Diesel axle designation & DCC sounds.

[ICEman]

New to model railroading & the forum. 2 questions: I am planning an 10 x 6. "L" layout with 18" & 22" radius curves. It was recommended that I use 4 axle (diesel) locomotives. #! I assume that means 2 trucks, 2 axles each, 4 axles total; am I correct on this.
#2: planning on DCC with sound on the locomotive. Do all DCC decoders with sound have ALL LOCO sounds, bells, Diesel engine sounds, & air brake sounds ?

[rich1998]

The on board sound,decoders will have less sounds than the locos you install your own son decoders. Been there, done that. Read the details, CV's. It will take time.

Rich

[Trainman203]

Sound value is a DCC/sound decoder on a starvation diet.  It'll do, but other decoders, including others factory installed by Bachmann, have a lot more sounds and features.