Mike Warren

I really enjoyed that. Looking forward to part 2.

I want one!

This may be related: https://www.casiomusicforums.com/index.php?/topic/18388-notes-out-of-tune-px-s1000/

If we're talking about "old" Roland pianos, my first Roland piano was a HP70. Next, I had a Yamaha FP80 and then a RD1000. Later, when I got a JV90, I used it's piano sounds from the RD1000.

It's no different than putting a DP in a grand piano shell IMO.

Sounds like you're in an out of the way place like me. I'm interested in what you think of the PX-S3000's action.

Was it a MK2? The difference between the 49/61MK2 and the 49/61 Essential is massive.

I went through a similar process recently: https://forums.musicplayer.com/ubbthreads.php/topics/3107957/controller-keyboard-suggestions-for-daw#Post3107957 I ended up getting the Arturia Keylab MK2 61. I'm happy with it. The Keylab MK2 series does have an on/off switch. Don't go for the Essential versions. They have a horrible action (and no power switch).

According to the service manual it has a 7805, 7812 and 7912 so that would be +5V, +12V and -12V. Getting the negative supply from a positive DC in will be non-trivial. Service Manual: https://www.synthxl.com/wp-content/uploads/2019/07/Roland-A-70-service-notes.pdf

I "found" it by making it myself.

For the volume to go to 0 the wiper has to be connected with almost no resistance to one end of the pot, so that pot would have to be 0 ohms for a large part of its travel, so it's a special one. (BTW, I'm an electronics engineer)

Have you hooked it up to a computer and checked it actually is sending CC11?

That would have been wonderful. I haven't even seen any live music since this pandemic started. The couple of concerts I did buy tickets for were both cancelled at the last minute.

The actual value of the pot is not the most important thing. Typically, the keyboard send out 5V on the top end of the pot. The bottom end is connected to ground and the wiper forms a voltage divider. For most keyboards, I'd expect anything between 20K and 100K to work, but the range is the killer.

The "B" signifies it's a linear taper, but many pedals need short throw pots. You'll be able to tell this by looking at how much of the 270 degree range is actually used.