On Stage or in Home, Enjoy Top Quality in a Modern and Portable Form

It’s gorgeous and stately, yet the AT-900C is portable enough to be taken on the road. The contemporary, streamlined cabinet design combines an elegant Polished Cherry finish with eye-catching silver accents. Specially equipped XLR outputs facilitate professional setups for concert performances.

Organ Sounds and Beyond

From the sound of stately classical and theater organs of the silent-movie era to up-tempo jazz and rock organs, MUSIC ATELIER provides organ sounds from around the world, letting you play any genre convincingly. You can even layer authentic Orchestral Voices with the organ sounds, creating sounds and textures that were never possible with conventional organs.

Harmonic Bar Enables Intuitive, Expressive Playing

The new physical Harmonic Bars provide authentic, hands-on control for expressive organ playing. Under the control of the Bars is a Virtual Tone Wheel voice engine derived from Roland’s acclaimed VK combo-organ series. Furthermore, an individual solo bar is provided for the onboard Orchestral Voice, allowing organ sounds to be combined with Orchestral Voices for incredible textures.

Articulation Voices

With new “Articulation Voice” sound set realized by SuperNATURAL technology onboard, the AT-series breathes unprecedented life into Violin, Trombone, Cello, and Tenor Sax voices. Experience the most subtle and expressive characteristics of these classic instruments, including lifelike vibrato, pizzicato, portamento and other authentic nuances.

Convenience & Realtime Playability

With its simple panel layout, MUSIC ATELIER has been designed with priority given to the real-time needs of playing. Buttons are color coded according to function. Selection of sounds, voice layering and balance changes — its design enables complete freedom of expression, with all settings quickly changeable in real time.

Rhythm Section

Swing, country, bossa nova — with MUSIC ATELIER you can play along with rhythms from all over the world. The built-in patterns feature the ultra-realistic groove and feel of professional drummers. By playing simple chords on the lower keyboard, the arranger function (Auto Accompaniment) automatically adds accompaniment, letting you play with a virtual backing band of world-class musicians.

Touch-Panel Magic

To make operations easy, all models feature a large color touch-panel LCD with a quick-start guide built in. The newly expanded screen enables often-used menu icons to be always shown on the monitor.

D BEAM Expression

An incredible feature that must be seen to be believed — MUSIC ATELIER organs let you “touch the air” above the keys to control an invisible infrared D BEAM. Waving your hand over the beam allows you to alter the sound. Amaze your audience!

Instant Storage & Recall

Your favorite voice and rhythm selections, as well as other panel settings, can be instantly recalled from internal memory. In addition, to save and retrieve your precious data externally, simply plug in a USB memory key — the global external-storage standard.

Media Features

Expand your musical universe by incorporating musical content from around the world. If you connect a USB memory key or USB CD drive, for example, you can play along with audio CDs ormusic stored in other formats. Furthermore, if you connect an iPod®or MP3 player to the Roland Audio/Video Port, you can employ the Center Cancel function to minimize vocals, or use the Pitch Change function to transpose the key of your pre-recorded music to your favorite keys. You can even connect devices such as the powerful SA-1000 stage amp, mics, and large screen TVs and displays. Excellent, of course, for playing on your own, but also great for home karaoke and stage performances. Use the supplied remote control to selectsongs and play, return, and stop, or to adjust the tempo and key. Whatever the situation, MUSIC ATELIER is sure to be at the heart of the fun.

Upper: 56 keys (C3 to G7) with 10 levels Initial Touch
Lower: 76 keys (E1 to G7) Waterfall type with 10 levels Initial Touch and After Touch
Option [PK-25A: 25 keys (C2 to C4), PK-9: 20 keys (C2 to G3)]
Expression Pedal, Damper Pedal
(attached to the optional pedalboard PK-25A, PK-9)
Foot Switch
2 (on the expression pedal, function assignable)
Sound Generator
Conforms to GM2/GM/GS/XG lite
Maximum Polyphony
450 Voices
(Included 4 Articulation Voices and 31 Active Expression Voices)
Drums/SFX Sets
18 Drum Sets + 1 SFX Set
Manual Percussion Sets
14 sets
Rotary Sound, Chorus, RSS Reverb, Sustain, Vibrato, Pitch Bend, Glide
Upper Part: Organ, Symphonic, Orchestral
Lower Part: Organ, Symphonic, Orchestral
Solo Part: Solo
Pedal Part: Organ, Orchestral
Vintage Organ
Flute (with harmonic bars), Pipe, Theater
Other Functions
Memories: 12
Functions: Load Next, File Edit
Harmony Intelligence
36 types
Master Tuning
415.3 Hz to 466.2 Hz (0.1 Hz steps)
Key Transpose
-4 to +7 (in semitones)
Playback Transpose
-6 to +5 (in semitones)
300 rhythms in 10 groups x 4 variations
User Rhythm
User Rhythm
Rhythm Customize
Pattern editing of the internal rhythms
(Drum Set, Beat, Tempo, Note)
Arranger Function
Tempo, Arranger On/Off, Start/Stop, Sync Start, Intro, Ending, Intro Count Down, Break, Auto Fill In, Variation (4 variations), One Touch Program, Chord Intelligence, Chord Hold, Leading Bass, Auto Standard Tempo, Rhythm Mode
Music Assistant
700 titles x 4 variations
One Touch Program
300 rhythms x 2 groups x 4 variations
Quick Registration
216 settings in 11 groups
7 tracks
Note Storage
Approx. 40,000 notes
Song Length
Max. 999 measures
Quarter note = 20 to 500
120 ticks per quarter note
Realtime (Replace, Punch In/Out, Loop)
Edit Function
Delete Measure, Delete Track, Erase, Copy, Quantize
Score Display
(Great Staff, G Clef Staff, F Clef Staff, with note name, with Lyrics)
File Storage
USB flash memory, Floppy disk
Save Format
MUSIC ATELIER original format, SMF format 0
Max. 99 songs for each folder
Rated Power Output
80 W + 80 W
Tweeter: 5 cm x 2
Full-range: 8 cm x 2
Woofer: 20 cm x 2
Graphic 800 x 480 dots backlit color LCD with touch screen
Audio Output Jacks (L/mono, R), Balanced Audio Output (L, R), Aux/Drums Output Jacks (L/mono, R), Bass Output Jack (mono), Audio Input Jacks (L/mono, R), External Input Jacks (Camera, DVD Player In, Ext In), Video Output Jacks (Analog RGB, Video), Phones Jack (stereo) x 2, Mic Input Jack, MIDI connectors (In, Out), USB (MIDI) Jack, External Memory connector (USB Flash Memory connector), Ext Drive connector, PK In connector, AC Inlet
Power Supply
AC 117 V, 230 V, 240 V
Power Consumption
220 W
Polished Cherry
Console Cover, Music Rest, 2 screws for the Music Rest, Code Hook, Panel Sheet, Power Code, Remote Controller, Dry-cell Battery x 2, Owner's Manual, Voice
Bench (BNC-23), Pedalboard (PK-25A, PK-9), Stereo Headphone, USB Flash Memory, USB Floppy Disk Drive, CD Drive Holder (DH-01), Microphone
System requirements of USB (MIDI)
Operating System: Microsoft Windows Vista®. each edition/Microsoft Windows® XP
Home Edition Service Pack 2 or later/XP Professional Edition Service Pack 2 or later
Computer: Windows-compatible personal computer equipped with a USB port
CPU/Clock: Pentium processor 400 MHz or higher .
Memory (RAM): 256 MB or more
Operating System: Mac OS X v10.2 or later
Computer: USB ready Apple® Macintosh®
CPU/Clock: PowerPC G3 233 MHz or higher
Memory (RAM): 256 MB or more
* The ATELIER will not operate in the Mac OS X Classic environment.
Size and Weight ( Total )
1,299 mm
51-3/16 inches
683 mm
26-15/16 inches
1,289 mm
50-3/4 inches
102.0 kg
224 lbs. 14 oz.
Size and Weight ( Consol only, included Music Rest )
1,299 mm
51-3/16 inches
683 mm
26-15/16 inches
525 mm
20-11/16 inches
64.0 kg
141 lbs. 2 oz.
*The specifications are subject to change without notice.



Updates & Drivers


If you have questions about operating your Roland product, please check our Knowledge Base for answers to the most common questions.
You can also contact our Product Support department by phone or email.
In addition, we have a library of Owner’s Manuals and Support Documents that you can download and reference.

Owner's Manuals