Notes: Introducing the BD808, part of our new series of drum modules that brings analog percussion into the modular synth world, instantly turning your system into a self-contained music machine. Its small size, minimalist design, and modern production methods have allowed us to bring the world's most famous bass drum sound generator back at a very low cost. The real thing is here again.
The BD808 is the Roland TR-808's Bass Drum circuit adapted for use in Eurorack format and tuned to sound like a machine that comes fresh off the original 80's assembly line. The adaptation to modular format has allowed us to add some special features like independent Accent levels, a high-powered gain stage, dual-input pulse-shaper, and extended decay - all without compromising the signature sound of the TR-808.
A widely used technique with TR-808 machines is to run the drum sounds through outboard amplifiers to add gain and then pass the sound through just about anything to generate additional harmonics caused by clipping and distortion. In the BD808, we have already included this high-powered output gain stage capable of producing signals up to 20Vpp, extending from the original palette of sounds and allowing you to get an assorted array of harmonized bass drums ranging from sharp attacks to crushed tones using this simple yet effective technique! On the inputs, we have also designed a dual pulse-shaper circuit so you can trigger your BD808 with Trigger/Gate signals from step sequencers, clock dividers, or any other pulse/clock sources. This saves you the need to shape the pulses sent to the module and ensuring the same stable sound at its peak power, regardless of differences in your pulse source.
All these little, but unique, features make integrating this legendary sound generator into your modular easy, unleashing the power of real analog drums and making those speaker cones shake.
Percussion synthesiser module version of the original TR-909 clap sound - 4HP wide
Notes: The CP909 is the TR-909 clap sound analog generator in Eurorack format. This is yet another low-cost analog drum generator from a legendary drum machine in your modular synthesizer, expanding your Tiptop Audio modular drum machine even further.
The CP909 is an exact reproduction of the original analog circuit and, with the addition of just one extra knob, "trashing" the frequency of the internal noise generator, we have added greatly to the spectrum of sounds that can be generated - all that without compromising the signature sound of the TR-909 clap.
The CP909 clap effect is made by a special triple-saw envelope generator that controls the gain of a VCA. The sound source feeding into the VCA is made by a quasi-random logic based noise generator; some might call it "digital noise" though this term might be misleading in today's world of microcontrollers and sound samples. What really makes the noise generator is a ring of logic gates, so primitive, so BO's, and that's the sound of the 909 Clap!
The CP909 includes a high-powered output gain stage capable of producing hot signals. On the inputs, we have designed a pulse-shaper circuit so you can trigger the CP909 with trigger/gate signals from step sequencers, clock dividers, or any other pulse/clock sources. This eliminates the need to shape pulses sent to the module and ensures the same stable sound at peak power, regardless of your pulse source. Based on the architecture of the 909, the Accent input is versatile and able to take in both CV and Gate signals for continuously changing dynamics. All these unique features make integrating this legendary sound generator into your modular synth easy, unleashing the power of real analog drums.
Snare drum module made from the TR808's circuit adapted for Eurorack use - 4HP wide
Notes: Introducing the SD808, part of our new series of drum modules that brings analog percussion to the modular synth world, instantly turning your system into a self-contained music machine.
The SD808 is the TR-808's analog snare drum circuit adapted for use in Eurorack modular synthesizer format and was designed to sound like a fresh-out-of-the-box, 1980s TR-808 snare. Adapting the circuit to the modular format has allowed us to add special features like independent accent levels, a high-powered gain stage, a dual-input pulse-shaper, and an adjustable noise source - all without compromising the signature sound of the TR-808 snare drum.
The SD808 sounds tight and extremely snappy because it's analog - the real thing, not samples. The sound is made with three analog sound generators mixed together: two oscillating sine waves and a noise source. The SD808's front panel controls have a lot of sweet spots with sounds that are not just limited to snare drum sounds; it can also create other electronic percussive elements.
The noise source generator in the original TR-808 machines were revised in later production batches, resulting in variations in sound across the production run. The SD808 uses this later, revised circuit to create a snare drum hit that is slightly darker, has more body, and is more realistic. Just like other drums in this series, the SD808 includes a high-powered output gain stage capable of producing signals up to 20Vpp, allowing you to get an array of harmonized snare drums sounds with even tighter attacks. On the inputs, we have designed a dual-input pulse-shaper circuit so you can trigger the SD808 with Trigger/Gate signals from step sequencers, clock dividers, or any other pulse/clock sources. This eliminates the need to shape pulses sent to the module and ensures the same stable sound at peak power, regardless of your pulse source. All these unique features make integrating this legendary sound generator into your modular synth easy, unleashing the power of real analog drums.
Notes: The Tiptop Audio VCA is a full featured, precision calibrated, analogue Voltage Controlled Amplifier. At its heart is a novel design of a control circuitry - a function that lets you sweep continuously through three different response curves: Logarithmic, Linear, Exponential - giving you all three shapes in a single module. This special control circuitry design by Mr. Osamu Hoshuyama was adopted into the VCA module to make it a great sounding synthesizer VCA with flexibility to address all duties: level control for both audio and CV modulation, gating audio into silence, and amplitude modulation effects.
A VCA, Voltage Controlled Amplifier, sometimes referred to as an audio gate, is an essential module to any Eurorack and no system is complete without one. The concept is an input, an output and a control that sets how much of the input signal passes through to the output.
A great VCA means minimum feedthrough of the control signal bleeding into the passing signal and minimum distortion applied to the passing signal. An excellent audio gate means minimal leakage of signal from IN to OUT when the control tells the VCA to fully close. These are the most critical conditions for a good sounding, good responding VCA and are what the Tiptop Audio design carefully addresses. 2 LED peak indicator lights on the front panel light up with incoming CV or audio signals. While a clipping indicator for audio is expected, clipping of CV is often overlooked and it's included here to visually maintain the full dynamic range of an envelope driving the VCA.
The Tiptop Audio VCA lets you concentrate on creative uses rather than figuring out the module's anomalies. The result is an excellent sounding synthesizer VCA that's a joy to use and pleasing to hear.