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Roland EF-303

 

 

 

Roland EF-303 goove effects

infoCountry: Japan
Weight: 1,9 Kg
Dimensions: 303 x 23 5x 92,5 mm
audio demo trend price : 200€
manual demo video comments

Roland EF-303
Groove Effects (1999)

 

Dj-oriented machine with step value modulations inspired from analog sequencer.

The EF303 also includes a VA digital drum machine and a TB -303 emulation.

Roland EF-303 logo
steps effects

info EFFECT MODULE Main panel features a segments display, 16 sliders, 7 knobs and 30 buttons.

Rear panel terminal connectors:
- Midi interface
- RCA stereo outputs
- headphones
- microphone input
- line RCA input switch between line / phono with ground terminal for turntables.



ac Power supply
is a 9V external DC PSU negative polarity -)+

 

 

 

edit VOICE internal DSP resolution works at 20 bits / 44 kHz sampling rate.
The EF-303 groovebox manages 3 sound sections:
- a digital modulator effect processor (1)
- a virtual analog TB303 bassline emulator (2)
- a virtual analog drum machine (3).


schema




edit
MODULATOR the 16-steps modulator is especially designed for real-time visual performance.
The principle is quite simple: the step modulator cyclically changes the effect settings to a specified values and creates moving textures or rich rhythmic patterns. It is also possible to set the number of steps for a sequence, up to 16 at 480 ticks per note resolution.

MODULATION MOTION: effect motion can be played in 5 modes:
- forward -->
- backward <--
- forward / backward .--><--.
- pendulum --><--
- random -?-


steps modulators ef303


edit EFFECTS the machine features 16 algorithm effects:

pot filter : classic cutoff filter with resonance and a digital LFO
pot isolator: boosts or cuts specific frequency ranges on 3 bands between low / med / high
pot flanger: classic short delay metallic effect with LFO modulation
pot pan delay: echo with panning ping-pong effect
pot reverb : adds reverberation
pot pitch/delay: shift the pitch and adds a time delay
pot slicer/pan: tremolo effects with stereo panning variation
pot comp: adds compression
pot LO-FI: reduces sound quality lowering the sampled BIT depth (a bit crusher)
pot ring mod: adds a digital ring modulator
pot phaser: phase shifting effect with own LFO
pot voice: formant pitch shifter designed as voice changer, special ROBOT mode for synthetic voice effect
pot vo Mod: tracks the incoming signal and triggers the internal synbass synthesizer.

disaply



edit
DRUM MACHINE is based on modelling virtual analog. internal DSP generates 5 electronic percussions with no possible edit. Patterns are recorded using the step modulator, in this case each slider is split into 5 equal zones and each of them corresponds to a specific percussion between:
- mute (no sound)
- open hihat
- closed hihat
- snare drum
- bass drum.
demo internal VA drum machine HEAR

drum machine



edit
TB303 is also virtual analog and emulates the famous TB303 bassliner: notes are entered using the step modulator sliders from bottom position for lower octave to higher, in addtion the bassliner has some sonic controls including filter cutoff, resonance and slide emulation (but no accent "twang").
demo internal TB303 HEAR


tb303 vs ef303




editSYNC
internal frequency range is from 40 to 240 BPM or defined by TAP button.
It is possible to slave the EF303 to a external Midi clock or engage the AUTO-DETECT function that digitally counts the BPM from external signal and automatically syncs the patterns.
The sync function provides 12 tempo dividers: 16th, 16th dotted, 8th, 8th dotted, quarter, half note, whole, two whole notes, four whole notes, 16th triplet, 8th triplet and quarter note triplet.
MIDI synth and drum can be triggered by Midi and Ef303 knobs transmits Midi CC#.


midi clock

 



edit MEMORY:
- 16 setups that can be data dumped to Midi sysex.
- 21 tuning scales including chromatic, diatonic, minor, dominant, whole, pentatonic and more.

ef303 motherboard

 

demoVST PLUGIN no official roland EF VST PLUGIN, however some alternatives:

  name price demo
BigSeq2 Audio damage

-AdrenaLinn Sync Software Plug-in

-BigSeq2 Audio damage

Commercial VST

video

 

 

demo AUDIO DEMO

demo Synched loop with stepped filter
demo Synched loop with stepped filter 2
demo high speed phasing sequence
demo filtered pad
demo pattern II

demo Tb-303 emulation
demo flanger
demo flanger 2
demo texture
demo drum machine VA modeling

 


video VIDEO SELECTION

Roland EF-303 Roland EF-303 Roland EF-303
video1 video2 video3

 

 

ef 303 laptop



Company: Roland
Model: EF-303
Class: effect module
Dates: 1999
Price: 250€
Technology: digital effect
Synthesis: Virtual Analog
Resolution: 20 bits
Sampling rate: 44 kHz
Algorithms: 16
Sequencer: 16 steps
Sync: Midi clock
Memory: 16 slots

Demo: 10

 

manual
MANUAL

 

edit

EF303 Factory Reset procedure

hold shift, turn on, press WRITE, CONFIRM

 

manual
-SERVICE MANUAL SCHEMATICS
-more demos

 

 

ef303 gadget
edit editMug o'Ef303

 

 

ef303


Roland EF-303 FOR SALE
tb303 vs ef303
CHECK OUT EBAY OFFERS

 

ef303

 

 

 

motherboard roland assy japanese
awardSPECIAL AWARDS:

solid
original IDEA

solid
Ugly 303 emulation

comment

"EF303 is limited but original and fun! why it is only limited to a bunch of standard Roland effects? as an analog CV sequencer it would have been great! The Tb 303 emulations is simply awful."

manual manual
-idea - RCA cinch
-step sequencer
-drums and tb are below average
-synthesis functions -no CV sequencer options

 

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Roland ef303 3.0 out of 5 based on 41 ratings. price €150