Setup: RTL-SDR.com V3, SDR#, DSDplus & virtual audio cable

Lots of errors in DSD+ event log, ECC FAIL, CACH ERR ... even though DMR signal is quite strong and SDR# is tuned to center frequency, NFM 12.5 kHz, recording: filter audio off.
2018.12.29 22:17:46  +DMR           slot1         BS DATA       DCC=1  Idle
2018.12.29 22:17:46  +DMR                slot2    BS DATA  ERR3 DCC=1  MBC  ERR12  ECC FAIL
2018.12.29 22:17:46  +DMR  CACH ERR slot1         BS DATA       DCC=1  Idle  ERR17
2018.12.29 22:17:46  +DMR                slot2    BS DATA       DCC=1  Idle
2018.12.29 22:17:46  +DMR           slot1         BS DATA       DCC=1  Idle  ERR10
2018.12.29 22:17:46  Sync:+DMR
2018.12.29 22:17:46  CACH Sig ERR2
2018.12.29 22:17:46  +DMR           slot1         BS DATA       DCC=1  Idle
2018.12.29 22:17:46  +DMR                slot2    BS DATA       DCC=1  Idle
2018.12.29 22:17:46  Sync:+DMR
2018.12.29 22:17:46  +DMR  CACH ERR slot1         BS DATA       DCC=1  Idle  ERR4
2018.12.29 22:17:46  Null SLCO

I changed RX bw to 12.7 kHz and adjusted RF gain below 19 dB. I set SDR# volume level to about 36 dB and Windows VAC audio volume level to approx. 18%. Much less decoding errors.