The MOX6 and MOX8 synthesizers are a subset of Yamaha's popular Motif range, borrowing the majority of their design from the Motif XS. Although having no onboard sampling or audio recording facilities of their own, they are designed to serve as the heart of a compact audio/MIDI music production system. Simply connect one via USB to a DAW-equipped laptop, add a microphone and a pair of headphones, and you have a keyboard-based recording setup that's light enough for one person to carry around.
Both MOX models are of comparatively lightweight construction, so they're far more portable than your typical synth workstation. The 61-note MOX6 on review here, at a mere 7kg, can be lifted easily with just one hand. The 88-note MOX8 weighs in at 14.8kg, which may prove to be more than just a handful for some, but is still remarkably light for a weighted action keyboard. True portability would, of course, mean the option of battery power, however, the MOX requires mains power for its external 12V PSU, so producing smash hits in a rowing boat is probably not an option.
The internal synth architecture of the MOX is essentially the same as the Motif XS — the two instruments even share the same sample ROM and Preset Voices. There are changes and additions to some menus, and occasional operational variances, but since none of them represent a drastic departure from the overall functionality of a Motif XS, this review will concentrate on the more immediate differences.
Yamaha have kept the cost, size and weight of the MOX6 to a minimum in several ways. Most obviously, the construction is almost entirely of plastic. Despite this, it feels sturdy enough, without too much of the plasticky 'creaking' feeling you might expect. The synth-action keyboard has a shortened front-to-back scale and no aftertouch, there is no ribbon controller, the monochrome LCD display has the same 240 x 60 pixel dimensions as that of the Motif ES, and the real-time controllers comprise only eight knobs and no sliders.
Most of the controls from the display to the right-hand end of the panel will be familiar to XS users; the most significant changes are all on the left-hand end. The functions of the eight control knobs vary slightly from the XS: there are fewer arpeggio and EQ parameters, replaced by chorus and reverb preset selectors, portamento time and volume. The volume knob serves as a substitute for the missing level faders; Part levels can be adjusted here, but only one Part at a time. A pair of long-overdue transpose buttons has also been included. The AF1 and AF2 buttons can now be controlled via a footswitch (hooray!), so you no longer have to remove a hand from the keyboard when playing voices that feature sound variations assigned to these buttons. The audio input gain knob has moved from the rear panel to the top, with its own on/off switch.
New to the MOX are an eight-segment LED meter and a DAW level slider. The meter can be switched to display either the audio input level or the signal level at the MOX's output (ie. the sum of the internal synth and incoming DAW audio, more on which later).
The rear panel largely resembles that of the XS, but with one stereo output, one assignable foot-controller jack, and no S/PDIF output, Ethernet connection, or mLAN expansion slot. The USB To Host socket makes the latter three connections redundant, since it handles all the audio and MIDI communication between MOX and computer.
There are a few economic concessions to the MOX's internal workings compared to the XS. The biggest cutbacks are the absence of any sampling facilities and the halving of the maximum polyphony to 64 notes. The number of Insert effects available in song and mixer (ie. multitimbral) modes has also been reduced from eight to three. While these limitations obviously restrict how much the MOX can do at once, the whole point of the MOX is that tracks can be rendered as audio direct to your DAW, and their MIDI tracks archived. Insert effects can be reassigned as and when instruments require them, and those instruments rendered to audio. It's not all about cutbacks, though: 87 new arpeggios bring the total to 6720, the sequencer's capacity has been almost doubled, to 226,000 notes, and the Favourites category has its own dedicated button for quick recall of frequently used Voices.
Performances consist of up to four parts, which can be layered and/or split, with independent arpeggiators available for each Part. Many MOX preset Performances include arpeggiators to provide rhythmical synth textures, automated bass parts and drum patterns, and can be useful sources of songwriting inspiration. Performance Creator is a new fast-track tool for making your own multi-layered Performances. Using any Voice as the starting point, pressing Layer invokes the Category Search window. Choose the desired sound category and Voice, press Enter, and that Voice is automatically layered with the first Voice, assigned to Part two. Adding a bass with a keyboard split to the third Part is just as easy: pressing Split invokes the Category Search window again, which now includes split point and upper/lower parameters. Choose whether you want the new Voice to be above or below the split point, and you're done. Pressing Drum Assign adds a drum kit with an arpeggiated drum pattern automatically activated (drums are always given to Part four). If you want to change the drum pattern, just hit Arp Edit and select a style and pattern from the vast number available.
DAW Audio Recording
The USB To Host connection enables MIDI and audio data communication between the MOX and a computer. The MOX functions both as a synth and a soundcard/audio interface, so no additional hardware is required. It's capable of transmitting up to four simultaneous channels (as two stereo pairs) and receiving two channels (your DAW's stereo output). Audio routing within the MOX is straightforward: there's an option to transmit just the first audio pair, or both together. Generally, signals from the MOX's audio input travel down the Stereo 1 pair, while synth sounds appear on Stereo 2, making it possible to record a vocal and the MOX's performance together, onto separate tracks of the DAW. Each MOX sequencer Part can also be routed to either stereo pair, so by hard panning instruments you can record up to four mono parts at once to separate audio tracks.
The MOX also acts as a remote control for your DAW, the level of functionality depending on which DAW program you're using (see the 'DAW Remote Control' section elsewhere). And as you'd expect, the MOX speaks fluent MIDI, handling all 16 channels in both directions. To access all these features, it's necessary to install the latest Yamaha USB driver on your computer. Once installed, the MOX will appear in the DAW's device lists: four MIDI inputs and outputs, two stereo audio inputs with mono L/R options for each stereo pair, and one stereo output. MIDI note data is handled by MIDI port 1, while DAW remote-control data is addressed over MIDI port 2.
The Yamaha driver has no problem co-existing with other MIDI drivers, but you may well find it necessary to deactivate other audio drivers your DAW uses. This was the case for me in Sonar, where the Yamaha audio drivers were unavailable until my usual soundcard's drivers had been deactivated. After that, everything went swimmingly — audio could be recorded from both MOX audio ports, and Sonar's audio output appeared in all its glory at the MOX's stereo output jacks. Different audio routings and MIDI settings may be needed according to the task in hand, so the MOX provides instant access to six Quick Setups pre-configured to the most likely scenarios. Any of these can be customised to your own requirements and stored to any of the six Quick Setups, saving time and menu-surfing when you're on a roll.
DAW Remote Control
The MOX can remotely control DAW functions, and includes remote-control templates for Cubase, Sonar, Logic Pro and Digital Performer. Users of non-Steinberg DAWs must manually configure their DAW's control-surface settings to match, typically using the basic Mackie Control template. If you're using Cubase with the MOX6/MOX8 Remote Tools software installed, the MOX will automatically configure Cubase's remote control setup for you. I set it up to work with Sonar, which responded correctly to the MOX's transport control functions, with the exception of the 'return to zero' button and the AI data dial.
The MOX also has 50 templates for controlling a range of popular soft synths via its control knobs. The functions of each knob vary according to the selected synth template, and cycle around three rows of parameters using the knob 'function' buttons. All eight knobs are operational if you're using Cubase, but only knobs 1 to 4 will work with non-Steinberg DAWs. On trying this feature with a number of synth templates for which I have the software, everything worked exactly as intended. Knobs 5 to 8 give Cubase users access to additional remote functions, the specifics of which depend on the selected template.
True portability implies something you could easily use on a bus or a plane, which clearly isn't possible in the case of the MOX. However, the MOX6 is certainly light enough to carry around in a gig bag along with a laptop without too much hassle, making an ideal combo for hotel-room writing sessions, recording band rehearsals, or capturing moments of inspiration just about anywhere there's a mains supply to hand. The MOX is, of course, a highly capable synth in its own right, equally at home as a principal part of an on-stage keyboard rig or in any recording situation — and one your roadie will appreciate, too.