via this auction
"Audio Mixer w/ phase switch (3x1) (AMX)The Audio Mixer is a three-in/one-out manual mixer with a phase switch on input 3.
Variable Q VCF (VCFQ)
The VARIABLE Q VCF (VCFQ) is an excellent general-purpose VCF offering simultaneous low-pass, high-pass, band-pass and notch (band-reject) outputs.The resonance (Q) of this filter is dynamically variable by manual or voltage control. The VCF Q has two signal inputs. One incorporates an automatic gain control to prevent the filter from overloading at high Q settings. The second input has a level control so that the percussive effects of overloading the filter can be exploited. When a pulse is applied to the Trigger input, the filter will ring, producing a damped waveform similar to that produced by striking a resonant object. The nature of this ringing is controlled by the Q and the filter frequency. Percussive effects ranging from clicks to the soundof wood blocks and bell tones can be produced and controlled. This ringing effect can be used in conjunction with signals applied to either of the audio inputs to achieve highly controlled complex tonal qualities.
Other comments:
A nice bit of flexibility is the "LO" setting that turns it into a CV processor! ... Recent updates to the filter's circuitry are noticeable as well- Its much easier to get tube-type harmonic warmth just by nudging the gain control. The feedback and overdrive characteristics have also been tweaked to be more musically useful... This filter will not oscillate unless you patch it up for feedback... Hi-Lo range switch for fantastic and unique audio/cv applications - hit it with a pulse, get an unbelievably slow damped sine wave.Calibrated 1 v/oct and attenuated cv inputs, just like the oscillators... Since it's a multi-mode filter, it's 12 dB/oct roll-off. You may want a LPF with more 'bite' in some applications. I think the bandpass and all pass sections of this filter have 6 dB/oct roll-off.
