Sydney based Sinusoid Pty Ltd today introduces AKLite 1.0 for the iPhone and iPad, a real time spectrum analyser for audio. Fast Fourier Transform is used to calculate the frequencies in the Spectrum Analyser and displayed in real time. The frequency is displayed in either logarithmic or linear scale and this is selectable. The FFT length used in AKLite is 2048, giving good resolution of frequencies. Interpolation gives resolution to within 1Hz.