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Introducing the ST-224
The following three types of memory are used in the ST- 224.
• Main memory
Volatile memory whose contents are lost when the ST-224 is turned off. Temporarily holds waveform data, pad
parameter setting data, and song data for the internal sequencer.
• Backup memory
Nonvolatile memory whose contents are retained also when the ST-224 is turned off. Serves for
permanently storing the entire contents of the main memory (bulk data). Only one set of bulk data can be stored
in the backup memory.
• Data card (SM04)
External storage media inserted in the [DATA CARD] slot on the rear panel of the unit. Like the backup memory,
it serves for storing bulk data, but it can hold more than one bulk data set (as many as the card capacity allows).
When the store target is a data card, up to 99 sets of bulk data can be stored.
When sampling or song recording is performed with the ST- 224, the waveform data and song data are
temporarily stored in the main memory. During pad play and song playback, the ST-224 will read data directly
from the main memory.
If the contents of the main memory are not saved to internal backup memory or to an external data card
(SM04), they will be lost when the unit is turned off. To prevent losing important data, be sure to save them
before turning the unit off, or more often if there is a possibility of power interruptions. Bulk data saved in
backup memory are automatically read into the main memory the next time the unit is turned on. (This means
that the unit returns to the same condition that was active before the power was switched off.) It is also possible
to manually load data from backup memory or data cards into the main memory.
ST-224 Memory Configuration
Automatic
read-in
at power-on
Store/Read-in
Sequencer
section
Store/Read-in
Read-in
Waveform
data
Pad data
01–99
ST-224
DATA CARD
BACK UP Memory
MAIN MEMORY
Waveform data
PAD
Bulk data
Bulk data
WAV file/AIFF file