Akai MPC Operator's Manual download pdf (Page 77)

Section 3: Recording sequences 77

3.17 Recording Midi System Exclusive data

The MPC60 has the capability to record patch library data or any other Midi

System Exclusive messages directly into tracks. To do this, simply send the

System Exclusive message to the MPC60 while in RECORD or OVERDUB

modes, or while in STEP EDIT mode, and it will be recorded into the active

track, just like any other midi data. The only limitation is that the message

must be less than 1000 bytes. If an attempt is made to record a message

which is larger than this, the entire message will be rejected. This will easily

accomodate single voice patch data dumps from any synthesizer, but is not

large enough for many voice bank data dumps (large files containing an

entire bank of single voice data dumps).

One way of using this feature is to insert a blank bar at the beginning of your

sequence and record the voice data dumps for each track into that first bar.

When the sequence is played from the start, each external synthesizer will

immediately receive the voice data in the first bar and is then ready to play

the sequence's note data starting in the second bar.

There is one problem with playing System Exclusive messages from

sequences: there is no standard method for identifying the midi channel

number within the message, and therefore the MPC60 cannot assign the

output midi channel over which the message will be sent. This means, for

example, that a System Exclusive message sent over midi channel 3 while

recording into the MPC60 will always be played out of the MPC60 on midi

channel 3, regardless of the track's output midi channel. To overcome this

problem, you must send the System Exclusive message on the desired midi

channel while recording it into the MPC60. Most synthesizers allow you to

select the transmit channel. However, the Yamaha DX-7 (original model)

always transmits on midi channel 1.

There is a way to change the midi channel of a System Exclusive message

while it is in the MPC60- by using STEP EDIT. The midi channel is

assigned to a single byte within the message and the Step Edit function

allows you to change the contents of any byte within the message. If you

know which byte a particular manufacturer uses for the channel number, you

can change the contents of that byte to the desired midi channel number.

For example, the Yamaha DX-7 System Exclusive messages contain the midi

channel in byte number 3, so whatever number you put into byte number 3

of the message will be the new output midi channel number. To learn more

about editing in step edit mode, read section 4.4: "The STEP EDIT key".

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Akai MPC Operator's Manual Page 77