Blue GS-e7 Analog Polyphonic Multitimbral Synthesizer

Note: Auction links are affiliate links for which the site may be compensated.

via this auction

"Awesome 4 part multitimbral 7 voice analog poly from Argentina...

Comes with power supply, original box and leatherette dust cover."

You can find demos, details and pics of other colors of the GS-e7 here.

CLICK FOR MORE »

Blue GS Music e7 - 7 Voice, Multi-timbral Analog Poly Synth

Note: Auction links are affiliate links for which the site may be compensated.

via this auction

The e7 comes in Blue, Red, and Black. You can find demos, details and additional pics in previous posts here.

CLICK FOR MORE »

GS Music e7 Patches [Bank 1] by synth_nyc

GS e7 // 7 Voice Analog Synth //

Just Sounds, No Talking video upload by Jorb

The Best Analog Polysynth You Haven't Even Heard Of...

video upload by Jorb

See the GS Music label below for more.

GS Music GS-e7 7-voice Analog Polysynth

video upload by GS Music

You can find additional demos and pics of the GS-e7 in previous posts here.

Available in Blue, Red, and Black.

"We would like to introduce our new Analog Polyphonic Synthesizer, e7. It is a 7-voice, 4-part multitimbral desktop synthesizer, also featuring MIDI polyphonic expression (MPE). This instrument is the result of years of research and development to come up with the first analog polyphonic synthesizer ever made in Argentina.

Signal path
The signal path is completely analog, featuring two VCO per voice, a white noise source, a mixer, a 4-pole low pass VCF and a VCA. The control voltages are digitally generated, including 3 LFO, 2 ADSR-type envelope generators. Finally, it has a stereo digital effects processor with Delay and Chorus. LFO 1, LFO2 and the delay can be synced with the MIDI clock using a user selectable subdivision.

Oscillators
It features two VCO plus sub oscillator per voice. Each oscillator has 3 different waveforms: triangle, sawtooth and saw-tri (triangle+sawtooth). There is a fine-tuning adjustment and a transpose option, allowing tune adjustment up to +/- 2 octaves. Tuning can also be modulated with any of the three LFOs and EG1.
Furthermore, each oscillator has a pulse wave that can be turned on or off, which is mixed with the other waveforms. Its pulse width can be modulated with LFO1 and/or EG1. Oscillators can be hard synced.
The autotuning algorithm takes about 2 seconds to complete. All the voices are tuned in parallel, making a lot faster than usual.

Mixer
The mixer can control the levels and mix the two oscillators, the suboscillators and the white noise or the external input.

Filter
The filter is a 4-pole ladder-type low-pass filter with resonance control. It can be modulated with EG1, this modulation an also be affected by velocity. It can also be modulated with any of the 3 LFOs. On the other hand, it features keyboard tracking and it can be controlled by the modulation wheel or aftertouch.

Chorus
There are two types of chorus available: basic and ensemble. The Basic algorithm is subtle and allows you to add some spatiality tothe resulting sound, while the Ensemble algorithm adds a different dimension to the sound, simulating a string or vocal ensemble. The Basic algorithm uses two delay lines, while the Ensemble uses 4 delay lines. Each delay line has its own internal LFO. There are controls for rate, depth and mix.

Delay
The delay can be a stereo delay or a ping pong delay, with its maximum delay time being as long as 1.35s. It is possible to sync the delay to the MIDI clock too. If the delay is synced, the delay time knob controls the time division instead of the delay time. There are controls for the feedback and mix too.

LFOs
There are three LFOs available. LFO 1 and 2 have 5 waveshapes: triangle, ramp up, ramp down, square and random with sample and hold. LFO 3 has the first 4 waveforms and is activated with the modulation wheel and/or aftertouch.
LFO frequencies go from 0.1Hz to 100Hz. Additionally, LFO 1 and 2 have different modes:
Monophonic: The LFO is in phase for all of the voices.
Polyphonic: The LFO is generated to a slightly different frequency for all of the keys pressed. This allows an interaction of the phases, generating more complex modulations.
Keyboard Tracking (KB Tracking): The LFO frequency varies according to the note played following the chromatic scale.
Keyboard Sync (KB Sync): The LFO is restarted when a key is pressed. Each voice has its independent LFO.
Clock Sync: The frequency of the LFO is synced to the MIDI clock signal. The e7 automatically detects the BPM of the clock signal. It can be configured to generate different rhythmic figures.
Keyboard + Clock Sync: The LFO frequency will be a sub-division of the MIDI clock signal. Also, the LFO will be restarted each time a key is pressed.

Envelope generators
There are two ADSR-type envelope generators. There are controls for attack, decay, sustain and release. Attack and release can be modified by velocity and the envelope times have keyboard tracking.

Stereo
By default, the voices have a stereo panning from left to right. By adjusting the stereo spread, it is possible to set all voices to the center or set them from right to left. There is also a stereo motion option that allows this stereo spread to be adjusted by an LFO.

Presets
The synth can store up to 640 presets, 128 of them being multitimbral presets.

Multitimbral
The synth can have up to 4 multitimbral parts. Each part has it complete sound configuration, assignable MIDI channel, keyboard zone, velocity zone, transpose setting and MIDI filter. Additionally, each part can have different voice assignments and/or share some voices.

MIDI Polyphonic expression
MIDI Polyphonic expression is supported by the GS-e7. It was tested using GeoShred, allowing independent pitch control and cutoff for each voice."

GS Music e7

Note: Auction links are affiliate links for which the site may be compensated.

via this auction

You can find demos in previous posts here.

"It's a really great sounding analog poly with 7 voices. Everything is on the front panel with some of the deeper functions accessed with a shift function key. All the classic poly sounds are there!

Lovely voice spreading left to right and also "stereo animation" which moves the voices across the stereo field and is nicely visualised on the little screen!

2 oscs and 2 subs per voice
2 env
3 lfo
patch split and stack
lots of mod options available without menu diving"

CLICK FOR MORE »

ESK - Working on a track with the GS Music e7

video upload by Metunar

"Playing with the GS Music e7 Synthesizer while recording. This track is for a new live set.

http://www.metunar.ch"

I hear you now (Intro using Apollo and Apollo Mini synthesizers)

video upload by GS Music

"Here is a short video showing some of the capabilities of these little synths. Both can be used in monophonic or duophonic mode and can store user presets.
The apollo also has some CV inputs, chorus and delay.

Original song by Vangelis, from 'Jon and Vangelis'"

ESK - GS Music e7 Sound Demo - Part 2

video upload by Metunar

"Sound demo part 2 of the GS Music e7 played with keyboard or sequencer. All sounds are from the e7.
The e7 is a 7 voice polyphonic analog synthesizer from Argentina.
Direct recording without external effects.

http://www.metunar.ch"

See the GS Music label at the bottom of this post for more.

ESK - GS Music e7 Sound Demo - Part 1

video upload by Metunar

"Sound demo part 1 of the GS Music e7.
It’s a 7 voice polyphonic analog synthesizer from Argentina.
Direct recording without external effects.

http://www.metunar.ch"

See the GS Music label at the bottom of this post for more.

GS e7 first unit test

video upload by GS Music

"We finally assembled and turned on the first unit of the GS e7.
We were so excited that we hadn't realized that the camera was slightly ou of focus.
There are still some details to keep on working and we are starting the production for the first pre-order batch to be delivered in a few weeks.
We will make more extensive demos once we finish the first batch."

GS Music GS-e7 prototype preview by Ernesto Romeo

video upload by GS Music

Update: don't miss the last 30 seconds for the ending. Thanks to Anonymous in the comments for all this out. 

"We visited 'La siesta del Fauno' studio where Ernesto Romeo played an early prototype of our desktop 7-voice analog polyphonic synthesizer.
We didn't expect to record any video but the moment was just magic. Ernesto explored a lot of the synth capabilities for over 3 hours.

No external effects were used."

Improvisation with GS Apollo Analog Synthesizer

video upload by GS Music

"Our friends Van Shake and Mauricio Gayol having fun with GS Apollo Analog synthesizer."

Improvisation with Apollo synthesizer by Van Shake

video by GS Music

"Amazing improvisation by Van Shake using our new Apollo Synthesizer."

"GS Apollo is an analog monophonic synthesizer featuring subtractive synthesis. The sound generation is entirely analog. It has two voltage controlled oscillators (VCO), a mixer, a voltage controlled filter and a voltage controlled amplifier (VCA). The control signals are digitally generated by a microcontroller, which is capable of processing three low frequency oscillators (LFO) and two ADSR envelopes (EG). It also features a digital effects processor with chorus ensemble and delay. At the end of the signal path, the analog signal and the processed signal are mixed by an analog mixer."

See the GS Music below for more.

GS Music (institucional, english subtitles)

GS Music

"A brief introtuction to who we are and what we do.

Una breve introduccion de quienes somos y que hacemos."

Sintetizador Apollo - Modo monofonico/duofonico

GS Music

"This time we show you how to switch between the different monophonic and duophonic modes of the new Apollo synthesizer.

To access the mode selection, keep the LFO1 button pressed until three of the LFO LEDs start to flash.
Then, with the button of oscillator 2 we can toggle between the different modes.
The Apollo synthesizer has 4 modes detailed below:
1- Monophonic, single trigger: it is a monophonic mode. Envelopes will only reset when no note is active and a new note is triggered again.
2- Monophonic, multi trigger: it is a monophonic mode. Envelopes will reset with each note, even if another was previously active.
3- Duophonic 1: it is a duophonic mode. When a single note is active, both oscillators will respond to that note. When two notes are active, Oscillator 1 will respond to the lowest and Oscillator 2 to the last. As notes are released and one is active, both oscillators will respond to the only note that was left active.
4- Duophonic 2: it is a duophonic mode similar to duophonic 1 but when releasing notes until only one is active, the oscillators will respond to the last two notes.
Once selected, it must be confirmed by pressing the LFO1 button twice."

You can find additional posts on GS Musi Apollo synth here.

Some synth sounds from "Self Control" by Laura Branigan

GS Music

"We decided to go for another sounds on the high end of the new synth."

Analog synth vibrato with hand movement

GS Music

"We connected an accelerometer to the pitch CV input on the new GS Apollo synthesizer and this is what we got.
The accelerometer module was slightly modified. Some filters were added in order to achieve a better response.
No modulation wheel or aftertouch was used."

Rambo: First blood (opening theme cover)

GS Music

"Recreating the opening theme from the 1982 movie 'First blood'.
Using the new Apollo synthesizer and an acoustic guitar."

Aquatarkus with new Apollo synth prototype

GS Music

"Covering Aquatarkus by Emerson Lake and Palmer using the new Apollo analog synthesizer prototype, featuring delay and chorus, among other new features."

See the GS Music label below for more.