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CHAPTER 1: INTRODUCTION
Thank you for purchasing the Alesis D4 Drum Sound Module. The D4 provides over
500 high-quality drum/percussion sounds (many of them in stereo), that use the
same drum recording expertise responsible for making the SR-16 and HR-16
standards in the music world. And thanks to Dynamic Articulation, which triggers
different samples according to velocity, the D4’s sounds have a realism and
presence that make these sounds stand out in any track or performance.

1.0 PRINCIPAL FEATURES

•Over 500 Sounds. Sounds include: 99 kicks, 99 snares, 55 cymbals, 92 toms, 76
percussion sounds, and 80 effects.
•48 kHz Sample Rate and 20 Hz-20 kHz Bandwidth. The D4's high sample rate
and full bandwidth insure maximum audio clarity from each sound.
•12 acoustic trigger inputs. Drummers can trigger D4 sounds with conventional
drum pads as well as MIDI pads. Studios can trigger D4 sounds from existing
taped drum tracks to replace taped sounds with the D4’s high-quality drum
sounds. Older drum machines with individual outputs can be revitalized by using
them to trigger the D4 sounds instead of triggering the drum machine’s internal
sounds.
•Full MIDI implementation. The D4’s master volume responds to MIDI controller
7, allowing for smooth fades and easy changes in overall dynamics, as well as to
other important MIDI controllers including pitch bend. Program change
commands can call up different Drum Sets.
•Simultaneous MIDI/trigger operation. Notes can be triggered by MIDI and/or
triggers simultaneously.
•Trigger to MIDI conversion. Triggers received by the D4 are converted into MIDI
note data that appears at the MIDI Out/Thru connector.
•Single rack space size. The D4 fits conveniently into a single rack space.
•21 programmable drum kits. Assign different drums to different MIDI notes (or
triggers) to create a kit, and recall individual kits with Program Change
commands. A footswitch, when pressed, can increment from one drum kit to the
next.
•Multiple outputs. The D4 offers four outputs, which are arranged as two stereo
pairs. Any sound can be sent to either stereo pair (and panned to any of seven
positions in the stereo field). However, these can also serve as individual outputs
if you pan a single sound hard left or hard right so that it appears over only one
output. One possible application is to use one stereo pair for a mix of drum
sounds, and the other stereo pair as two individual outputs for specific drum
sounds that may need separate processing.