97 sound card of my pc seem to not work properly as source.

I connect a mp3 player with the line-in port of sound card with an audio wire.

In a script, the sound card is set to source and connected to a file sink, so the sampled raw audio is written to a file.

In another script, the raw audio file is set to the source and replayed by the sound card as sink.

But, I hear nothing from my sound card.

 

The dialtone.py can work making the sound properly, so the sound card as sink is ok.

 

Hanwen