Korg keyboards for versatile music production at home​ TipTop Audio Buchla Model 258t Dual Oscillator Eurorack Module (18 HP)

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TipTop Audio 258T Overview

Generate complex waveforms with the Tiptop Audio Buchla 258t Dual Oscillator, with two independent voltage-controlled oscillators, a processing input, a frequency modulation input, and a 1V/oct input. Waveshapes and frequency can be voltage controlled. Model 258t oscillators feature low sinewave harmonic content, negligible settling error, and high short and long-term stability, even with rapidly changing ambient temperatures. The module ships with a ribbon power cable.

Trimmers
There are four trimmers 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 sinewave.
  • VC WAVE SHAPE sets the response of the waveshaper to the incoming control voltage. Both SHAPE and VC WAVE SHAPE trimmers are used to adjust sinewave purity.
  • From version V1.2 two more trimmers were added. VPP1 and VPP2 are used to set the waveshape amplitude.
Eurorack Ready
  • 18 HP Eurorack format module
  • Maximum depth: 1.8" (45mm)
  • Includes power ribbon cable with Eurorack power headers
  • Power consumption: +12V: 70mA, -12V: 40mA

In the Box

  • TipTop Audio Buchla Model 258t Dual Oscillator Eurorack Module (18 HP)
  • Ribbon Power Cable
  • Limited 1-Year Manufacturer Warranty

    TipTop Audio 258T Specs

    Key Specs
    Sound Generation
    Analog
    Audio I/O
    4x 1/8" / 3.5 mm Output
    MIDI I/O
    No
    CV/Gate I/O
    8x 1/8" / 3.5 mm CV Input
    Patch Points
    8x 1/8" / 3.5 mm Input
    4x 1/8" / 3.5 mm Output
    Eurorack Current Consumption
    70 mA on +12 V Rail
    40 mA on -12 V Rail
    Horizontal Pitch
    18 HP
    General
    Item Type
    Eurorack Module
    Sound Generation
    Analog
    Expression Controls
    No
    Number of Pads
    No
    Built-In Effects
    No
    Performance Functions
    No
    Built-In Speaker
    No
    Synthesis
    Oscillators
    2x Variable (FM, Sawtooth, Sine, Square)
    Mixer
    No
    Amplifiers
    No
    Envelopes
    No
    Filters
    No
    LFOs
    No
    Sequencing & Recording
    Sequencer
    No
    Arpeggiator
    No
    Connectivity
    Audio I/O
    4x 1/8" / 3.5 mm Output
    MIDI I/O
    No
    CV/Gate I/O
    8x 1/8" / 3.5 mm CV Input
    Control Voltage Level
    CV In: +12 V (1 V/Octave)
    Patch Points
    8x 1/8" / 3.5 mm Input
    4x 1/8" / 3.5 mm Output
    Sync I/O
    No
    Media/Memory Card Slot
    No
    Audio Performance
    Frequency Response
    5 Hz to 20 kHz
    Power
    Power Requirements
    Eurorack Power
    Eurorack Current Consumption
    70 mA on +12 V Rail
    40 mA on -12 V Rail
    Physical
    Horizontal Pitch
    18 HP
    Included Accessories
    No
    Packaging Info
    Package Weight
    0.745 lb
    Box Dimensions (LxWxH)
    6 x 4.7 x 3"

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