How do you think a spectrum analyzer should be used in a car radio? What is the best car stereo you own or have seen that has a spectrum analyzer or similar graphic(s)? The one on my Pioneer AVH-P6300BT and the one on my Kenwood kmm-bt322u are two that I like. But there are a lot of stereos from the 1990s and 2000s that I like. On top of that, doesn’t the stock head unit in some Lincoln Navigators have a spectrum analyzer? I remember very little.
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If it were me, I’d get an Android tablet with Power Amp and use Milkdrop on it.
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It looks like you might not understand what a spectrum analyzer/RTA is.
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I think he has it right…
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I also miss these.
In the 1980s and 1990s, boomboxes and stereos had about 20 band ones, which I thought was cool.
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Construct your own. Not only are they simple to construct, but you can also personalize them to look however you want them to. Simply look up “ESP32 spectrum analyzer” on Google.