Tayor,
I still own my AW4416, although it is not my primary recording platform anymore. I did record on it for several years. What I use it for now mostly is a 24 channel digital live sound mixer. I am not in front of the desk right now, but a couple of principles to remember is to make sure what you are looking at. There are mixing layers for every function of the unit. Mixer input 1-16. Mixer input 17-24 plus stereo returns 1 and 2 which by default are the internal FX returns, and monitor of the recorded tracks. On the left side of the desk is the mixing layer section. Choose Home then monitor and it will take you to your recorded track mix. Then select the recorded channel you want to edit - the button above the fader. Then near the top of the left side choose the view button and it will take you to the edit page of the recorded track. Make sure that is selected to stereo left and right for a mono track, then you can pan the track as desired. By default the auxilliary channels 7 and 8 are the internal FX sends. You can send an input from any recorded (or input channel) by hitting the Aux 7 and / or Aux 8 button obove the mixing layer section to the fx bus. Make sure that the stereo FX return faders (hit mixing layer 17-24) the 2 last channel 15 and 16 is your stereo returns for that layer. Make sure they are on and assigned to the main mix and pulled up to unity gain. You can also edit your effects, choose from dozens of different effects. I can give much more help and you may know all of this and some of your other settings may be changed - for instance the return channels could have been changed to return another input. It gets pretty complicated pretty quickly. However i will tell you that I believe the Yamaha AW4416 was a massive breakthough achievement back in its day. It can record up to 16 channels simultaneously at 24/48 uncompressed digital audio. It has virtually no latency at all. It has 8 virtual mix tracks for every one of the 16 tracks. Besides the FX it has dynamics processors (very good compressors, expanders, companders etc., etc., etc.) assignable to every input, output and recorded track. And does it all flawlessly. The thing is still a great machine to this day. There are limitations such as only 8 physical inputs. You have to purchase option card to increase your I/O, but it still one of the best all in one MTR's to this day and that is saying a lot considering it was introduced in 2001 I believe.