Raspberry Pi Forums

I am building a simple application using arduino uno and raspberry pi3. The radio feed received through Arduino + TEA5767 - I am recording radio feed into raspberry pi and pushing it to cloud.

I am currently using a cheap sound card that promised stereo mic input, but apparently not so. It records in the radio feed in mono and the quality of the recording is quite poor. I am assuming that this could be due to the sound card or a stereo-stereo pin, as they are only the moving parts in the entire setup. I am connecting one end of the stereo - stereo pin to tea5767 and the other end to the sound card connected to pi.

The quality of sound from Tea 5767 is quite good however, when its gets recorded in raspberry pi through the sound card (which has mono mic) the quality drops below poor.

Is there any sound card that provides stereo recording facility in the range of $5-$6?

bimbilikkibimbi wrote: ↑

Wed Apr 25, 2018 12:12 pm

I am currently using a cheap sound card that promised stereo mic input, but apparently not so. It records in the radio feed in mono and the quality of the recording is quite poor. I am assuming that this could be due to the sound card or a stereo-stereo pin, as they are only the moving parts in the entire setup. I am connecting one end of the stereo - stereo pin to tea5767 and the other end to the sound card connected to pi.

My experience is that most sound cards the microphone input is mono - they might use a TRS (3 position) plug but that's usually to provide a bias voltage rather than being two channels.

You might do better looking for something that has a line input port instead and possibly add a small pre-amp between the radio module and the line input if you need to boost the levels.