Using B104 macinoshes for music 271

CONTENTS

INTRODUCTION

This page contains directions for using the B104 macintoshes and getting sound and MIDI in and out of them. This version is tailored for the MUSIC 271 course, fall 2007.

To get started you will need an account (ask Miller, Tom, or Joachim). The door code to the room comes from the music facilities office.

The Left-hand-side mac

This is also known as the Pro Tools Mac. The main trick is to open the Digidesign CoreAudio Manager and make sure it gets sync from "external word clock" (which comes from the Big Ben clock generator. For best results the Big Ben should be running at 44100.

At the moment Pd is installed but not the PDRP patches.

The Right-hand-side mac

To start up a patch (for instance, the one for Stria), open the "Finder" and go to "Applications" (icon on left hand side of a new window) and click to "PDRP", then to "patch", then to "chowning-stria". Open the patch, "stria.pd".

Before fooling with the patch, you might want to run "test audio and MIDI" from Pd's Media menu to make sure things are set up right.

For AUDIO OUTPUT, make sure the "MOTU 828 MK2" is turned on and that it is synced to external AES (sample rate to "ext", sync to AES." The 44100 light should be on. (Sync comes from the Big Ben clock generator on the left-hand side rack, which must be at 44100 for the MOTU to work. If not, you might see the main output VU meters all the way up on the MOTU. If the MOTU is set up right, nothing appears on any VU meters even if the test tone is turned on.

On the mixer (Yamaha O2R96), pull the "stereo" slider down. Then on the patch, set the "test signal" control to -20 (it's off when you first load the patch). Then gently raise the "stereo" slider and hope you hear an A out the speakers.

If you don't get it, first check a couple of things. The "on" button above the stereo slider should be lit. Directly above that, find four "layer" buttons, go to "25-48" and check that channels 33 and 34 are up. Go back to layer 1-24 or something jst to keep the next person out of trouble. All th way to the right and halfway up the surface of the mixer, check that the light-colored "control room level" knob is partway up (halfway is fine). Above that, check that the "stereo" button is lit.

if you run out of ideas, try recalling preset 1.