The ddrum4 Brain is a tone generator with an 8MB flash ROM memory system that ensures sound flexibility. You can download free ddrum4 samples from their Sound Library page.
Features
1000 steps of dynamics
10 trigger input channels with adjustable sensitivity
Channel 1, 2, 8, and 9 with pressure detection
Channel 10 also for hi-hat controller
6 line level audio output channels with separate 18 bit DACs (A1, A2, B3, B4, B5, B6)
1 stereo output for headphones (from output A1 and A2)
4 palettes with 5 user presets each
26 user kits
73 factory kits
Special sound compression format (4 to 6 times)
8 MB Flash ROM for sound storage (equivalent to 32 to 48 MB uncompressed)
ddrum4 sounds can be downloaded via MIDI System Exclusive
Supports reception of MIDI Sample Dump Standard samples
Technical Info
Global Parameter
Button trigger level (1 to 127)
MIDI channel (1 to 16)
MIDI program change (on, off, thru)
MIDI local mode (on, off)
MIDI aftertouch (on, off)
MIDI system exclusive kit dump
MIDI factory initialization
Parameters for Each Channel Global
Trigger type selection (kick, pad, rim, acoustic pad, hand, acoustic 1 to 3, cymbal, hi-hat)
Trigger threshold (1 to 100)
Trigger dynamics (-15 to 15)
Output A assignment (A1 to A2)
Output B assignment (B3 to B6)
MIDI note number (0 to 127)
MIDI note position (1, 2, 4, 8)
Parameters for Each Channel per Kit
Sound selection (10 sound groups with max 999 sounds each)
Variation (1 to 10)
Pitch (-4 to +1 octave in 10 cent increments)
Decay (0 to 100)
Level A (0 to 100)
Level B (0 to 100)
Sound Manager Functions
Select sound
Show sound size
Show memory available
Listen
Mark/Unmark
Delete
Send sounds via MIDI
Physical
Dimensions (W x D x H): 395 x 160 x 77mm (15.6 x 6.3 x 3.0 in.)
Weight: 3.0 kg (6.6 lbs.)
Rack ears are optional. 
