[Ryan] wanted a spectrum analyzer for his audio equipment. Rather than grab a micro, he did it the analog way. [Ryan] designed a 10 band audio spectrum analyzer. This means that he needs 10 band ...

The NanoVNA made network analyzers cheap enough for almost everyone ... or you might be able to do a software solution. If you only need audio frequencies and you want novelty, try some ping ...

Addressing this issue, Yokogawa Test & Measurement recently released the AQ6361 optical spectrum analyzer (OSA). It's ...