I am frustrated with the sound from my DAC

Here is my recommendation for your ‘harsh sounding DAC issues.

i bought a LUMIN D1 5 years ago (uses the Wolfson DACS) - unbelievably good sound for 5 years. LUMIN mates the streamer to the DAC and generates the best sound - they have the best I pad interface - gets continually updated by LUMIN via the internet.  You just have to hard wire via Ethernet cable to the LUMIN and run to your preamp either balanced or unbalanced ICs.

i just upgraded to the LUMIN T2 - (uses Saber DACS) - sound quality took another leap forward - more detail - bigger soundstage - lower floor - I am relistening to all my favorite albums (Tidal HiFi with MQA ) and I am hearing more detail than ever before.

Do yourself a favor - go with LUMIN and get back to enjoying the music.

Happy Listening 

Why don't you just switch over to the Cambridge Audio DAC Magic plus and sell the Peachtree?  Unless you're the designer of the Peachtree, it seems like you've found a totally reasonable solution.

Always preferred Wolfson sound as far as chips go all the way back to my Cowon Z1 which still sounds better than my Astell&Kern.

Same experience here. Went from Cambridge with Wolfson to SABRE in Peachtree and never satisfied. Despite much higher price of the latter. Now changed back to the latest from Cambridge. Not near the end of the DAC road, but farther along.

If your DAC sounds a bit harsh with too much "sssss", check out an old Theta ProBasic III. You might be pleasantly surprised for like $500 or $600. I was.