The DKC55RCD is the controller used in full-function and PRO Mark III Disklaviers. It records performances, plays music from internal storage, floppy disks, or CDs, and supports Yamaha’s Smart PianoSoft and SmartKey features.
At a Glance
- Generation
- Mark III full-function / PRO controller
- Associated Models
-
Mark III full-function/PRO modelsDU1ADGH1BADGC1ADC1ADC2ADC3ADC5ADC6ADC7ADC3A PRODC5A PRODC6A PRODC7A PRODS4A PRODS6A PRODCFIIISAPRODGT2ADGT7A
- Uses
-
Internal Storage2DD floppy2HD floppyCD
- Recording
-
E-SEQSMF0
- Plays
-
E-SEQSMF0SMF1Audio/MIDI CDAudio CD
- PianoSoft Types
-
SoloPlusAudioSmart PianoSoftSmartKey
- Upgrade Options
-
MIDI/app playbackBluetooth MIDIAnalog/audio accompanimentPianoStream AnalogYamaha controller upgradesDKC-850Media/storage replacementNalbantov
- Bluetooth MIDI Apps
Things to Know
This is a full-function Mark III system, not a playback-only model. It supports recording as well as CD-based features such as Smart PianoSoft and SmartKey.
Mark III PRO pianos store XP performance data inside SMF0 files, with 0–1023 key/hammer resolution and 0–255 pedal resolution. Standard and non-PRO hosts do not gain this precision merely by sharing the DKC55RCD controller family.
A DKC-850 can replace this controller, but the installation requires the correct model-specific harness—not an ordinary VGA cable. My DKC-850 conversion-cable guide explains the original Yamaha cable and the replacement adapters made by Richie Hayes. On a PRO piano, the replacement operates in STANDARD mode and does not preserve PRO/XP recording.
If a computer reports an original Yamaha Disklavier floppy as unformatted, do not format it. My Disklavier floppy-recovery guide explains why this happens, and my tested USB floppy-drive guide identifies hardware that can read 720 KB/2DD disks.
Nalbantov replacements are model-specific. My Nalbantov floppy-upgrade guide identifies the standard, slim, and dedicated versions; do not assume that a generic Gotek—or any Nalbantov—will fit.



