mr spectra is an fft based audio spectrum analyzer with built-in weighting filters (A-weighting for human hearing, C-weighting for machine sounds and Z-weighting with no filter). Enjoy mr spectra with your music as a musical mood light. Quick tips: * Go to settings and add a decibel, wave or spectrogram scope. * Swipe screen to zoom in or out on frequency and amplitude scales. * Display or hide the X and Y axes. Show or hide the dB and Max dB values. * Reset Max dB. * Move the dB and Max dB values anywhere on the screen by dragging. * Pause/ Play the running spectrum. * Hide menu and play/pause buttons. * Change spectrum color scheme from the app menu. Display Settings: * Select color scheme. * Solid bars or line graphs. * Landscape mode to mirror screen on to your TV. * Show/ hide axes. Scope Settings: * Decibel Scope. * Sound Wave Scope. * Spectrogram. Decibel Settings: * Use A-Weighting, C-Weighting or Z-Weighting filters (dBA, dBC, dBZ). * Show decibel and Max dB values. * Set zero dB level. FFT Options: * Use Hann or rectangular windowing. Technical Details: * Input source: device mic. * Sound captured: 16-bit PCM mono. * Sampling rate: 44.1 kHz. * Audio amplitude range: 1 to 32767. * FFT latency: 23 ms. * Decibel calculations: based on rms amplitude, relative to a base level of 1 rms. The base level can be adjusted by user to calibrate dB levels.