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Kwikstik audio demo - high noise levels - normal?

Question asked by Scott1487 on Oct 26, 2013
Latest reply on Jan 13, 2014 by Zhe Tian

Just got my Kwikstik and ran through the demos.  I tried the 2 second audio record demo and plugged my headphones in to hear the playback.  The noise level - which sounds like an oscillator running at a few kHz - is very high to the point that it's hard to hear the recorded sound over the noise.

 

I wondered about noise coupling in from the PC USB, which shouldn't be a problem, so I tried the demo again with an isolated USB power supply.  Same noise levels.

 

Is this normal?  I didn't expect CD quality but even the demo should record reasonable audio quality.  It sounds to me like there may be a hardware issue coupling noise into the analog section of this board in which case I need to send it back.

 

Has anybody else noticed this?

 

Thanks.

 

Scott

 

Please tell me if this is posted in the wrong place.  I assumed there would be a Kwikstik category but didn't find one.

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