Key data
Topographic drum sequencer
| Parameter | Value |
|---|---|
| Width | 16HP |
| Depth | 25mm |
| +12V current | 25mA |
| -12V current | 1mA |
| Lifetime | 08/13 to 03/21 |
| Modulargrid | Link |
| Processor | ATMega328p @ 20 MHz |
Original printed manual
Settings reference card
Features
Clocking
- Internal clock with a 40 to 240 BPM range.
- Beat indicator / Tap tempo button (reconfigurable as a reset button).
- External clock input, with selectable resolution (24, 8 or 4 ppqn).
- Pattern reset trigger input.
Drum pattern generator
Based on a compressed representations of drum patterns and their variations.
- X/Y (pattern selection) knobs with CV inputs.
- Pattern complexity/density knobs for channels 1, 2, 3, with CV inputs.
- Pattern randomization knob with CV input (reconfigurable as a swing control for the internal clock).
- 3 output channels (BD, SD, and HH/percussion).
- 3 additional outputs, configurable as Accent/Clock/Reset or per-channel accent.
- Outputs can be either triggers or gates.
Specifications
- Input impedances: 100k.
- CV acquisition: 8-bit, 1kHz.
- Output level: +5V.
- Clock resolution and processing latency: 120µs.
- Worst case jitter < 0.5% at 120 BPM.
Revisions and variants
2014
Hardware revision labelled "v0.2" with the following differences:
- 2x5 power connector (originally 2x8).
- Built-in 5V regulator.
- Milky, diffused LEDs (originally clear).