This is a long-winded help request for calibrating my Yamaha 01v96 mixing desk for the purposes of mixing, live work and recording. I read a brief description on tweakheadz but it fell short of telling me exactly how to do it. I feel this is a very important point so I need and would be greatly thankful for good descriptive help / advice on doing it. If I describe what I have gleaned from the article so far along with the gaps I need to fill to realistically accomplish this. 1. Set all faders to 0db - this is fine and I presume it means all channels and master too. 2. Find a reference tone of 0db - this is fine as the 01v96 has the ability to generate the reference tone. 3. Adjust the trim till the level meters reach 0db - there is a lot of information missing here. I need to know the following: a) Where the reference signal goes and how - I am presuming a physical patch need to be made from an output of the desk and into all the individual channel input preamps. b) How to adjust the gain - I am presuming that the trim is the adjustment of the gain pot on the channel input until the level meter peaks at 0db. c) Output levels of instruments that go into the desk – Ok so we have got a reference signal of 0db into the desk and calibrated each channel to 0db. How does this actually work with all the different instruments that get plugged into the desk. For example – I have a guitar pod that pumps out I believe +4db and an organ sound module that gives out –10db and then there are vocals at different levels etc. How does all this reference back to out 0db setting – surely +4db will be too much and –10db to little and so the calibration is point less. Am I missing the point? Please help with the above problems, Ta, Alex.