You need polyphonic portamento with a time of zero to be able to achieve this effect. Are you telling me you KNOW for sure that all the soft synths, and VSTi sample sets actually CAN do this?
Or are you assuming?
Are you also assuming that LiveStyler or whatever soft arranger you are using actually SENDS the right codes, too? Or once again just assuming..?
I'd be interested to hear if these really ARE implemented. Got a web page you can direct me to to see the specs?
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An arranger is just a tool. What matters is what you build with it..!