Doktor Avalanche
Why would you want to do that?
Just record to seperate tracks (mono or stereo), and then bounce them down to stereo track or whatever. A bus may come in handy to group the outputs together.
Actually It's not about recording, it's about monitoring five different instruments through only one track of echo, instead of five different open echos to monitor five different instruments. The more tracks with open echos to monitor, the more the noise base will increase. So the option is to have only one open track echo to control the monitoring of all assigned five instruments when practicing. It's more about control of one volume for five different instruments when just monitoring.
When I'm ready to record I'll switch them back to individual tracks.
When I just want to monitor the user can have all 5 instruments assigned to one Track for easy one track volume control.