scope

scope · utilities · schema v1

2-channel passthrough oscilloscope. Inputs flow unchanged to outputs while an AnalyserNode samples for display.

A two-channel oscilloscope for SEEING your signals — it passes audio straight through untouched while drawing the waveform on an on-card screen, so you can patch it inline as a probe without altering the sound. Each channel has its own vertical SCALE, Y OFFSET, and RANGE mode (bipolar audio ±1 or unipolar CV), and a shared TIME knob sets how wide a window of the waveform fills the screen. An XY mode plots channel 1 against channel 2 (Lissajous figures, stereo phase) instead of two stacked traces, and an INTENSITY knob adds phosphor-style persistence from a single moving dot up to a glowing trail. Because it visualizes anything, the signal inputs also accept CV, pitch, and gate cables (not just audio). Every knob has a matching CV input, and the whole trace is also exported as a video output you can patch into the video domain. Display-only — none of the controls touch the audio path.

the faceplate

11 inputs · 3 outputs · 9 params

about this module

Hover a control, or open the patch panel and hover a jack.

inputs

id	cable	what it does
`ch1`	audio	Channel-1 probe: the signal drawn on the upper trace (or the X axis in XY mode), and passed through cleanly to CH1 OUT. Typed audio but also accepts CV, pitch, and gate so you can scope LFOs, envelopes, pitch CV, and gates. audio signal; also accepts: control voltage (CV), V/oct pitch CV, gate / trigger
`ch2`	audio	Channel-2 probe: the lower trace (or the Y axis in XY mode), passed through to CH2 OUT. Also accepts CV/pitch/gate. audio signal; also accepts: control voltage (CV), V/oct pitch CV, gate / trigger
`timeMs`	cv	CV that modulates the TIME timebase knob — sweep how much of the waveform fits on screen. control voltage (CV); modulates timeMs (summed directly (the destination DSP scales it))
`ch1Scale`	cv	CV that modulates channel 1's vertical SCALE — zoom the trace's amplitude in or out. control voltage (CV); modulates ch1Scale (summed directly (the destination DSP scales it))
`ch1Offset`	cv	CV that modulates channel 1's Y OFFSET — slide the trace up or down on screen. control voltage (CV); modulates ch1Offset (summed directly (the destination DSP scales it))
`ch1Range`	cv	CV that modulates channel 1's RANGE mode (≥ 0.5 toggles bipolar↔unipolar display scaling). control voltage (CV); modulates ch1Range (summed directly (the destination DSP scales it))
`ch2Scale`	cv	CV that modulates channel 2's vertical SCALE. control voltage (CV); modulates ch2Scale (summed directly (the destination DSP scales it))
`ch2Offset`	cv	CV that modulates channel 2's Y OFFSET. control voltage (CV); modulates ch2Offset (summed directly (the destination DSP scales it))
`ch2Range`	cv	CV that modulates channel 2's RANGE mode. control voltage (CV); modulates ch2Range (summed directly (the destination DSP scales it))
`mode`	cv	CV that toggles the display MODE (≥ 0.5 switches into XY plot, below stays time-domain) — e.g. a gate can flip the scope into XY view. control voltage (CV); modulates mode (summed directly (the destination DSP scales it))
`intensity`	cv	CV that modulates the beam INTENSITY / persistence. control voltage (CV); modulates intensity (summed directly (the destination DSP scales it))

outputs

id	cable	what it does
`ch1_out`	audio	Clean passthrough of the channel-1 input — the scope adds no processing, so you can chain it inline. audio signal
`ch2_out`	audio	Clean passthrough of the channel-2 input. audio signal
`out`	mono-video	A video output carrying the same waveform image the on-card screen shows — patch it into the video domain (OUTPUT, a video mixer) to put the trace on screen. mono video stream

params

id	label	range	default	curve
`timeMs`	Time	1..200ms	20	log
`ch1Scale`	Ch1 Sc	0.1..10	1	log
`ch1Offset`	Ch1 Y	-1..1	0	linear
`ch1Range`	Ch1 R	0..1	0	discrete
`ch2Scale`	Ch2 Sc	0.1..10	1	log
`ch2Offset`	Ch2 Y	-1..1	0	linear
`ch2Range`	Ch2 R	0..1	0	discrete
`mode`	XY	0..1	0	discrete
`intensity`	Inten	0..1	0.5	linear

controls

control	what it does
Ch1 Y	Channel-1 vertical position (-1 to +1, default 0): nudges the trace up or down so two channels don't overlap.
Ch1 R	Channel-1 display range: 0 = bipolar (±1, audio convention), 1 = unipolar/CV (±5 scaling) so a multi-octave pitch CV sweep is readable without re-zooming.
Ch1 Sc	Channel-1 vertical zoom (0.1× to 10×, log, default 1): magnifies a quiet signal or shrinks a loud one to fit the screen.
Ch2 Y	Channel-2 vertical position (-1 to +1, default 0).
Ch2 R	Channel-2 display range: 0 = bipolar audio, 1 = unipolar/CV.
Ch2 Sc	Channel-2 vertical zoom (0.1× to 10×, log, default 1).
Inten	Phosphor beam persistence (0 to 1, default 0.5): at 0 the trace is a single moving dot, at 0.5 a full-brightness single-screen trace, toward 1 a ~2-screen glowing persistence trail. Visual feel only.
XY	Display mode: 0 = two stacked time-domain traces, 1 = XY (channel 1 vs channel 2 — Lissajous / stereo phase plot).
Time	The time window drawn across the screen width (1 to 200 ms, log, default 20): smaller values zoom in on a few cycles, larger values show a longer slice. The TIME CV input modulates this.

source

scope.ts on GitHub.