But none of those definitions include the term 'button pusher'.
Let's face it, if you can press 'play' and mime over an audio track, then everyone in the world is a 'musician'.
You know, this strikes me as an awful lot of tap-dancing to justify something so broadly that there is no shame in any form of fakery. I'm sorry, but maybe YOU need to justify this, I don't. On the other hand, I am not involved in selling, demonstrating or promoting arrangers. So my motives are unsullied by commercial concerns.
If anyone here thinks that miming to audio tracks makes you a musician, you are so deluded as to not be worth talking to. And if you DON'T, why so silent when someone says such absurdities?
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An arranger is just a tool. What matters is what you build with it..!