What kind of diagnosis are you gonna perform?

Seems like you don't understand what an analog signal is

Are you getting the signal from an old turntable or something? Else, I am confused by this question as well

If your ML is running on a computer, it's digital. If your ML is running on some bare metal capacitors/ inductors circuit board then sure, keep it analog.

You will probably be having trouble working with Audio if you don't know The basic things like analogue and Digital

I really hope it’s the latter

You need to freshen up your DSP knowledge

:/

You already have an A-D converter. It's built into every laptop or computer.

Just plug whatever analogue source you've got into the computer's audio input, and you will instantly have a digital version available to you to record or turn into a spectrogram.

OP must have built their own neuromorphic chip

Sorry for not making this clear-

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I'm using a microphone to record sound and then running it through a machine-learning model. The main hardware components will be the microphone and a Raspberry Pi, which will hold the program.

>I'm looking at creating the machine learning model either on a custom app or using a Raspberry Pi.
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>From what I'm understanding, it should be digital if run on the app, and analog if run on Pi. Is this correct?
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>So sorry for all the questions, this is still new to me :)

Sounds good! Is this the same process for microprocessors and such (Raspberry Pi)?

Functionally, the process is the exact same as you would do on a computer, but for these, yes, you will need an ADC module. (as the Rpi doesn't have an audio-in built in).

For sanity's sake, I would recommend getting something like a USB audio interface, or a dedicated audio ADC module that contains all the audio stuff (rather than working with a generic ADC and trying to make it work for audio). Something like: https://thepihut.com/products/hifiberry-dac-adc might be a good option to start with, perhaps?

Any software that processes audio uses a digital representation of audio. Only when designing circuits would you ever be dealing with analog signals, for example a guitar amp.

You may be confusing analog/digital with the concept of time-domain (waveforms) vs frequency domain (spectrograms).

Sounds good! So just confirming, if I plan to use a raspberry pi, it would make sense to invest in an ADC module compatible with pi, correct?

Yes. Or I believe you can use a USB mic that is compatible with the pi.

Okay, so if I already have a USB mic compatible, I don't need the ADC converter?

Sorry for all the questions and thank you for your help!

Yes, exactly.

A USB mic is a normal mic that has a hidden built-in adc.

It sends you the digital signal over the USB cable.