Frequency Central Seismograf BD (NEW Eurorack Bass Drum module, free US shipping)

Price$149
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from Waunakee, WI

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Shipped From
Madisynths
Waunakee, WI, United States
(347)
Sales
400+
Joined Reverb
2017

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Seller notes:
Madisynths is now an official Frequency Central dealer. I stand behind these fantastic modules as a long time user, with about half of my personal rack consisting of FC synth gear!

About the Seismograf BD:
Seismograf is a PIC based drum module featuring coding by Jetroid. There is currently a choice of two PICs which may be used with Seismograf, ‘BD‘ and ‘SD‘. As you might expect, BD contains a range of 8 bass drums, while SD contains a range 8 of snare drums. The drum sounds are 10 bit encodings of some of our favourite electronic kits from yesteryear (see chart below). It is not possible for the user to load their own sounds onto Seismograf PICs, but there is a chance that we may release alternative drum sets as the years roll (!) by. BD SDSound 1 808 808Sound 2 808 808Sound 3 909  909Sound 4 SDSV SDSVSound 5 LM1 LM1Sound 6 DMX DMXSound 7 CR78 CR78Sound 8 DRUMTRAKS DR55

Select: This knob is used to select one of the 8 sounds to be triggered. It has a CV input associated with it, and when a jack is inserted into the CV input, the knob is used to attenuate the incoming control voltage. This CV input responds to 0V to 5V signals.

Tune: This knob may be used to detune the drum sound either upwards or downwards. It has a CV input associated with it, and when a jack is inserted into the CV input, the knob is used to attenuate the incoming control voltage. This CV input responds to 0V to 5V signals.

Distort: This knob may be used to introduce either one of two different types of distortion to your chosen drum sound. When set to the mid position (12 o’clock) no distortion is present. Turning the knob anti-clockwise will cause the sound to be progressively clipped harder, while turning the knob clockwise will cause the sound to be progressively more bitcrushed. This knob has a CV input associated with it, and when a jack is inserted into the CV input, the knob is used to attenuate the incoming control voltage. This CV input responds to 0V to 5V signals.

Secret Sauce: Try running the sawtooth output of an audio rate VCO into Seismograf’s trigger input, then wiggle the Tune knob manually, or apply a control voltage to the Tune input. Wow! What’s happening here then? When I first demo’ed this feature to Jetroid he buffered for a few minutes before performing a cold shutdown, unable to process what was happening to his code. Seismograf is acting kinda like a fliter, right? Well maybe! Probably more akin to oscillator sync really. As the incoming trigger is so fast, Seismograf only gets to play the initial part of it’s waveform, less on high notes, more on low notes. Additionally, there is naturally higher frequency content the higher the note and so forth. Whatever’s going on, we’re sure that you’ll agree that it sounds freaking awesome. More than just a drum module, right?

Product specifications:
  • Depth      35 mm
  • Width       4 HP
  • 12V draw   30 mA
  • -12V draw   2 mA
  • 5V draw    0 mA

Shipping notes:
Will be shipped promptly, within 24 hours of payment (Friday night/weekend sales will be taken to the shipper early on Monday mornings), with fast 2-day shipping available as an upgrade option. If you are in the Madison, WI area, a showing can be arranged, and free local pickup is available. In-person cash payment can be arranged to avoid the payment processing fees, but not the Reverb site fees (those will be reported and the 5% paid to Reverb).

For small and some medium items, the item will be bubble wrapped and well secured in a strong box. For some medium items (sizable drum machines, table top synths) and all large items (keyboards and rack mount devices), item will be double-wrapped and double boxed.

NOTE: I will combine shipping for parts and small items, and often have more in-stock than what is listed (especially replacement keys). Please message me your requirements for multiple parts needed, and I will adjust shipping and/or bulk discounts accordingly.

I stand by the items that I sell with Reverb's standard used/vintage gear return policy (within 7 days of delivery, buyer pays return shipping and to shipping on free items) unless otherwise noted (usually only for specific listings designated “for parts” or "non-functioning” equipment).

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