Be aware that in some synths, you can go in to the control panel of the individual synth and change the pitch up and down one cent at a time.

Each synth has it's own unique way of doing this. Not all synths are tunable but most are. You may have to dig around to find the way to get to the tuning fields..... but dig in and look.

The synths have the ability to tune to allow you to play in tune to audio tracks that are not A-440. The very situation you are describing.

You can find my music at:
www.herbhartley.com
Add nothing that adds nothing to the music.
You can make excuses or you can make progress but not both.

The magic you are looking for is in the work you are avoiding.