In this audio piece titled "Clean Filtered Triangular Sine Wave (Two Octaves)", we're taken on a sonic journey through the world of subtractive synthesis, specifically exploring the virtual-analogue realm. The audio begins with a pure, clean triangular sine wave, which is then meticulously shaped and filtered across two octaves. As we listen, we can distinguish the distinctive characteristics of one-octave waves, marked by their controlled and consistent frequency. This audio piece makes use of Low-Frequency Oscillator, or LFO, a key element in the world of sound synthesis that helps to modify the tone and shape of the wave, adding depth and movement to the sound. Throughout the audio, we can hear the application of Reason, a powerful tool for sound manipulation and creation. The virtual and analogue elements of sound production are beautifully harmonized, providing a unique and immersive auditory experience. In this sample, the concept of subtractive synthesis, a method of sound