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Is this what you are looking for? http://line6.com/media/dt50/DT_MIDIGuide_v2_0_RevA_English.pdf

Thank you psarkissian, This was a process that certainly took time for you to perform, which you did not have to do. It means a lot to me that you did it, and also took the time to explain your logic.

I would love to know how things go with that. Thanks for giving it a go.

Disappointing and frustrating. :( You have never seen that problem with 1.71, and the response from the ticket I submitted was "...there is not much I can help you with here...even though people on forum may have been successful with that in certain cases." In certain cases? The truth is closer to my JTV is the only case. After reading the changes, I realized the difference between 1.70 to 1.71 doesn't matter for me. I tried 1.70 again and no alt tuning. Back to 2.21 and alt tuning knob works. Even though I downloaded the 1.71 file from the Line6 site, it is the only copy I have. I would like to try a known good copy, but no one seems to want to send me one.

Tell the download interface you are Vista. I am running Workbench on Windows 10.

This has me scratching my head. Anyone have a copy of the TylerVariax_1.71.vxf file they used successfully and could post or PM me so I could try this again? Thanks

Hey Bigband, No, not custom alt tuning. The built in alt tuning does not change anything when I change the knob to any of the alternate tuning. It did not allow me to program alternate tuning with the stand alone guitar procedure. I've done it many times in the past. 1.70 and 2.21 everything works. 1.71 no alt tuning, but the models are clearly different sounding. That's the only 3 FW versions I tried. I have a L6Checksum.exe file that was saved on 8/27/15 on a backup drive and the 1.71 vxf file passed. The 1.71 file was downloaded from the Line6 site yesterday. I did no have one from 2015. For some reason, I only saved 2.21, 2.10, 2.00, 1.90 and 1.82 vxf files, all saved on 7/24/15. I'm using the OEM VDI and cable. I've tried both the online and local file option on a MAC and a PC. It would be nice if I could run 1.71 with all the features AND be able to load Workbench 1.62 on my MAC that meets the requirements of that application. It requires OS 10.5 and I am running OS 10.11.x I suppose I could create a service ticket, but I think the vxf firmware and WB app are no longer supported. Still, it would be nice if a Line6 staff person could help me out if they happen to read this.

I just rolled back to 1.71. The models really do sound better at first listen. Went to install Workbench and it says "Requires OS 10.5." I have 10.11 something. It can't be that simple, can it, seeing a 1 after the decimal point and thinking it is too old? Anyway, none of the alt tunings work now. I could not manually set them either. Didn't they used to work before FW 2.x on the JTVs? (Edit - Do I have to install even older FW and work my way up to 1.71?) I pulled out an old Windows 10 laptop. Installed Workbench 1.75 on that after I lied and told it I was Windows Vista, because it said there was no Workbench for Windows 10. I forgot how cumbersome Workbench was. Anyway, I loaded the latest Monkey for Windows 10 (1.62 I think, it's reinstalling 1.71 into my JTV-89F upstairs right now) and I'll see if I get the tunings back. Anyone roll back to 1.71 and solve these problems? Thanks Update: Installed 1.70 and got my alt tunings back. Now we try 1.71 again. Update: Dang... 1.71 lost alt tunings again. Time to download the 1.71 fw and try local update. Update: No alt tuning again with local file. Reaching out to psarkissian. Any reason you can think of as to why JTV FW 1.70 and 2.21 allow alt tuning to work while 1.71 does not? Thanks!

I use two 18650s in my SMOK ALIEN.

Didn't know they made 24.75" conversion scale length necks. Cool.

I thought running the mags and models at the same time was verboten. Did Line 6 change their position on this?

I think his idea was that completely detaching the mags from the electronics, the mags would always be engaged, using a separate vol pot to determine everything from no mags to full mags.

No doubt it is absolutely possible that you can wire it up if you're not afraid of experimenting. Disconnect the mags from everything and solder in new vol/tone/selector switches and connect it in parallel would be my guess. The rest of this post takes a different look at it, so it may not be worth your time if you are committed to your original approach. I started thinking about this question and after 2 minutes it started to make my brain hurt. It would require dealing with several issues, some of which I'm sure I don't know about. If you keep the signals separate, you should be good to go. The ability to blend is the result of the VDI cable. The signals are kept separate until they hit something like the 500X. The thing is, I think they are digital in that Variax Digital Interface. Feeding both analog signals through the same jack is the problem. My Majesty can do it, but it has a crap load of electronics in it designed to do just that. Maybe that could give you some clues that would help for you original approach. I think they already use a stereo jack for the whole power engagement setup. If you figure another way of turning on the power for the electronics, you could run a stereo cable into your multi-input floor modeler and do your blending within your preset. The mag input probably goes into the model selector switch first to turn off the mags when model mode in engaged. If that's the case, I would disconnect there, use separate vol/tone/selector switch into the tip or ring side of the stereo jack and use the other for the models. You most likely want to separate the acoustics into an FRFR cabinet anyway if you are feeding the mags into a tube amp. This would still let you blend any of the other models with the mags to go wherever you want them to go via your preset. I would like to know what you end up doing, and how it turned out.

Using a pick over the bridge pickup yielded the most pronounced banjo-esque overtone that disappears picking at other locations of the string.

I think my 89F has several good characteristics, which others have mentioned above. Knock on wood - I have not had the plink problem on my 89F, but (to me) many of the models have a banjo-esque overtone to them. I have tried other folks models, but everyone uses different gear, playing styles, hands, etc., so...