Music changes the way food tastes, chocolate should only be eaten with the eyes closed, playing a syncopated jazz rhythm to salmon while it's smoking makes it more delicious, eating desserts from our childhoods invoke nostalgic memories. Over the years at Spier's annual Secret Food Festival, speakers from around the world have delighted audiences with weird and wonderful theories about food. Last year the festival went interactive - participants tasted insect cookies or sampled flavours while listening to music. This year, along with making their own algae to eat, participants will experience new food sensations with the following speakers:MARIE AOUNThe owner of Saint d'Ici Perfumes, this Joburger obtains natural ingredients from small-scale farmers and artisan distillers to be crafted into limited edition scents.DE MELKSALON (THE MILK SALON)Sietske Klooster is a Dutch industrial designer fascinated by the idea that milk, like wine, has ''terroir" - depending on the soil and vegetation that the cows graze from, the breed of the cows and the seasons.ASH HEEGERAfter stints at The Test Kitchen and Dinner by Heston in London, the SA-born chef's new Cape Town restaurant, ASH, focuses on charcoal-cooked pasture-reared meats.FREDDIE JANSSENThe author of Pickled and founder of F.A.T , a pop-up cafe and supper club and purveyor of pickles, kimchi, and sauces.MPHO TSHUKUDUA registered dietician, she uses food and its nutritional compounds to promote optimal health. - Andrea NagelFor more info and to buy tickets go to spiersecret.co.za. The festival will be held on Sunday from 9am to 6pm at the Central Kitchen at Nando's HQ in Lorentzville, Johannesburg..