Background on me...
I've found over the years the less I do in the computer, the better for me. I work on computers all day, I don't want to have my music reliant on them. A long time ago, I tried pure data and some other things... it just wasn't for me. Everyone is different.
Practicing and developing muscle memory, etc... I have to be super careful of this because I have weak wrists, weakness in my hands. Totally blew myself out when I was around 18 / 19 and I was practicing piano 6 hours a day. I had to stop completely for awhile - and I took up playing bass in bands after that. I learned that I couldn't practice to the amount that I wanted to and had to learn how to hold myself back and accept imperfection. That took a while. I did see a neurologist in my late 30's and yes - I do have weakness, probably born with it, and thankfully no diseases causing it.
So after many years - I learned to just play for the love of it and practice only enough to get to a level of playing something that I was hearing in my head - and to rotate what I play.
My first love is the piano... played trumpet... picked up bass for years... my wife bought me a guitar for my 40th. I prefer hardware - needs to be tactile.
Enough about that... as far as balancing my creative energy. Just like I rotate instruments - i have to rotate my pursuits. I just go in phases and I find if I fight it I stall out - if I roll with it it's ok. Right now I'm more interested in collecting and painting little tiny lead miniatures than recording music. But, I've bought some new guitar pedals and I'm loving jamming on guitar - which is definitely not an instrument I play well.
Sometimes I need to read, sometimes I'd rather take photographs. Sometimes I burn up all my creativity at work - I do programming and solving process problems and manage projects. I've been in IT since the early 1990's.
Assuming you're doing music for a hobby and not a living - because that changes everything. But assuming this is a passionate hobby and not paying your heating and food bills - follow your muse. If programming sound and creating instruments is what's feeding your soul right now... DO IT. Don't feel guilty about the songs you're not writing - you're still 100% creative and your new ideas might be the catalyst for you or for others if you release your programming work.
I ran a label for years - and I realized I was never doing my own music or pursuing my own creativity. I was using all I had on the label and promoting the artists. I really had to stop and figuring out how to stop was a horrible thing - because I hated letting people down. But it came to a head and I put it on hiatus a year ago and I'm a much happier person now. I should have taken this break earlier. I was forcing my creativity into something that wasn't fueling me any longer (and believe me - it really did for years!).
Long story short - do what makes you happy and try not to feel guilty over what you didn't do.