Spektral is a professional real-time audio frequency analyser for sound engineers. Identify feedback frequencies on the go and ring out PA systems with your iPhone or iPad. TWO VIEWS, ONE WORKFLOW β’ RTA (Real-Time Analyser) β live spectrum display with logarithmic frequency scale, 20Hz to 20kHz β’ Spectrograph β scrolling time-frequency heatmap where feedback shows as persistent bright horizontal lines TOUCH-OPTIMISED β’ Horizontal pinch to zoom the frequency axis β’ Vertical pinch to zoom the dB range β’ Drag to pan when zoomed β’ Tap to place cursor with sub-bin frequency accuracy β’ Double-tap to reset all zoom and pan PRECISION TOOLS β’ 4096-point FFT for fine frequency resolution β’ Parabolic interpolation for accurate cursor readings β’ Peak hold with smooth decay β’ Adjustable smoothing and frame averaging β’ Musical note display on peaks and cursor BUILT-IN TOOLS β’ Pink noise generator for reference output β’ Soundcheck mode with automatic peak identification β’ Snapshot compare for A/B analysis DESIGNED FOR THE STAGE β’ Full-screen dark interface for low-light environments β’ Works in portrait and landscape β’ Uses the built-in microphone or any connected audio interface No subscriptions. No account required. No internet connection needed.