SpectrumGen is a spectral synthesizer with a minimalistic pixel interface. It's a bit like the PixelWave, but now you can draw the spectrum of sound! Also available for iOS. Key features: • it is possible to draw the spectrum and play it at the same time; • export to WAV; • eight predefined timbres; • changeable number of octaves (from 2 to 8); • USB MIDI input (Android 6+). Dark colors - low frequencies (bass). Bright colors - high frequencies. Known solutions for some problems: https://warmplace.ru/android