A dominant eleventh flat ninth chord is composed using a root/1st, major 3rd, perfect 5th, minor 7th, minor 9th and perfect 11th (or R/1-3-5-♭7-♭9-11) intervals played simultaneously. Generally written as C11(♭9) or Cdom11(♭9), it is good practice to simply use an uppercase C followed by a super scripted 11(♭9) to represent it in writing (ie: C11(♭9)).
Dominant eleventh flat ninth chord profile
|Intervals||root/1st, major 3rd, perfect 5th, minor 7th, minor 9th, perfect 11th or R/1-3-5-♭7-♭9-11)|
|Common names (examples in C)||C11(♭9), Cdom11(♭9)|
|C Dominant eleventh flat ninth chord voicing #3|