gpt的
"-af",
"arnndn=m=./arnndn-models/cb.rnnn:mix=0.88,"    # 人声增强
"afftdn=nf=-24:tn=1,"                                         # FFT 降噪，抹平音乐中频
"highpass=f=110,lowpass=f=4800,"                               # 切掉低音鼓/高频镲
"equalizer=f=250:width_type=o:width=2:g=-9,"                   # 衰减低中频，音乐基础弱化
"equalizer=f=800:width_type=o:width=1.5:g=-6,"                 # 再衰减中频，人声外区域
"atempo=1.03,"                                                 # 轻微加速 3%，节奏轻微错位
"asetrate=48000*1.02,aresample=48000,"                         # 音高上移 ~1/2 半音
"afreqshift=shift=20,"                                         # 整体频率偏移 20Hz，破坏指纹
"acompressor=threshold=-28dB:ratio=5:attack=8:release=80:makeup=5," # 压缩动态，音乐更“扁”
"volume=1.15,"                                                 # 补偿整体音量
"aresample=async=1:first_pts=0"                                # 保证音视频同步



grok的
"-af", "arnndn=m=./arnndn-models/cb.rnnn:mix=0.88,"
"afftdn=nf=-24:tn=1,"  # 强FFT降噪，进一步抹平音乐中频
"highpass=f=110,lowpass=f=4800,"  # 切掉低音鼓/高频镲，音乐能量大减
"equalizer=f=250:width_type=o:width=2:g=-9,"  # 衰减低中频（很多音乐基础）
"equalizer=f=800:width_type=o:width=1.5:g=-6,"  # 再衰减中频人声外区域
"atempo=1.06,"  # 轻微加速6%，节奏错位
"asetrate=48000*1.04,aresample=48000,"  # 音高上移约3/4半音
"aphaser=type=t:decay=0.5:speed=0.4:delay=2,"  # 相位扫，谱图模糊
"flanger=delay=4:depth=3:regen=35:width=60:speed=0.35,"  # 轻法兰杰，增加金属/扫频感
"afreqshift=shift=45,"  # 整体频率偏移45Hz，进一步乱指纹
"acompressor=threshold=-28dB:ratio=5:attack=8:release=80:makeup=5,"  # 压缩动态，让音乐更“扁”
"volume=1.15,"  # 补偿整体音量损失
"aresample=async=1:first_pts=0"