With recent vintage locos in the past couple of years, it tends to mean that the loco comes with a 21 pin dcc ready lightboard so that you can simply plug in the decoder of choice. It also may have a portion of the weight that can be removed for a speaker, or a space carved into the weight to install a speaker.
DCC Ready means just that: you can plug in a DCC decoder without any fancy electrical work. A DCC decoder is just DCC. For sound, you need a sound decoder. There are some sound only decoders out there, but most sound decoders also have the motor control logic built in.
Not all decoders are sound decoders. If it is a sound decoder, the manufacturer will indicate that it is a sound decoder. Otherwise, it is nothing more than a mobile decoder, although most decoders, sound or non-sound sound, will support light functions.
It sounds like you don't have a lot of experience with DCC or sound. It might be better to purchase a loco with sound installed as a first purchase. That way you'll have a nice neat install to follow. I've done about a dozen now, plus several dozen more DCC-only installs and I'm still trying to be that neat.
Beyond that, with today's tiny high-perfromance speakers, It's possible install sound in just about anything. Some locos obviously have more room than others. That will give you a much wider selection of candidates to choose from.
As maxman suggests, you might want to ask about the DCC/sound readyness of specific locomotives right here on the forum. Somebody has likely already installed sound in your chosen locomotive(s) and can offer hints as to how they did it.
maxman The one exception to this is if you find a loco that is sold both with and without sound, and uses the same internal mechanical configuration. An example of this would be some of the Atlas locos in the Silver and Gold variations. The Gold locos come with the sound installation; the Silver locos come with the same a-frame speaker mounting but with a weight installed where the speaker would go.
The Atlas Silver Line HH600/660 models are very difficult to get a speaker and decoder in. Even with removing the light board, there is not much room left under the hood, If the wiring is not routed perfectly you will not get the shell back on easily. With small diesel switchers you have to get creative with the wiring/speaker/decoder placement. Search this forum for articles on sugar cube or Iphone 5 speakers. You can also look at my post history for a thread on putting DCC and sound into a Walthers Mainline SW-1. I decided to go with DCC no sound on this loco, mostly because it was easier, and cheaper to go with a drop in 8-pin decoder.
Word of warning, even though it says dcc ready, there may be more to it than just putting in a decoder. You may have to change lights out for LEDs as the incandescent light bulbs will over heat and melt the shell of some locomotives. You also want to verify that the motor is indeed isolated from the track when you go to hook up the decoder. If it isn't you will short circuit the decoder and fry it.
If the OP was asking about built-in speaker enclosures, there are some engines (like the Kato HO AC4400, SD-38 and F40) that do have speaker enclosures built in. In some cases as noted, there are some where a sound equipped version of the engine would have a speaker, and a non-sound one would have a weight that could be removed. I suspect as time goes on more and more engines will come with a speaker enclosure of some type.
p.s. if an engine has a light board, using a light board replacement sound decoder means the decoder takes up no additional room than the light board did, so you just need to find a spot for the speaker.
Athearn tells you on their website if the locomotives are DCC ready and sound ready. At the bottom of most of the pages, there is a gray table. In it it says DCC and tells you (no, ready, or yes) under that it says sound and (no, ready, or yes). The table also list the minimum radius and recommended radius.
The older locomotives aren't DCC ready. The newer Gensis line is either DCC and sound ready, or equipped The newer RTR line is DCC ready. However, they just released the new RTR SD40s which will be either DCC and sound ready or equipped.
Take a look at the prices. You will find that a sound-equipped DCC engine costs about $90-$100 more than the same engine without DCC or sound. Then, take a look at the prices of a quality DCC sound decoder like a Tsunami, plus the cost of a speaker and enclosure. That's going to come to more than $100, and all you'll have is a DC engine and a bunch of parts. Installation is either more work or more cost.
I would also add that most OEM installs don't use premium speakers nor have the best enclosure set up. Also, I like a 2 speaker install(not always possible) and almost all OEM installs are single speaker. An example would be the Genesis MP15 switcher a few years ago--I had one from Atlas as well. Neither was done well. The sound isn't even comparable to what it was, it's like the difference between a toy and a model.
I've always wondered why Anet doesn't give us the option to enable a sound alert for when a squad ready check is made, similar to the sound notification when a PVP queue pops even though you're tabbed out the window.
It'd be such a huge QOL boost, because there's times where I find myself checking out other things while the squad leader is putting together the group and finding other players. A few times I was caught off guard that there's ready check going on and I didn't know about it.
For example, the sounds worked for things like Penetrating Shot, but there was no sound for Rapid Fire. I even tried "Emphasizing" Rapid Fire, while it made the text much more noticeable it did not add a sound.
P.P.S. Some sounds were working, Penetrating Shot for example, Bombs on Furnace (didn't get melt so not sure about that). I deleted my cache after maidens. I also went through and clicked the horn for each of the sounds and I could hear them all during testing.
I thought it'd be beneficial to show you guys a mix done with the profiles so you could get a sense of how they sound in a mix. I used the Kally OD1 HV30 02 profile boosted with an Eternity Boost Clone.
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It's an awesome pack for sure! Tim cautioned about the mids, as they could be somewhat harsh, but I have found them just perfect in a mix, especially with lower turnings. I've barely scratched the surface, but I love it so far.
My contribution clip from the pack so far:
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What do you want to know?
Adding sound is pretty straight forward.
Do you use storyboard?\
For buttons, just add the audio.play to the same function that executes your button. Or add the same event listener to a different function that starts the audio.
In addition to the aforementioned HDMI connection found on every TCL Sound Bar with Roku TV Ready, you will also find an optical connection, analog connection and even Bluetooth. This means that even if you have a different type of setup or TV, TCL thought of it, and you can enjoy the great sound that comes from our nearly two decades of audio design and manufacturing expertise.
Equity concerns about different service levels on the 1 Line are sure to be raised about the new plan, especially with the Rainier Valley taking the heavier hit on service reductions to accommodate the work. This is layered onto the inequity of the Rainier Valley having most of the at-grade light rail in the system, which means collisions with cars turning and people crossing already occur fairly regularly and bring service interruptions and unfortunately traffic deaths. Most new sections of light rail have been and will continue to be grade-separated, as Sound Transit learned the mistakes of its initial line.
Such adverse impacts imply a need for government support to PPP programs, similar to privately led economic sectors. This support was deemed necessary even if it resulted in increased assumption of financial commitments by governments in many countries. A sound procedural framework, however, can help anticipate support schemes to manage PPPs through crises. Such a framework provides a clear mechanism to ensure that such support is provided in an organized, transparent, affordable, and justified manner.
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