HI....Rainer.

Based on the details provided its difficult to advise.
Probably best idea is to post a picture of your desired signal flow.

If were me i would keep the focusrite as my main sound device in windows and biab preferences for recording and playback , and when useing the helix , thus, ...
Plug guitar into helix obviously , and then take line output of helix into line input Of focusrite.
Thus saving switching devices in the music software…which would drive me nuts.

If the real issue is not enough inputs on the focusrite cos you have other devices plugged in taking up inputs eg synths etc…then it would seem you need to replace the focusrite with a usb interface with more inputs OR a usb mixer with lots of inputs ..
Eg allen n heath zed series or mackie.
If the REAL ISSUE is not enough focusrite inputs and too many other devices like synths , then another option is to get a cheap line mixer with multiple inputs feeding one line input of the focusrite.
Either way youll only be able to record one source at a time ie microphone OR helix OR external hardware synth….if only one mic/line input On the focusrite.

Which brings me to ask , what is your model no of your focusite ???
Be aware IF you want to replace the focusrite with a usb interface with more inputs eg Usb mixer then i would rent any new device to ensure good drivers etc etc.

The other issue is ..do you want to record say 8 inputs at a time eg lets say you have a band , then not only will you need a usb mixer or interface with lots of inputs…but multitrack software whereby you can record multiple inputs at a time…
Eg realband that comes free with biab or reaper as examples.

Posting back your future plans and needs in DETAIL will enable the rest of us users to advise you correctly…ie forgetting the gear WHAT ARE YOUR SHORT AND LONG TERM NEEDS ? record one instrument at a time ? record multiple at a time ?
Etc etc.

hth/best
om

Last edited by justanoldmuso; 04/01/22 02:33 AM.
my songs....mixed for good earbuds...(fyi..my vocs on all songs..)
https://soundcloud.com/alfsongs
(90 songs created useing bb/rb)
(lots of tips of mine in pg tips forum.)