Akai MPC 60 Operator's Manual download pdf (Page 226)

Appendix

Page 220

Answers to Frequent Questions

If you discover a problem in the Version 3.1 software, we at Roger Linn

Design would appreciate it if you would please read the relevant section

of the manual to make sure you correctly understand the operation

before calling us. Here are some answers to commonly asked questions

and problems:

When I play a particular sequence or song, the timing is irregular.

What’s wrong?

If you notice a timing irregularity in song mode at the point of transition

from one sequence into another, the problem may be caused by

assignments of the Pgm (Program) field (in the Play/Record screen) for

the new playing sequence. When a new sequence is encountered in a

song, any program assignments for the tracks in the newly selected

sequence are sent out at the moment that the sequence starts to play.

This can present a problem because most synthesizers require time to

change programs, which can cause any notes existing at the start of the

new sequence to be delayed. This delay is brief in most synthesizers,

but is usually enough to cause a timing irregularity at the start of the

sequence. To avoid this problem, remove any assignments of the Pgm

field for all sequences except the first sequence in the song. If you are

encountering the same problem when changing sequences while playing

(in which case the new sequence begins immediately following the

current repetition of the current sequence), then use the same solution:

remove all program assignments for the newly selected sequence.

If the timing irregularity does not exist at the beginning of a sequence, it

may be due to the sequence containing a large system exclusive

message at that location, in which case the MPC60 must finish

processing the system exclusive message before playing any other

notes at that location. If this is the case, erase or move the system

exclusive event that is causing the problem.

If the timing irregularity does not exist at the beginning of a sequence

and is not due to a system exclusive event, it may be due to having too

many notes (more than approximately 10 or 12) at one tick in the

sequence. If so, this could cause the last notes occurring at this location

to be delayed. This problem is aggravated at faster tempos. This

problem exists to some degree in all sequencers, and is due to the fact

that there is a finite number of notes that the internal computer can

process at one time. However, this will NOT cause the sequence to slip

out of sync when syncing to an external sync source. To reduce the

processing requirement in your sequence, try the following:

1. Erase any unnecessary events from the sequence. For example,

erase any channel pressure, poly pressure and system exclusive

events if you are not using them. Many keyboards send out large

amounts of channel pressure messages while playing, which are

recorded into your tracks. If you are not using these messages,

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Akai MPC 60 Operator's Manual Page 226

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