Hey Enrico!

From the way I understand it, you are attempting to change the pluck opcode's icps (intended pitch value, which sets the sample buffer size), when instead you want to be changing the kcps (resampling frequency in cps). So your pluck code should look like this instead,

a1 pluck 10000, k1, 300, 0, 1

I am not sure if this is what you were intending to do or not, but I hope this helps in some way.

-Matt

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Original E-mail
From: Enrico de Trizio <enricodetrizio@gmail.com>
Date: 02/21/2010 10:43 PM
To: Csound <csound@lists.bath.ac.uk>
Subject: [Csnd] pitch envelope (beginner question)