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S90 and the SQ01 Demystified 
The SQ01 is a powerful Windows audio/MIDI 

sequencer that can be used with your S90. To 

take advantage of this sequencer you will need to 

install both the SQ01 and the VOICE EDITOR 
for S90 
on your computer. Please follow the 

installation guide in the TOOLS for S90 booklet 

that accompanies your unit. 
 

MULTIPLE PORT USB INTERFACE 

If you want to use the S90/SQ01 as a MIDI/Audio 
sequencer with Remote Control over the audio, 

you need to use the S90 as your USB MIDI 

interface. You can send tracks to it from the 

external sequencer software to address it via a 
Multiple PORT system. 

 

 

• 

Press UTILITY 

• 

Press F5 MIDI 

• 

Press SF4 OTHER 

• 

Set the MIDI IN/OUT to USB 

 

The 5-pin DIN connector on the back (the 
standard MIDI jack) is a single PORT system. 

USB, on the other hand, is a multiple PORT 

system. Each Port can have potentially 16 MIDI 

channels. PORT 1 (always) addresses the internal 
Parts of the S90. Where Port 2, for example, can 

be used to address any PLG150 series Boards that 

you may have installed in the unit. Port 3 will be 
to control the AUDIO MIXER. 

• 

Press UTILITY 

• 

Press F6 PLUG 

• 

Press SF2 MIDI 

• 

Set the PLG150 Boards to Port 2 

 

 

When you click on SETUP on the toolbar of the 

SQ01 you can select MIDI > Device you can set 

the Ports. This will establish communication 
between the S90 and the sequencer. Each MIDI 

track can be routed to the Yamaha USB OUT and 

assigned a specific MIDI channel. For example, 

you might have sixteen S90 PARTS, 01-16, on 
MIDI channel 1-16: via Yamaha USB OUT 0-1. 

You might have several PLG150-series boards - 

they can be set to receive on MIDI channels 1, 2 
and 3 with no conflict, if you have set your PLG 

boards to Yamaha USB OUT 0-2 MIDI channel 1-

3. These tracks will be totally discreet because 

they are on separate PORTS.  
 

We will be using three Ports. Highlight the USB IN 

and OUT devices as shown below. Port 1 will be 
internal S90 Parts; Port 2 for PLG150 Boards and 

Port 3 will be used for Remote Control functions 

for the Audio Mixer. 
 

 

 

SELECTING SOUND FROM SQ01 

You will be able to select Voices from any bank of 
the S90 using a search engine like this: 

 

 
Here’s how to set this up: In the far left CONTROL 

column of the Track View screen of SQ01 (on 

MIDI tracks) you will see the GENERATOR and 
VOICE boxes. Here you can select Voices for MIDI 

tracks by setting the "Generator" to S90 and then 

 

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