STG Soundlabs Pulse Matrix For MU Modular Synthesizer


STG Soundlabs has introduced an updated version of its Pulse Matrix, a comparator and divider network configured for audio applications in MU format.

It’s designed so that it can be used independently as a comparator and suboctave generator, and it also can be connected directly to the STG Soundlabs Oscillator, so that the oscillator is normalized to the Pulse Matrix input.

Here’s what they have to way about it:

“Think of it as an elaborate version of the PWM and Suboctave of the SH-101. If you’re not familiar with the SH-101, think of it as a little box you can put any waveform into and get a pulse wave and 4 varieties of suboctave from.

The signal input is where you would put whatever you want to turn into a pulse wave into.

The threshold control sets the “flip” point of the comparator, and has a range of approximately negative five volts to positive five volts. think of it as a pulse width control.

The control input has a dedicated attenuator and is summed with the manual control, and allows for external modulation of the threshold point. Think of it as a pulse width modulation input.

Next are five outputs. They are all ten volt peak-to-peak signal to play nice with other audio modules. This is unlike the sh-101, where the suboctave had a dc offset which made its bass frequencies not as strong as they could have been.

    • The first is the direct output of the comparator. In “pulse width” terms this is zero to one hundred percent.
    • The second output is a 50 percent duty cycle wave one octave lower than the main output.
    • The third output is a variable output, from one to forty-nine percent duty cycle, one octave lower than the main output.
    • The fourth output is a 50 percent duty cycle wave two octaves lower than the main output.
    • The fifth output is a 25 percent duty cycle wave two octaves lower than the main output.

There is a rear panel header to connect to the STG Soundlabs Oscillator so the sawtooth wave is normaled to the input of the module. Cable is included.”

Pricing and Availability:

The Pulse Matrix is available to order for $250. STG says that there’s a lead time for orders of about 2 weeks.


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