Hi Dietz,
If you play on your double bass or from your organ pedal board a note under 120 Hz you will not hear it as the 5 or the 7 speakers do no go under 120 HZ
The home teather system does no have big 38 cm speakers to produce the bass
If you read http://www.dolby.com/uploadedFiles/zz-_Shared_Assets/English_PDFs/Professional/38_LFE.pdf
That is the reference for Dolby
The LFE channel is the 6th or the 8th channel
read also http://en.wikipedia.org/wiki/Low-frequency_effects
Why you have 5.1 or 7.1 effects in Logic and in MIR you have only 5.0 and in 7.0
Why do you have 5.1 and LFE control in VEP 5 and not in MIR
If MIR cannot deal with 5.1 or 7.1 I have no use of it I want a refund
Best
Cyril