Cwejman BLD bass and drum module


The BLD has all components and functions necessary for generating bass, lead and drum sounds but with focus on bass drum sounds. The BLD contains a main sound generator (Oscillator), a noise generator and modifiers such as low pass filter, amplifier and two transient (contour) generators.

We currently do not accept pre-orders for Cwejman products. If you are interested in this module, please use the availability notification. The number of Cwejman circuits is limited. Therefore, we recommend you to order online IMMEDIATELY when a module becomes available. Enquiries via e-mail or telephone are usually not fast enough. (More detailed information can be found on the product page.)



The oscillator has two manual pitch controllers (FINE, COARSE) and two inputs for controlling the pitch by external signals: FM1 (levelled, bipolar pre-patched to transient generator AR) and FM2 (calibrated to 1 Volt/octave). Waveforms and mix between shapes is controlled manually from triangle, mix between triangle and pulse, pulse, mix between pulse and saw tooth and saw tooth). Oscillator level is controlled manually from 0 thru nominal signal strength to saturated (curved, for more punch). Pulse width is controlled manually and by an external signal (PWM).

The Low Pass Filter has two audio inputs marked OSCILLATOR LEVEL and NOISE LEVEL, The CUTOFF frequency is controlled manually, by transient generators AR and AHR and by CUTOFF pre-patched to FM2 CV input.

The Noise Generator connected to the low pass filter and to the amplifier (NOISE LEVEL). It can be routed in to the amplifier (PRE) or directly to the output AMP (POST). The noise generators level is also controlled by pre-patched AR generator thru input NOISE LEVEL.

The AR and AHR transient generators are activated manually by the push button TRIG and/or by an external signal(input TRIG).
Attack, Hold and Release are manually controlled and by an external signals connected to inputs A1, R1 (AR) and A1, HOLD and R2 (AHR).

AMPLIFIERs gain is controlled by mix of AR and AHR and by an external signal connected to the input VELOCITY.


We currently do not accept pre-orders for Cwejman modules. For some products, there are waiting lists with pre-orders from the years 2013 to 2017, which are being processed as a matter of priority.
If you’d like to be informed as soon as this module is back in stock, please activate the availability notification via e-mail.
Please note: The number of Cwejman modules is always limited and much lower than the number of interested parties. Therefore, we recommend to order IMMEDIATELY and ONLINE if a Cwejman product becomes available. Enquiries via e-mail or telephone are usually not fast enough.
If the demand is higher than the supply, unfulfillable pre-orders will be deleted. In this case you’ll receive an e-mail. (Pre-orders on the waiting lists mentioned above are excluded from this policy.)


Inputs: Trigger, Sync. 2x FM-CV input, Noise Level. CV inputs for envelopes: Attack1, Release1, Attack 2, Hold 2, Release 2. Velocity level

Outputs: AMP (main audio output), LPF (direct output from the filter), AR and AHR (transient generator outputs)


3U Eurorack module, 24HP wide, 25mm deep
Current draw: 60mA

0.5 kg
Article Number
This product cannot be reserved. Please use the email notification.
€ 19% VAT excl. €571.43 € 19% VAT incl. €680.00
Excl. 19% VAT, Excl. shippingLieferzeit 1