Notes: In the spirit of sonic exploration and musical evolution, Grendel bring you the RA-99 Grenadier, an all-analog synthesizer with an original and unique tone palette. It implements parallel formant synthesis with a bank of three voltage controlled filters to generate tones inspired by the human voice, without being limited by the conventional boundaries of speech modeling. Twenty patch points give you extensive self-patching options plus creative compatibility with analog modulars, sequencers and keyboard controllers. … Read more
The RA-99 sound engine is based on an accurate voltage controlled oscillator with variable wave shape. The VCO has multiple CV (control voltage) inputs for creative stacking of the various CV sources available in your studio. There are two 1 volt per octave inputs for melody. It also has a 5 volts per octave input that is ideal for creating octave modulations from an LFO with 5V output. Finally, the 15 volts per octave input is suited to narrow pitch modulations like vibrato and pitch bend. The CV inputs of the RA-99 VCO have wide response bandwidth, allowing FM with audio frequency waveforms.
A subharmonic square wave is generated at a frequency 1 octave below the VCO. Activating the SUB switch mixes this with the VCO output. Raw subharmonic waveform is available from the SUB OUT jack.
A pink noise generator is included to add complexity to the sound. Pink noise is mixed with the VCO at the input to the filter bank. Pink noise volume is adjustable with the knob labeled P-NOISE, and by CV input to the NOISE CV jack. The noise source also adds a subtle amount of jitter to the VCO waveform.
The RA-99 modulation section contains a pair of multifunction waveform generators called MOD1 and MOD2. They can provide (1) gated attack-release envelope, (2) triggered decay envelope, (3) pulse LFO with variable pulse width, or (4) saw-triangle LFO with variable symmetry. In envelope mode, the output is a true exponential slope. In addition, RA-99's MODs can create time delayed gate events, serve as low-frequency audio VCOs (with limitations), or act as frequency dividers. Both MODs have variable output level that is sweepable from normal to inverted polarity. Either MOD1 or MOD2 can serve as the main volume envelope.
The Grenadier RA-99 filter bank combines one low pass and two band pass filters to produce full-bodied tones with resonant character of vowels. The filter bank has three control parameters: ALPHA, BETA, and FILTERS. These parameters are also fully controllable with CV inputs.
This unit requires 12 volts DC and draws a maximum current of 100 mA. Polarity of the AC adapter connector does not matter. It can be tip positive or tip negative.
* Grenadier RA-99 will also operate from 9 volts DC, but please note that the pink noise source will be unavailable in this situation, and distortion may be heard in the output.
The unit is protected against over-voltage with a built-in self-resetting fuse.
It is OK to use a daisy-chain cable to share power with other 12V gear from a single AC adapter, provided the total current demand (mA) does not exceed the AC adapter's rating.
For simplicity, this unit does not have a power switch. It is on whenever its AC adapter is connected to mains power. It is recommended that you plug its AC adapter to a power strip with on-off switch built in.
Main Audio Output
Use a common 1/4" shielded audio instrument cable (mono, TS type) to connect the synth's output to a line input of a mixing board, computer sound interface, keyboard amplifier, or effect processor.
The output impedance is 220 ohms, so it is unnecessary to connect it to a high impedance (HI-Z) input.
You may plug headphones in to this jack, but you'll only hear sound on one side.
A DI Box may be necessary on stage to connect to a PA system.
VCO: 1V/oct (x 2), 5V/oct, 15V/oct, Timbre CV In (controls wave shape)
MOD1: Gate In, Rate CV In, Vari Out, Gate Out
MOD2: Gate In, Rate CV In, Vari Out, Gate Out
Filter Bank: Alpha CV In, Beta CV In, Filter CV In
Audio: Subharmonic Out, VCF audio In, Mix audio In, Noise VCA CV
CV-Gate In: 1 V/oct, +5V Gate
Patch cables: 3.5 mm mono
Audio output: 1/4" analogue unbalanced
CV output range: 0 to +5 volts
MIDI: Not included
Power Input: 12 VDC @ 1.2 Watt
Dimensions: 30 x 10 x 6 cm
Mass: 0.53 kg
Case Material: Anodized aluminum