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Thread Starter 

Hey folks, hoping someone can help me find something I've previously used, but that no amount of googling or browser history search can reveal.

 

It was a tone generator, the best I've used.

 

It was a grid. Along the top on the x axis, were all the different tones. From 10hz to 20-something khz. Along the left side, the y axis started at something like +10dB, descended to 0, then onto -10dB.

 

The genius was that you'd start in the middle of the tone spectrum at 0dB, then work through the other frequencies, hunting for spikes and drop-offs in your headphones.

 

Anybody have a clue what I'm talking about? Thanks for any help.