Good app, lets see more!

This is a nice app that delivers an easy-to-read spectrograph. In future releases, it would be nice to see:
1. External mic capabilities - the mic in the phone isnt that great, can I plug in my own via headphone jack?
2. Choice of scale for dB meter on the side. Im not sure what scale is currently used, but I take my readings in dBA/dBC.

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