Need code for kirsch k3 - One For All URC-3021 Remote Control

Generally none, but there are some far-out answers here.

https://www.techhive.com/article/599621/how-to-use-your-mobile-device-to-control-your-home-theater.html

https://www.google.com/search?q=kirsch+k3+system+app

..

Does it do this from both the remote and front panel button?

If you wish to get more details; check the sites linked here. It has set-up code list & set-up procedure to many popular brand remote controls.Common codes to check devices with different brand TVs are given, in the order of the device's brand name list in alphabetical order.Pull up older posts. Surf the site with patience.
http://remotesearch.blogspot.com/
http://electrohelponline.blogspot.com/

028,022. Try these codes. If you wish to get more details; check the sites linked here. It has set-up code list & set-up procedure to many popular brand remote controls. Common codes used for devices too are given, in the order of device brand name list in alphabetical order. Do a search by type in the brand name of your device, at its search box, and press "Enter". Or, pull up older posts.
http://remotesearch.blogspot.com/
http://electrohelponline.blogspot.com/

tengo un bluray marca lg y quisiera utilizarlo para controlar dicho dvd y quisisera que me proporcionaran un codigo

Yes lost it wen moving

ya u can connect the dvd player to the loud speaker it is simple there is one connectivity port in the dvd player u can connect through that

'ai besoin une remote pour un receiver fm et am kirsch loud speackes k3 pouvez vous m'aider svp

If your unit is not listed within the list of acsess codes, you will have to find it the old fashioned way. Code search is available on all multi function remotes. It takes awhile but it will eventually work. You might also try going to the manufacturers site and check in the "support" option or the FAQ's Thanks, Dana

If there are no codes in the manual then you may have two options left for you. You may order a 20 or 21 remote from Dish after verifying it will work with your system with customer service or you may get an ALL IN ONE REMOTE. Thanks for using Fix Ya and let me know if you need further assistance.