MATRIXSYNTH: G-Storm Electro Introduces Roland SH5-VCF Dual Filter Eurorack Module Adaptation

Tuesday, August 24, 2021

G-Storm Electro Introduces Roland SH5-VCF Dual Filter Eurorack Module Adaptation


video upload by gstormelectro

SH5-VCF Dual Filter Patches + Sounds [Demo #2]

video upload by

"In this video I will show some cool patches with SH5-VCF Dual Filter.
As per usual, listening w/ headphones or quality monitors is the best audio experience.
Watch your levels, this is a filter demo w/ some resonance ahead.


Check my Reverb store for SH5-VCF, 101-VCO, 2xVCA, 2xADSR availability
http://reverb.com/shop/gstormelectro

Currently I only sell exclusively on Reverb, I hope one day to sell in stores outside the USA.

Timestamps
0:00 Sounds and Intro

0:16 Patch 1 | Fat Liquid Bass
2:44 Patch 2 | Series Cascading the Dual Filters
3:01 Patch 3 | Evolving Sequence
3:47 Patch 4 | Analog Percussion
5:20 Patch 5 | Supersaw! Unison Stack
6:33 Patch 6 | Complex Analog Thing

Oscillator | 101-VCO
Modulations | Batumi, 2xADSR
Control + Sequencing | Keystep Pro
No added effects, EQ, Compression, nor other post-processing."



via this listing

"Time to get a little more serious.

SH5-VCF is an all analog Eurorack adaptation of the Roland SH-5 mixer and Dual Filter. There are no filters-on-a-chip here. The SH5-VCF uses all discrete components and quality op-amps to work its special mojo. Like on the original, the Low Pass circuit is comprised of open-collector matched transistor pairs arranged in a diode ladder configuration. The lack of temperature compensation was also respected, so while the resonance can self-oscillate the v/oct keyboard tracking is about 3 octaves at best. This same configuration used in the Roland SH-1000 and the earlier System 100 (not 100m).

The Dual Filters: VCF + BPF
| VCF | The VCF (Voltage Controlled Filter) comprises one HP (High Pass) and one LP (Low Pass) circuit in series. VCF Select switch can choose 1) HP, 2) LP, or 3) BP (Band-Pass) configuration. Due to the unique design, the HP resonance is actually derived by overdriving the LP circuit.
| BPF | The dedicated BPF (Band Pass Filter) has its own discrete circuit distinct and apart from the VCF. The original BPF circuit has been respected, but greatly expanded upon using a proprietary voltage controlled feedback path to enable frequency control via external signals. This feature wasn’t available on the original design. The original did not have a buffered output jack for the BPF neither, as the SH5-VCF does. The BPF Level attenuator will affect the main output only.

The MIXER
There are four audio signal inputs, each with its own fader pot and filter routing switch. Each routing switch can send each audio line to either VCF, BPF, or both VCF + BPF.

The 3 CV MODULATIONS – Choose Wisely
Incoming CV signals can be used to modulate any filter frequency cutoff. Signals can be up to +/- 10Vpp DC polar or AC bi-polar at the inputs.
| CV1 | has inverting and non-inverting behavior where zero is at 12:00.
| CV2 | has non-inverting behavior for both filters, and inverting available to VCF only
| KB | is a non-inverting V/OCT Keyboard Tracking control available to both the VCF and BPF, typically a Keyboard Voltage – but can be any kind of polar or bi-polar signal.

A Eurorack power connection ribbon cable is included. To get the most out of the filter experience follow your filter with a VCA. The filters require startup voltages on the low end to avoid audible thump, so there will be sub-frequency audio seepage. A post-filter VCA (sold separately) is recommended to gate the filter. Be sure to check out the G-Storm Electro 2xVCA when available.

The SH5-VCF pairs well with (sold separately)…
GSE 101-VCO + 101E output expander
GSE 2xVCA
GSE 2xADSR
Xaoc Batumi Quad LFO

Specs
Width | 16HP
Depth | 35mm
Weight | 6.3 oz
Inputs | 4 audio, 3 control voltage
Outputs | 1 main output, 1 BPF output
CURRENT DEMANDS (measured)
+12V: 48mA
-12V: 48mA
+5V: 0V *not used*"

G-Storm Electro Reverb Shop

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