Setting up USB Audio for the KPA on Windows

    Just a query on the USB driver for the KPA. I installed beta OS 9.00 to a toaster model from a Win 11 machine - using Rig Manager to download and install the new Rig Manager and OS 9 beta.


    Looking to select the Kemper audio driver from Reaper, I saw no specific ASIO option for the Kemper but only Generic Low Latency ASIO driver - which I tried and it worked immediately with some crackles. I recorded a short test piece into Reaper and playback was audible through the return ASIO driver to the KPA with headphones connected. After updating Reaper to the latest version and restarting the KPA and Rig Manager I tried to set the same arrangement up and the only audio output option for the generic low latency ASIO was now the laptop speakers (Realtek) and no option to use the generic low latency ASIO to run audio to the KPA via USB.


    Is a specific Kemper ASIO driver installed with Rig Manager? How is it named in the Windows ASIO list? If this hasn't occurred automatically (I have restarted the PC also) where do I go to get it installed?

    In the meantime, is there an ASIO driver with KPA name on it? Reamping would not be possible if the generic driver is the only one available and it is currently one way only (into the computer from the KPA) on my machine after initially being bidirectional. Surely this is not the state in the current release, is it?

    It works great now asio4all did it. It was a bit of a learning curve but all is well now. I might change back to S/pdif because sometimes I don't adjust too well to change.

    Quote from Tony G

    It works great now asio4all did it. It was a bit of a learning curve but all is well now. I might change back to S/pdif because sometimes I don't adjust too well to change.

    If you need to work with many different inputs (mics, other audio devices) in a studio or home studio context, then you might be better with SPDIF and your multi-channel audio interface. Neverthless, if the KPA can function as a clean audio input for guitars and an easy way to record the profiler output - very handy with just a laptop for example - then this will be very useful. If the MIDI inputs could also be used for recording (using the KPA as a thru box for a keyboard for example) then you would have a very flexible setup with just the Stage and a laptop.

    Maybe this is helpful for someone: I had issues to get the USB recording to work with reaper on windows. ASIO4ALL did not let me record 4 inputs at once, with direct sound I was not able to hear anything although things got recorded, with wave out I had horrible delays and clipping. What worked for me was:

    Audio system; WASAPI

    Mode: Exclusive mode

    Input & output device: Profiler

    Input channels: 4

    Output channels: 4

    Blocksize: 256

    Preferred depth: 16 bit

    Sample rate: 44100

    • New

    I tried both ASIO4ALL & WASAPI and there"s no signal passing thru. I'm using the free version of Cakewalk by Bandlab (which is no longer supported). I'll probably try Studio One or some other DAW when I get a chance.

    ~ Marc.