The steps are:
1. Load a monophonic melody (vocal/instrumental whatever you have, tonal/timbre variation is good) into Newtone. If you don't have Newtone you can get it here. You can also skip this step and use Edison edit out a string of notes of the same pitch.
2. Use Newtone to flatten the pitch to a single note (close to the average of the melody).
3. Load the flattened melody into Edison and remove any gaps between notes and other non-melodic noises. 'S,T,C,CH & F' sounds can become unwanted noise 'hiss' after blurring.
4. Add at least 4 seconds silence before and after the flattened melody.
5. NOTE: If your sample is mono, convert it to stereo before blurring it.
6. Apply the Blur tool function with ~4000 ms 'Amount' setting
7. Load the Blurred sample into your favourite sampler. Don't forget to set the root-note to the correct pitch of the sound.