[Camillo]

Could you post a sound clip?

[nandemo]

I don't know if the tritone in the ring grandparent comment mentions is a melodic (2 notes in sequence) or harmonic interval (2 notes at the same time). In any case here is how a tritone interval sounds:

https://www.youtube.com/watch?v=_u9laoGPB_o#t=0m25s