Loading wav samples into the MC 909 is a simple 5 step process. To load more samples at a time into the internal memory, either 128mb or 256mb RAM can be installed.
Here’s how to import an audio file (WAV/AIFF) as a sample.
1. From the menu, choose “Import WAV/AIFF.”
2. Press [ENTER].
3. Select the sample that you want to import.
*1: If not even check mark is assigned, the operation will be
executed on the file selected by the cursor.
4. Press [F6 (Import Sample)].
A message will ask you for confirmation.
5. To import, press [F6 (Execute)].
The file will be loaded as a sample.
* To cancel, press [F5 (Cancel)].

Expanding the MC 909 memory is very simple, make sure to check the Roland MC 909 manual for detailed instructions.
Specifications of the expansion memory (DIMM)
that can be used:
Number of pins: 168-pin
Speed: 100 MHz (PC100 CL=2)
133 MHz (PC133 CL=3)
Voltage: 3.3 V
Capacity: 128 MB, 256 MB
Board height: 38 mm or less