How to set up volume control on a DAC without a preamp

I would also be concerned driving an amp directly from a DAC. Roon has had a bug in past that caused the volume to ramp to 100%. Could be catastrophic under the wrong circumstances.

you can buy dac with Exellent volume control - APL hifi dac or Playback design dac.

Thank you for all the responses.  I have been looking at DAC's around 3k-4k.  They include some older Mojo Audio DAC's, Denafrips or Holo Audio.  I have also seen the new Musetec DAC that was just released.  The preamps I was want  is  the Spatial Audio Raven or having SMc Audio build me a TLC-2 to match my SMc DNA .5 modded amplifier.  None of these DAC's except the Musetec have  volume control and I won't be able to purchase the DAC and preamp at the same time.  I did however find some inexpensive ideas until I can get a preamp.  

I have used the ps audio dac with Ethernet for years and had Roon use the dac as an endpoint which I controlled the volume thru Roon. 
Since I wanted to use i2s, I am using the airlens in front of the dac and Roon connects to the airlens as an endpoint.

Since I got rid of all my vinyl and analog pieces when I was using dsd and MQA, I also got rid of my McIntosh preamp, after I tested the sq with and without the preamp, and my system sounded better without the preamp.

I have 2 Benchmark LA-4 pre amps. Love them.  Rory at Benchmark is great to deal with. Reasonable price, 30 day trial period, Made in New York. Adjustable bias, etc. Robert TN   Bet you keep it!!