VM2500 Blank Panel Module 1001 VM2500 Dual Envelope Generator Module 1003 VM2500 Oscillator Module 1004-P VM2500 Oscillator Module 1004-R VM2500 Oscillator Module 1004-T VM2500 Modamp Module 1005 VM2500 Filtamp Module 1006 VM2500 Dual Noise/Random Voltage Generator Module 1016 VM2500 Oscilloscope Module 1019 VM2500 Dual Oscillator Module 1023 VM2500 Dual Reverberator Module 1025 VM2500 Preset Voltage Module 1026 VM2500 Clocked Sequential Control Module 1027 VM2500 Dual Envelope Generator Module 1033 VM2500 Sample & Hold Module 1036 VM2500 Triple VCA Module 1042 VM2500 Synthesizer Voice Module 1045 VM2500 Quad Envelope Generator Module 1046 VM2500 Multimode Filter Resonator Module 1047 VM2500 Mix-Sequencer Module 1050 VM2500 Dual Four-Channel Mixer Module 1051 VM901 Voltage Controlled Oscillator VM902 Amplifier VM903 Random Signal Generator VM905 Reverb VM907A Fixed Filter Bank VM911-A Dual Trigger Delay VM912 Envelope Follower VM921 Voltage Controlled Oscillator VM923 Filters/Noise VM927 Multiple VM958 Keyboard/VCO Interface VM960 Sequencer VM962 Sequential Switch VM984 Four-Channel Matrix Mixer VM995 Attenuators VM914 Fixed Filter Bank VM928 Sample Hold VM1630 Frequency Shifter VM901ABBB Voltage Controlled Oscillator VM904A/B/C Filters VM911 Envelope Generator VM921ABBB Oscillator Bank VM Rackmode 10 Band Graphic EQ VM Rackmode 12 Stage Phaser VM Rackmode 3 Band Parametric EQ VM Rackmode Poly Vocal Source Oscillator VM Rackmode Ring Modulator VM Rackmode String Filter VM Rackmode Vocal Source Oscillator VM Rackmode Frequency Shifter VM Rackmode 16 Channel Vocoder VM Miniverse A-440 VM Miniverse Contour VM Miniverse Filter VM Miniverse Glide VM Miniverse Mixer VM Miniverse Noise VM Miniverse Oscillator VM Miniverse Poly Contour VM Miniverse Poly Filter VM Miniverse Poly Glide VM Miniverse Poly Mixer VM Miniverse Poly Oscillator VM Miniverse Poly VCA VM Miniverse VCA

The VM928 is a sample and hold with an internal clock source and a glide section.

Below we've illustrated how a sample & hold works. In the image below, the smooth gray line shows a continuous input signal. Each time the module is triggered by an incoming clock signal, the current voltage is “sampled” and “held” until the next trigger. The red line shows the stepped output signal.

Inputs, Outputs, and Controls

Clock Rate- Sets the speed of the onboard clock from 0.3 to 30 Hz.

Trig In- Patch external trigger (i.e. clock) signals here when the Sampling switch is set to the Ext position.

Sample Int/Ext- Selects either VM928's internal clock or an external clock source. Typically you'd use a sequencer or clock module, but just about any module that outputs a waveform with a sharp leading edge can be used as a clock source.

Clock Out- Outputs the internal clock signal, either as a pulse or a triangle wave.

Glide- Smooths the stepped output of the sample and hold. Lower settings are faster, higher settings are slower.

Inputs / X1/X3- This is where sample sources are plugged in; each input has a different mod depth. The X1 input is about 1/4 volt up and down, and the X3 input is about 3/4 volt up and down.

Outs- Sample and hold outputs. Even though they appear to be related to the X1 and X3 outs, they aren't, they are just duplicate outputs.