if you're not going to use the GPU why would it bottleneck the system?
bottle necking is what people use to refer to a low end CPU that can't process fast enough to keep up with the GPU.
if you're not going to use the GPU perhaps consider any variant other than the "F" The "F" does not have onboard graphics and if you slot it you can't use any video outputs on the motherboard you put the "F" CPU in.
You can use the HDMI on the motherboard instead of a GPU. if all you're doing is making music with a single monitor, you don't even need a GPU
see this link to compare all the different i7-9700 models:
https://ark.intel.com/content/www/us/en/ark/compare.html?productIds=191792,195306,193738,186604
of note, you can't buy the 'E' version, as it's enterprise sold to OEMs and not for commercial resell. but i put it in there for giggles.