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Chapter 3: Recording Sequences

Page 26

How Sequences are Organized

A sequence can be thought of as a segment of multitrack tape of

variable length. Depending on the sequence contents, it could be a two-

bar repeating drum pattern, an eight-bar verse, or an entire 200-bar

multitrack composition with time signature and tempo changes. The

MPC60 holds 99 sequences in memory at one time. Only one sequence

can play at one time.

Within each of the 99 sequences are 99 tracks that contain the actual

MIDI events. These can be thought of as the tracks on a multitrack tape

recorder—they each contain a specific instrument or piece of the total

arrangement, but they all play simultaneously. For example, track 1

could be drums, track 2 percussion, track 3 bass guitar, track 4 piano,

track 5 horns, track 6 more horns, etc. Each track can be assigned as a

Drum track or a MIDI track, but not both. MIDI tracks contain normal

MIDI data recorded from the MIDI input and played out through the MIDI

output. Drum tracks are the same as MIDI tracks except for the following:

1. The output of the track plays to the internal drum sound

generator.

2. You can record drum notes into the track using the front panel

pads.

3. In sequence editing screens, note events in drum tracks are

visually identified and selected not by note number only (as

are MIDI tracks), but also by the pad number and sound

name currently assigned to the displayed note number.

4. Drum tracks are not affected by the Transpose function.

In order for the sequencer to play external synthesizers, it must send its

notes out through MIDI on one of the 64 output MIDI channels (16

channels for each of the 4 MIDI output jacks).

Ticks and Bar.Beat.Tick fields

The timing resolution of the sequencer is 96 parts per quarter note (96

ppq). Each one of these divisions is called a tick.

In many of the sequence editing screens it is necessary to enter the start

and end of the region to be edited. This is done using a three-part field,

called a bar.beat.tick field, containing a bar number, beat number, and

tick number. (A beat is the timing value of the lower half of the time

signature. For example, in 4/4 time, a beat is one quarter note.) In

bar.beat.tick fields, you enter the three parts separated by decimal points

(.), followed by ENTER. If you only want to enter the bar number, type it

followed by ENTER—the beat and tick portions will be reset to the start

of the bar.

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Akai MPC 60 Betreibershandbuch Seite 32