Buchla have teamed up with TipTop Audio to bring you eurorack compatible versions of Don Buchla's 200 Series modules. Featuring two independent voltage-controlled oscillators the 258t in 18hp features each with one processing input, a frequency modulation input and a 1V/oct input. Waveshapes, as well as frequency, can be voltage controlled. Model 258 oscillators feature low sine wave harmonic content, negligible settling error, and high short and long-term stability, even with rapidly changing ambient temperatures. There are three trimmers used to adjust the sine wave purity for each oscillator on the back of the module. 1V/oct is the octave tracking trimmer and is set at the factory using high precision instruments. SHAPE is the trimmer that set the sine wave, for the lower harmonic content of the sine wave. VC WAVE SHAPE sets the response of the waveshaper to the incoming control voltage. Both SHAPE and VC WAVE SHAPE. Video: https://youtu.be/IiLMU-f2Em4Product Specs Item Number: 21915 Make: Tiptop Audio Model: Model 258t Condition: Brand New Finish: Silver Categories: keyboards-and-synths ⇒ eurorack Function: Dual/Stereo Oscillator Made In: Thailand MPN: TTA-258 EAN: 8859469914012 Modular Grid: Eurorack ⓘ + Dimensions*: 18 HP 45 mm deep Power*: 70 mA +12V 40 mA -12V 0 mA 5V * User contributed details