Siehe:
http://www.loopinc.at/umbau.htm
"Eine Stärke der 303 ist auch der Slide, der leicht anders als ein normaler Portamento funktioniert. Bei meiner Modifikation ist die Slidetime um ein vielfaches stufenlos verlängerbar. "

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Note added at 2003-04-02 12:26:59 (GMT)
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Daher auch das auf meiner oben angegebenen Quelle \"Slide ist VERGLEICHBAR mit Portamento\" - aber eben doch nicht ganz dasselbe:)

This is the German name for this ornament, as I learned it as a child from the table of ornaments that J.S. Bach wrote out for his children.

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Note added at 2003-04-02 13:05:07 (GMT)
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I don´t think this is referring to portamento. If it did, it would probably say \"portamento\", since the term \"slide\" is relatively rarely used by English musicians. Infact it refers to grace noites, making it highly probably it is the ornament consisting of two notes rising to the main note, the \"Schleifer\".

In fact, we even used to call this a Schleifer when I was learning organ in school, even though most of us knew no German and we used very few German expressions, because the term \"slide\" somehow seems not really proper. This is why the writer put it in apostrophes.