The 291e Triple Morphing Filter comprises three voltage-controlled bandpass filters that can operate independently or in parallel.
The amplitude, center frequency, and bandwidth of each filter may be independently voltage-controlled, and each can be modulated with externally applied signals.
The morphing capability might best be described as moving through a series of filter snapshots, with each snapshot consisting of a complete description of the filter parameters, and with each parameter continuously varying between snapshots. Morphing is accomplished with an applied voltage, or alternatively can be initiated with a pulse, with each stage’s time independently set. Up to eight stages may be employed.
All of the 291e’s settings can be stored and recalled using the 225e or 206e Preset Manager.
Other modules by Buchla | 206e Mixer / Preset Manager | 207e Mixer / Microphone Preamplifier | 210e Control and Signal Router | 223e Multi-Dimensional Kinesthetic Input / Tactile Input Port | 225e MIDI Decoder / Preset Manager | 227e System Interface | 230e Triple Envelope Tracker / Preamplifier | 250e Arbitrary Function Generator | 251e Quad Sequential Voltage Source | 252e Buchla Polyphonic Rythm Generator | 256e Quad Control Voltage Processor | 266e Source of Uncertainty | 257e Control Voltage Processor | 267e Uncertainty Source / Dual Filter | 261e Complex Waveform Generator | 259e Twisted Waveform Generator | 272e Polyphonic Tuner | 266e Source of Uncertainty | 281e Quad Function Generator | 285e Frequency Shifter / Balanced Modulator | 292e Quad Dynamics Manager | 296e Spectral Processor | 297 Infinite Phase Shifter