Page 1: Table Of Contents
REBIS AUDIO RA701 MIDI GATE OPERATORS MANUAL CONTENTS Page Installation Audio Operation MIDI Operation MIDI Key Number General Use Drum Separation LED Indicators DC Triggers MIDI Data Specification Controls Rear Panel MIDI Data Table...
Page 2: Installation
The MIDI out can be connected to the MIDI in on any suitable equip- ment, with a standard MIDI lead. If more than one RA701 is being used and a common MIDI out is re- quired, units can be cascaded by connecting the MIDI out on one unit to the Merge in on the next.
Page 3: Audio Operation
AUDIO OPERATION The overall effect of the RA701 is controlled by the GATE section. The IN/out switch is used to bypass the Gate or make A/B comparisons. The maximum attenuation is determined by the RANGE control. Mate- rial with a high ambient level often sounds better with a reduced Range setting to make the gating action less abrupt.
Page 4 The TRIGGER section takes audio signal and turns it into control information for the Envelope section. The Trigger source, normally the input signal, can be changed to the Ext/Key input with the EXTERNAL button. External triggering allows one track to modify the dynamics of another track or tracks. (e.g. use the bass drum to Key a gated bass line).Using the MONITOR button to listen to the trigger source will now allow you to hear the external input.
Page 5 This mode is useful for processing tom-toms if they have a particularly loud ring, or reshap- ing sampled sounds. When operating the RA701 in STEREO the right channel Envelope and Trigger controls are disabled and left channel acts as master controller.
Page 6: Midi Operation
MIDI OPERATION The primary application of MIDI on the RA701 is to trigger drum ma- chine voices with a live or recorded drum track. There are two important things to remember when using the RA701 with MIDI. 1. Good drum separation is vital. Every care must be taken to ensure that the gate can not be fired by the wrong drum.
Page 7: Midi Key Number
On most drum machines it is a simple operation to allocate a particular voice to a given MIDI key number, but if necessary the key numbers (along with the channel and velocity data) transmitted by the RA701 can be adjusted to suit the receiving MIDI equipment.
Page 8: General Use
GENERAL USE The RA701 MIDI Gate is normally used in the channel inserts of a mix- ing desk. If pre and post inserts are available the post eq inserts should be used, and if other signal processors are being used in series with the gate then it should be the last element in the chain.
Page 9: Dc Triggers
DC TRIGGERS The RA701 is fitted with DC Trigger outputs and inputs for each chan- nel. The outputs can be used to trigger drum machines of the pre-MIDI gen- eration, or CV/Gate type synthesisers and samplers. The inputs can be used for remote triggering of the gate or trigger/MIDI interface.
Page 10: Specification
SPECIFICATION Model: RA701 MIDI Gate Channels: 2 Inputs: Maxlevel+21dBm.Impedance 100 kilohms Outputs: Max level +21dBm into 600 ohms. Impedance less than 50 ohms Balancing: Optional electronic Distortion: Less than 0.05% 20Hz to 20kHz Noise: -104dBm. 20Hz to 20kHz. Max attenuation -95dBm.
Page 11: Controls
CONTROLS Gate Bypass: In/Out Range: 0dB to 90dB attenuation Filter Bypass: In/Out Position: Gate (thru signal, pre side chain send)/Trigger (side chain) LF: 25Hz to 5kHz. 12dB/octave HF: 75Hz to 18kHz. 12dB/octave Trigger Mask: On/Off Mask Time: 0 to 4 seconds Monitor: Trigger (post filter)/Main output Source: External (key input)/Main input Threshold: +20dB to -40dB...
Page 12: Rear Panel
MIDI key number selector (0 to 127) MIDI velocity range switch (1 to 3) Per Unit MIDI channel number selector (1 to 16) MIDI output Merge input (Accepts an RA701 MIDI output for serial connection) Fuse holder IEC mains inlet...
Page 13: Midi Data Table
MIDI DATA SWITCH SETTING TABLE Switch positions 'ON' for each range/number Velocity Range Note/Key Number 47 1234 6 87 123 5 7 -20dB to 0dB -10dB to +10dB 1 3 45 7 0dB to +20dB 2 4 49 1 56 89 1 45 7 50 2 56 90 2 45 7...