volume control transporter before or after custom-convert.conf?

Hello guys,

I am using an upsampling sox rule in my custom-convert.conf , in this rule I am attenuating 3 dB to avoid clipping during upsampling.

Now I am wondering, which happens first: volume control on transporter and then processing in custom-convert.conf or does volume control occur after processing in custom-convert.conf? Is it done in hardware (in transporter) or in software (LMS) ?

Best regards,

Ronald