What are the HG-30, HG-16 and HG-16 Black modular synths basic requirements? 

All of our HG synths require a Eurorack modular synth case. The synths receive their gate and CV note signals, as well as their power (+5V voltage, 250mA minimum), straight from the Eurorack case bus board. However if needed, the basic HG-30 and HG-16 models have a back panel switch which changes the note voltage input to a front panel envelope input jack.
The HG-16 Black edition instead has designated 3,5mm front panel inputs for the CV note and gate signals. 

What are the output specifications? 

The HG synths all use balanced TRS outputs and the output is line level, however the volume can be lowered from the front panel volume knob. They are typically used as a final module in a Eurorack system, for example they take Eurorack level modulation and envelope control signals as input and typically the output is fed into an amplifier or a PC/Mac digitiser that  use balanced level inputs. If using unbalanced or stereo contacts, you will experience a noisy signal. 

What kind of voltage range do the envelope inputs require? 

The range is 0V-8V. The inputs are high impedance, and tolerate even higher voltages.  Voltages less than 0V or more than 8V will not distort the output signal, the signal simply won’t go higher or lower than the maximum or minimum amplitude. To receive output, at least one envelope input with  a voltage above 0V has to be connected. The constant voltage output on the front panel, marked “D.C. Out” serves this purpose if you do not have any external envelope generators. It can be connected to one or all of the front panel envelope inputs, and therefore necessarily no external envelope generators are required, but then the modulation characteristics are not utilised. 

What kind of voltage range do the pitch bend and velocity inputs require? 

Pitch bend: -2,5V to + 2,5V

Velocity: 0 to +5V. If left unconnected, the velocity is at maximum.

Can you save virtual switchboard settings?

Yes! By flipping the front panel switch into the “envelope select” position, you may route any of the 16/30 front panel faders to be controlled by any of the 4/8 envelope inputs. Once you flip the switch back, the setting will be saved. However, if you reset the power of the synth, all faders will reset back to envelope input 1. Simply flip the switch once again to the “envelope select” position and back. This will recall your envelope input configuration from before! Check our YouTube channel for demonstration videos. 

Does the microphone input require amplification? 

The microphone input is optimised for dynamic microphones and an XLR-3,5mm adapter is included with each synth. The vocoder modes have an autogain feature, but the synth does not tolerate line level input signals. If you are planning on feeding high level signals, a customisation can be made. Please don’t hesitate to ask for more information! 

What are the synths dimensions? 

The HG-30 is 162,5mm x 128,4mm with a depth of 25mm and occupies 32 HP units horizontally. The HG-16 and HG-16 Black are 121,6mm x 128,4mm with a depth of 25mm and occupies 24 HP units horizontally. 

What features set the HG synths’ vocoder apart from classic vocoders?

There are several features that make the HG-16 and HG-30 modular synths’ vocoder modes special, for example:
Easy spectral shifting. This means you can easily change the timbre of your voice continuously. In extreme settings this can sound like a very low giant-style voice or a very high baby-like voice without changing pitch. Unlike the HG vocoder, classic vocoders generally have two fixed, identical filterbanks where each analysis filter controls the corresponding synthesis filter, without the possibility to continuously compress or stretch the analysed spectra.
Noise injection control. With different settings you can either add a subtle amount of noise to the vocoder to give the voice unique character, or with less subtlety you can make your voice sound like a whisper or even a rumble.
Double voice modes. You can add a second, fixed interval voice, from the key of your choosing. You can find several examples from the Media section on our website.
The vocoder modes also have very low latency, and the signal is clean without ringing noises.

For more specific information, please read our manuals at http://www.audiospektri.com/manual 

We also have introductions and tutorials on our YouTube channel at https://www.youtube.com/channel/UCn6dq_kcxq9Buc_0RzwreyQ