I have been recording from Keyboard output thru a converter and feeding to the laptop thru USB port. My settings were Host - MME and Recording device - MS Sound Mapper. Today it has stopped working. I tried all combinations of hosts and recording devices with no luck.
Is that digital audio or MIDI? If it’s audio you should select the USB device as your recording device.
Audacity can’t directly record MIDI, but if you have software to play MIDI, you can record whatever is coming OUT of your soundcard.
Which host should I use? MME, Windows DirectSound or Windows WASAPI?
I have Audacity 3.7.7 but I do not see USB as a recording device option.
It might be MIDI. Check the user manual for your keyboard.
If the keyboard has a USB audio output check your Windows Permissions/Privacy Settings to make sure Audacity is allowed to use it.
If it’s MIDI-only you’ll have to set-up MIDI software (not Audacity) so you can hear the sound through your computer. Once you can hear the keyboard through your computer, follow the instructions in the link above to record what you’re hearing.
Your MID software (a DAW application, etc.) may also be able to “capture” the MIDI data and optionally render it as an audio file.
Or, if you have a desktop computer with a regular soundcard and line-in, or an audio interface with line-in, you can record/digitize the analog output from the keyboard. (The mic input may “work” but it’s not “correct” for a line-level or headphone-level signal.
Which host should I use? MME, Windows DirectSound or Windows WASAPI?
If you have a MIDI connection, NONE of those will work and it won’t show-up as a recording device. If you have a USB audio connection, ALL of them should work.