Amp (AMP) is a decentralized collateral token facilitating fast and secure payment transactions on the Flexa network. The goal of Amp is to make cryptocurrencies better equipped to be used as everyday ...

Provides banking, superannuation and retirement services in Australia and New Zealand.

In particular he’s using a different pre-amp for an electret microphone, and a low-pass filter with a 723Hz cut-off to reduce harmonic content that was confusing the Arduino’s algorithm.