Waveshield signal flow, signal to noise ratio

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joshuapenrose
 
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Joined: Thu Dec 30, 2010 9:46 pm

Waveshield signal flow, signal to noise ratio

Post by joshuapenrose »

I'm Working on a project with several waveshields. Great so far! Thanks for a great product.

My question is regarding the induced noise. I'm starting with 44.1k audio (using the WaveHC library) with negligible noise. Then I'm going from the shield into a class-D, 25Watt amp. Everything works great! So I should just be happy, right?

But there's a bunch of induced noise! I know the files on the card are high signal to noise. So is it coming from the DAC process? the op-amp? I know the DAC is there to stay, but would it help to bypass the op-amp? Is there any other way to get the noise a little lower?

Thanks for any comments!

Joshua

adafruit
 
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Re: Waveshield signal flow, signal to noise ratio

Post by adafruit »

the arduino is not a low-noise device, and the DAC is only 12 bits. its not a CD-quality audio player.

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