ffmpeg \
 -i 9-10 + 160.wav \
 -i 3-4 + 160.wav \
 -i 5-6 + 160.wav \
 -i 7-8 + 160.wav \
 -filter_complex \
[0]atrim=end=124.45:start=60.0[s0];\
[s0]aformat=sample_fmts=fltp[s1];\
[s1]amix=normalize=False:weights=1[s2];\
[s2]afade=duration=1.0:type=in[s3];\
[1]atrim=end=186.0:start=123.45[s4];\
[s4]aformat=sample_fmts=fltp[s5];\
[2]atrim=end=186.0:start=123.45[s6];\
[s6]aformat=sample_fmts=fltp[s7];\
[3]atrim=end=186.0:start=123.45[s8];\
[s8]aformat=sample_fmts=fltp[s9];\
[s5][s7][s9]amix=normalize=False:weights=0.7 0.8 0.7[s10];\
[s3][s10]acrossfade=curve1=tri:curve2=tri:duration=1.0[s11];\
[1]atrim=end=1258.02:start=185.0[s12];\
[s12]aformat=sample_fmts=fltp[s13];\
[s13]amix=normalize=False:weights=1[s14];\
[s14]afade=duration=1.0:type=out[s15];\
[s11][s15]acrossfade=curve1=tri:curve2=tri:duration=1.0[s16] \
 -map [s16] MIX + 150.wav
