4-Hydroxy-di-isopropyl-tryptamine (4-HO-DiPT) is a synthetic hallucinogen. It is a close structural analogue of psilocin and classified as a tryptamine derivative. It goes by the street names "Ho-Dipped", "Tangerine", "Jitter", "Phour", and in areas of California in the Los Angeles county, "Aura".
Some users have reported a minor audio distortion with lower dosages. Higher dosages increase the polarity of the distortion. It is defined as being slightly lower in pitch and creating several different effects, such as pitch bend, volume distortion, and rate distortion. As with most DiPT psychedelics, music can become more dissonant and less harmonious. Users have also reported a visual distortion widely comparable to the hallucinogen LSD.