Thank you for the helpful and humorous responses.
I didn't expect this level of scrutiny or assistance, and all of it is welcome.
I'll try and answer the myriad of questions as best as I can, but I think where I truly messed up is plugging into the passive input on the bass head.
------------
I do know what the function of a compressor is. It was recommended to me by the other bassist at the church, to control how quickly a note registers and how long it sustains after being played. I picked up a MXR M87 off of CL and was hoping that it would help to mask some of my inadequacies as I learn and improve. I had some issues powering it, as the daisy chain that I purchased to power it (and an EH Big Muff Pi that I borrowed for one of the songs that required distortion) was not supplying adequate power. It wouldn't stay on at home, regardless of which connections I tried. So I didn't have as much time to manipulate the settings as I would like. I left everything at noon, knowing that it probably wasn't doing anything, but thinking that it wouldn't hurt to eliminate the extremes. I appreciate the thoughts on that pedal, and I'll definitely dial it in or simply put it away for next time (in two weeks).
--------------
The strings are plain old rounds, and they have been on the bass since I bought it used two + years ago. For all I know, they are original to the bass. The bass was in pristine condition, so I didn't think I needed to replace them at the time, and haven't since. They have been fine in the past. I have always wondered if I should replace them, as I don't know their origin or age, but they stay in tune and are what I am used to.
---------------
The signal chain is bass-compressor-muff pi-bass head which is also connected to the PA, and plays through several monstrous speaker enclosures hanging from the ceiling. The room looks like a large theatre in the round and holds around 500 people. In the past, I skipped the pedals and went straight into the head, but I'm not sure if I plugged into active or passive input. I don't manipulate the settings on the head, and just leave the master at 9 AM. My bass has a switch that can toggle that as well. I usually keep it active, but felt like this time it really emphasized every single hand movement. FWIW, the other bassist was in the crowd and he noticed that it was loud as well.
-----------
There is a sound booth, and they have full control back there. The guy can change anything he wants to and can lock into any single frequency/instrument. We had two singers, two guitarists, drummer, keys, and me.
----------
I did not mess with the tone knob on my bass. I am uncomfortable at this point making adjustments on the fly or even during rehearsal, as I'm not totally familiar with what effect it will have to change the tone or rearrange which pickup is being used. So I set it at home while practicing to what I think sounds good, and then just leave everything as it is for the performance. Brutal honesty there, so be gentle. I'm sure a more experienced bassist would have no issue spinning tone knobs like a DJ. Maybe adjusting the tone on the fly would have solved it, but I didn't want to do something that would be distracting to people trying to worship.
-------------
I hit all of my notes correctly this time, so I was pumped about that. I just had a lot of issues muting strings and with noisy transitions. I've played several other times and made mistakes with playing the wrong note a few times, but didn't have the same brightness issues. This time was definitely different, and apart from the mistake with the input jack, the only other new variables that were added were the two pedals.
--------
LOL to the guy who told me to put my credit card back in my wallet and step away from MF (
Sweetwater!). I did order a Boss tuner pedal, because simply holding my strings was insufficient to mute them this weekend, and my scratchy volume knob is awful to turn down. I'll be muting myself with that during segments of songs where I'm not supposed to play, as opposed to just using my hands to mute the strings.
I hope that answers some of the questions that folks had as they diagnose my issue. I really appreciate everyone's thoughts. Again, I'm new to this, and trying to improve. It took a few years of practice to get to the point where I was adequate enough to play with this group. I appreciate the expertise and experience on here. Thanks all...
View attachment 2921577 Here's my bass. Thought that would help, if only to ensure that we aren't discussing carrots.