Jacob - all sounds (especially the bell) can be adjusted individually. Go to the locomotive settings, and scroll through the pages until you get to the function buttons. Then scroll through the function buttons (the box on the upper left) until you reach the bell. When you are on the bell function you can select the volume and turn it up and down using the wheel. I've found that on some locomotives (depending on speaker installation) I will need to lower the overall locomotive volume in addition to the bell until it is quiet enough....then I will up the volume of other individual sounds to where I want them.
My own list of desired features:
1. dynamic brake across consists. Similar to notching up/down across consists.....press the dynamic brake on the lead and it activates the dynamic brake sound on all locomotives in the consist. Very easy to add.
2. Brake squeal. Activated when locomotive comes to a stop quickly.
3. Smooth on/off of headlights. As they are now it is more of an "instant" on. The prototype doesn't come instantly on, rather they have a slight but noticeable transition from off to fully on.
4. More and varied air let-offs/air compressor. Right now there are about 2-3 per prime mover....would be nicer to have 5-6 per prime mover and have the timing be much more random. Some would occur right next to each other, sometimes there would a longer space of time. Right now they seem to be too timed.
-Kevin