I am now testing out the "light weight" FW2.1 without the unused Android services from Lurker and have spent more time with it. Previously I hated the sound signature of the FW2.1 so much that I reverted to FW2.0.5 after only listening for 15mins.
I still much prefer the sound signature of the FW2.0.5.
After spending more time with the FW2.1, I find it does sound "Cleaner" with well mastered tracks. But with any lossless track less than perfectly mastered, the FW2.1 sounds awful. FW2.1 sounds very similar to my desktop setup's J. River Media Center's "Flat line Overflow" setting, which is with the clip protection disabled. I found compressed MP3 will sound actually better than lossless FLAC with the FW2.1, if those track are less than perfectly mastered.
I can understand one will prefer FW2.1 if they mainly listened to high quality, well mastered tracks. But to me, even well mastered tracks sound flat with FW2.1
I have followed the DX90 thread in player.ru with the help of Google Translate. It seems the FW2.0.5 actually has the more sound effect libraries loaded. I suspect some of those may have to do with software based clip protection. By means of "Clip Protection", I don't refer to the hardware based clip protection, and sure do not want to start another technical discussion on clip protection. I am referring to similar effect I experienced in J River Media Center. Anyone who uses JRMC will know what I mean.
Functionally, Lurker's lightweight FW2.1 is running perfectly. It seems to fix the "Fade out - Fade in" bug of the stock iBasso firmware.
Now I just hope Lurker will release a FW2.0.5 equivalence of his great work.
Edited by borrego - 7/19/14 at 7:25pm