Tascam PORTASTUDIO 788 Bedienungsanleitung PDF herunterladen (Seite 25)

TASCAM 788 Operational Tutorial • 8/2000 Edition MIDI Functions

Section VI

MIDI Functions

IN THIS SECTION:

MIDI Clock & Tempo Maps

MTC (MIDI Time Code) Generate/Chase

788 Metronome

MMC (MIDI Machine Control)

MIDI Program Change Commands

RELATED TOPIC:

Fader Matching

p 25

p 26

p 27

p 28

See Mixer Functions, p 12

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TOPICS

MIDI IN and OUT ports are provided on the 788 for a

variety of control and synchronization functions.

The MIDI OUT port can be used to transmit MIDI Clock

or MIDI Time Code for synchronizing drum machines,

sequencers, or MIDI workstations without using a

track or purchasing extra synchronization boxes. (Keep

in mind that MIDI Time Code and MIDI Clock are not

the same thing; the differences are listed in the sections

dealing with these time code standards.) While the 788

has an internal metronome sound generator, it can also

broadcast MIDI messages to trigger external sound

modules for click tracks.

MIDI IN can be used to control the 788's transport with

MIDI Machine Control, recall scenes, effect patches, or

routing set-ups with program change information, and

even automate the mixer section and effect processors

with MIDI controller messages. If you want to lock the

788 to another 788, or other device, you can set the 788

to follow MTC through the MIDI IN port, as well.

MIDI FUNCTIONS OVERVIEW

Introduction to MIDI Clock

MIDI Clock is a basic synchronization standard that

is commonly found on drum machines and basic

keyboard workstations. It is also commonly supported

on most sequencing software.

MIDI Clock keeps the individual MIDI devices locked

together in musical terminology, using a counting

structure that looks like this:

BAR : BEAT : PPQ

The terms bar (measure) and beat should be familiar,

but PPQ is a new one for some. PPQ stands for Part Per

Quarter; PPQ is the internal subdivision of the quarter

note.

As with any other synchronization chain, one device

is deemed the master. The master broadcasts the

MIDI Clock information, and the others will follow the

MIDI Clock data.

In choosing the master, the rule of thumb is to set

whichever device has to work the hardest as the time

code master. The 788 is processing a lot of data to

record and play back 8 tracks of 24 bit audio, so it

will be the master in your studio. The drum machines

and sequencers will follow the 788.

MIDI CLOCK

While simply broadcasting measures, bars and beats

will help keep the devices together, they typically require

a TEMPO MAP. The tempo map tells each device what

the time signature and tempo of the song is. This helps

each device better anticipate the location of the bars

and beats, and gives them the information on how to

count the beats. Each device in the MIDI Clock chain

will need their own copy of the tempo map.

Setting the 788 to Generate MIDI Clock

The 788 needs to be set to generate MIDI Clock. To

make that setting:

1) Press MENU.

2) Select with the

JOG/DATA dial and press

ENTER/YES.

3) Select with the

JOG/DATA dial and press ENTER/YES.

4) Make sure is set to (internal clock),

and is set to (MIDI Clock).

Editing the Tempo Map

The tempo map in the 788 will list all the tempo and

key signature changes in the song. It is not necessary

to enter the time signature and tempo of every

measure; only the changes need to be entered.

To edit the tempo map:

1) Press MENU.

2) Select with the

JOG/DATA dial and press

ENTER/YES.

3) Select with the

JOG/DATA dial and press ENTER/YES.

4) Press INSERT or DELETE to add or remove changes

in the map. Navigate the list with the CURSOR keys,

and change the settings with the JOG /DATA dial.

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