encodec lossy audio LFE how to do not to process

[jhsxy2005]

ffmpeg -i "F:\8.flac" -af "pan=7.1|c0=c0|c1=c1|c2=c2|c3=c3|c4=c4|c5=c5|c6=c6|c7=c7" "F:\8.wav"

ffmpeg -i "F:\8.flac" -af "pan=7.1|c0=c0|c1=c1|c2=c2|c3=c3|c4=c4|c5=c5|c6=c6|c7=c7" -c aac "F:\8.m4a"

ffmpeg -i "F:\8.flac" -af "pan=7.1|c0=c0|c1=c1|c2=c2|c3=c3|c4=c4|c5=c5|c6=c6|c7=c7" -c dca -strict -2 "F:\8.dts"

flac & wav,LFE is no process,but aac & dca is do EQ and down volume.
aac & dca,the eq is no same,dca is lower.

??? which set can do not to process LFE ???

[jhsxy2005]

​http://weibo.com/1176020520/F09fyaz77

there is audacity Plot Spectrum

[Carl Eugen Hoyos]

Please provide the (aac) command line you tested together with the complete, uncut console output to make this a valid ticket and please explain your use-case.

[Rostislav Pehlivanov]

Cannot be fixed, pretty much all lossy codecs modify the LFE to make it easier to compress so this bug is unfixable.