- Born
- Died
- Birth nameRoberto del Rosario
- Bert del Rosario was born on June 7, 1919 in Pasay, Philippines. Bert is known for Florinda (1973). Bert was married to Eloisa Vistan. Bert died on July 30, 2003 in Manila, Metro Manila, Philippines.
- SpouseEloisa Vistan(? - 1979) (her death)
- ChildrenRon del Rosario
- ParentsConsolacion LegaspiTeofilo del Rosario
- RelativesEduardo "Guy" Ilacad(Niece or Nephew)Art R. Ilacad(Niece or Nephew)Vic Del Rosario Jr.(Niece or Nephew)Carmen del Rosario(Cousin)Chito Ilacad(Niece or Nephew)Teresita R. Cruz(Niece or Nephew)Orly Ilacad(Niece or Nephew)Sunny Ilacad(Niece or Nephew)Ricky Ilacad(Niece or Nephew)
- His company Trebel manufactured harpsichords and the OMB, or One-Man-Band, a piano with a built-in synthesizer, rhythm box, and bass pedals that can all be played at the same time. Trebel was a popular brand of acoustic upright pianos in Philippines in the 1970s to 1980s.
- Was the president of the now-defunct Trebel Music Corporation, a piano company in the Philippines.
- His company name is Trebel, a portmanteaus of his name and wife Eloisa Vistan. Treb is Bert spelled backwards and El is for his wife. It was founded in 1962.
- He also developed and patented a singalong machine using "minus one" technology (originally on cassette tapes) in which vocals are subtracted from extant instrumental tracks.
- He never received formal music education but learned to play the piano, drums, marimba, and xylophone by ear.
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