It seems like many of these ADCs have either single-ended inputs or differential inputs, and only a +5V "analog" power supply. What's good for a music production standpoint, and how is this measured? How do I measure how "good" the ADC is? It seems there's a wide price range, from ~$2 to ~$16 chips with the same capabilities in terms of sample rate and bit depth. Is this the "0dB" level? So I need to scale ~11.2x down (gain = 0.0894)? Or is this the "-10dB" level? In this case how do I scale it? What is the scaling that I need to do for regular consumer line level? Wikipedia says consumer line level is -10 dBV = 0.894Vpp. So, in Eurorack, 10Vpp is the maximum, so "0dB". I did some reading up on Wikipedia, but I was left with more questions than it answered. I'm a little bit confused by the audio levels. Please feel free to answer with direct answers or links to further reading if you would be so kind :) For the majority of this post, I'll be referencing this ADC as an example. The microcontroller will behave as a USB device, which will send the data to my DAW.
This will be fed into some sort of microcontroller (I'm kind of partial to the Atmel chips since I've worked with them in the past). 24 bit, selectable sampling rate (I think 44.1kHz and 48kHz are the most useful?) It looks like most of these output in I 2C format. I was looking at ADCs on DigiKey, and I saw a few that seemed to work. I will amplify (deamplify? reduce?) that down to ~3Vpp (or whatever the proper level is). Here's the general idea: I'm taking 10Vpp audio in (Eurorack format). Because I'm near-clueless on the topic, I don't even know what sorts of questions I need to ask Google. Until then, I have a lot of reading up to do. So I'm considering building an audio interface in the future.
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