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Low noise adjustable reference for 24-bit audio R2R DAC

Good day,

I'm looking for a low noise voltage reference for a 24-bit R2R DA converter (audio equipment). Reference voltage is +9V. Supply voltage is +12V. Maximum Vpp=268nV, Vrms=45nV. 
Can you recommend something from your products?
I look for LTC6655 in Low Noise Precision Voltage Boost Circuit (see attachment 1). But I don't know if this circuit have sufficiently low noise.
Next choice is in attachment 2. This schematic is from this web: 
As the reference i use LTC6655 in voltage boost connection. (see attachment 3).
Or do you still have a better solution?
Thank you
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