Use the left column for SonicAc3.ini and right column for Sonic in normal mode. The files generated are bitidentical (for me).
Code:
[Parameters] [Soft Encode Settings]
DataRate=448 Data Rate = 448
SampleRate=0 Sample Rate = 48 KHz
CodeMode=7 Audio Coding Mode = 3/2 (L,C,R,l,r)
UseLFE=Off LFE enable = Checked
Bit stream mode = ...Complete Main
DlgNorm=20 Dialog Normalization = -20 dB
NonIntel=Off Save fr. in Intel byte order = Unchecked
CMix=0 Center Mix level = -3 dB
SurMix=0 Surround Mix level = -3 dB
DolbySurround=0 Dolby Surround mode = Not indicated
Copyright bit = Checked
Original bit stream = Checked
Info exists = Checked
Mix levels = 105 dB SPL
Room type = Small room, flat monitor
Deemphasis=On Digital deemphasis = Unchecked
DCFilter=Off DC high-pass Filter = Checked
BandWidthFilter=Off BandWidth low-pass Filter = Checked
LFEFilter=Off LFE low-pass Filter = Checked
Phase90=Off 90 Deegre Phase shift = Checked
Cut3dB=On 3 dB attenuation = Unchecked
CompressionType=0 Compression characteristic = None
RFCmpInUse=On RF overmodulation protection = Unchecked
TimeStamp=On Add Time Stamp = Unchecked
Sonic uses the defaults for not supplied parameters, then you need always:
Bit stream mode = ...Complete Main
Copyright bit = Checked
Original bit stream = Checked
Info exists = Checked
Mix levels = 105 dB SPL
Room type = Small room, flat monitor