Module A-124-2 is the slim version of the Wasp filter module A-124.

The main difference compared to the A-124 are the small controls for Mix and Input Level, and the lowpass or highpass signal is available at a separate socket. A jumper is used to determine if lowpass or highpass appears at the socket.

All other features are the same as the A-124.

• Width: 4HP
• Power: +30mA @ +12V / -10mA @ -12V

Features:

• Three Filtered Noise Outputs – Simultaneous access to +3dB (blue), -3dB (red/brown), and flat (pink) digital noise types for versatile modulation sources.
• Adjustable Noisy Triangle Oscillator – User-controllable frequency (~110 Hz to 5 sec period) and "noisiness" level; outputs a variable noise-modulated triangle wave.
• Flexible Sample & Hold (S&H) Section – Internal triangle wave normalled to S&H input with clock selectable between manual or slew-controlled automatic timing.
• S&H Correlation Control – Feedback blending of S&H output with input creates gradual transitions, acting like a digital slew or smoothing filter.
• Dual-Mode Clock Control – S&H clock frequency can be set manually or modulated automatically by the slew limiter’s vactrol-controlled timing.
• Slew Limiter with Vactrols – Dual-vactrol-based slew circuit allows both manual and CV control for smooth voltage transitions; a third vactrol links to the S&H clock in auto mode.
• Modular Normalling for Submodules – Internal routing (normalled sockets) allows independent use of each sub-unit: noise, triangle, S&H, and slew limiter.
• Comprehensive Signal Access – All major internal signals (e.g., noisy triangle, clock, S&H in/out, SL in/out) are available at front panel sockets.
• Visual Feedback via LEDs – Dual-color LEDs indicate polarity and activity for triangle, clock, S&H, and slew outputs for intuitive monitoring.
• Expanded Functionality Beyond Original Buchla 265/266 – Adds manual controls, CV modulation, selectable noise sources, and broader routing not found in the original design.