tring to find out how i can control my 100h code amp using the gateway app but cant find out how
Yes you can control your CODE100H from your laptop (via USB):
https://marshallcode.tools/pc-editor/
Not an official Marshall Amplification product so no support from Marshall themselves (but it works perfectly and it's all I use).
With reference to the Gateway App: I take it then you've not read any of the other threads on these forums nor browsed the site nor do you have the manual for your amp.???
https://my.marshall.com/support/tutorials
Have fun.
Regards,
Dale.
Hi William,
Thank you for your message, there is not a desktop version that Marshall offer, only a App you can download to a device.
Marshall Support