org
org
Task rejected, since ADPCM was reversed from another place.
Changed to low priority
But the lower 2 mux looks like malformed to me. There is one more wire missing. Either that or I missed it. 

 
 EDIT: /ACLK4
 I don't see the problem, I've checked the topology and the transes 50 times. EDIT: Actually... hehe 
APU > DPCM > frequency counter LFSR > order of Bits Considering the [wikipedia page](https://en.wikipedia.org/wiki/Linear-feedback_shift_register#Example_polynomials_for_maximal_LFSRs) about LFSRs, for the [DPCM frequency counter LFSR](https://github.com/emu-russia/breaks/blob/master/BreakingNESWiki/imgstore/apu/dpcm_freq_counter_lfsr_tran.jpg) the naming order of Bits is swapped....
APU has a frequency LFSR in the DPCM section, and a frequency LFSR in the Noise section. Control signals for both LFSRs are labeled FLOAD,FSTEP in your schematics. That might...
See also here: https://www.nesdev.org/wiki/RP2A03_Programmable_Interval_Timer (Research by nesdev guys)