F. Inharmonic

Not all sounds have harmonic overtones. Many strings produce inharmonious higher overtones, because of the tension of the excited string. The higher overtones are higher than one would expect.

Open tube instruments like trumpets produce overtones with less frequencies than the root frequency because the higher overtones dive deeper into the open end of the tube before they are reflected.

The most instruments with vibrating surfaces ( Bells, Drums, Percussion's ) produce overtone spectra with non multiple integer overtones. (example bell : 1 , 2.71 , 5.24 , 8.58 , 12. 6 …)

The best technique to simulate such inharmonious sounds is to record them with a microphone, analyze the spectrum and take the data (amplitude, frequency, decay-factor) of each overtone to re-synthesize the sound. You can do this by pressing the FFT-button, select a wave file (of for example a bell) and let the computer do the job. After you have generated such a large set of data, you can modify it manually to create new (unnatural but good) sounds.

Alternatively you can construct your own inharmonious (but well sounding) waves by selecting the desired overtone spectrum, amplitude spectrum, waveform and detune-style. You can also set all this parameters manually in the “Free Style” mode.