There is also option #4, which is to purchase a Freestyle musical piece already made, from the site that AZTD mentioned for example (marvins music). Or from http://www.musikur.com
If you have some knowledge of your horse’s tempo, you can pick one that suits your horse by listening to all the options on those sites and having the file sent to you.
If you have a video of one of your tests from a show, you can play it on your computer while simultaneously playing music.
It’s phenomenally less expensive to order from a ready made vendor, compared with having music designed for you and edited by a pro. And as for splicing your own music-- if you have any challenges with using the editing technology, there can be blips and bleeps and abrupt shifts from one gait to another as the music shifts. I’ve heard that type in performance, and it’s not terrible. But it’s not fluid, either.
I ordered one from Marvins for First Level and I’m very happy with what they sent. All of the shifts from Trot to Walk to Canter are extremely fluid and professional. The downside was that I really didn’t get to hear much of what it sounds like, prior to ordering. They only provide small sample clips on their site.
But when it came I was truly impressed. It’s very nicely done and very polished.
I was not happy with their choreography so I completely rewrote it. But I’ve played drums, can sight read music, and was a theater major. So it suited me to do my own choreography. Of course you are bound by the length of time allotted to each gait and also to the order. It’s set, and you must choreograph to match what’s playing.
In any case, Pre-made music is an option used by many in my area. And it makes a lot of sense to save that money, especially at lower levels, or when you’re new to riding to music.