The master volume control CV is CV58, its values range from 0 to 15. The factory default value for this is 09.Digitrax SFX decoders have a factory default value of 09 set for CV58. This works well for 32 ohm speakers.The decoder will reset to this value whenever you do a decoder reset of CV8=8. Digitrax SFX decoders built for use with 8 ohm speakers should have this value changed to 4 or 5 for best operation value of 4 or 5, since the decoder may not supply enough current at high volume/drive levels.Your results may also depend upon track voltage present. Kato USA says ...
To get the most out of your SoundFX decoders you'll need an internet connection in order to get to the Sound Depot website (digitrax.com/sounddepot). For the casual user, access to the Sound Depot site will let you download new Project files that other users have customized. So if you want to change your loco's factory default GP38-2 sound project, and another user has previously uploaded a GP38-2 sound project file with something special, perhaps a different horn configuration, you can do it. It's easy: Just go to the Sound Depot and download the desired new sound project file or use ...
With Digitrax Sound Definition Language, you can use .wav files to create custom sound project files. The process of converting 'raw' sounds recorded in the field into a sound project file takes time and patience to produce a finished sound project file that sounds realistic. Tips for Recording Locomotives and other Sounds Recording the sounds is a major part of creating great sound projects. You need good recordings to work with. Record several complete sound events (several complete whistle blows from start to finish, etc.). This will give you several recordings to choose from when editing to produce your sound ...
Fred Miller has been an invaluable resource for information about Digitrax sound. Here are some of his thoughts about the sound project files, from the Yahoo Digitrax Sound discussion group: There seems to be confusion over what is a SPJ. Yahoo closed down all Groups in 2019. The information is still relevant. Fred Miller has also written a program called SPJHelper which easily lets you create/modifiy Sound Projects. There are additional Sound Projects on Groups.io - Look for AnPRR owned by John McMasters. He creates many SPJ Sound Projects. It is not surprising since it is a very ...