I currently use JRiver as my playback software. JRiver has a high quality parametric EQ that can be easily used with the filters generated by REW. However, the only way to currently test the filters with REW is to use the RTA feature and a Pink PN file. This doesn't give impulse response or other info from a regular measurement. The OmniMic measuring program provides all of its tones on a disc and allows one to do measured sweeps, etc. through any playback chain. Is it possible for REW to generate other tones that we can use to measure impulse response or can this be added?