Product comparison tables

On this page we present two tables which compare our product lines in terms of technical specifications and performance.

Table of contents

  1. Audio boards
  2. Trill sensors

Audio boards

We now offer a number of different audio boards which each have their benefits depending on what you would like to achieve in your project. The below table helps you navigate the different boards we offer by comparing their specifications, including when base boards are used in combination with expanders.

Board name Audio I/O Analog I/O Digital I/O High quality audio Minimum roundtrip audio latency Dimensions
Bela 2 in, 2 out (44.1kHz, 16-bit) 8 inputs, 8 outputs 16 yes < 1ms 54 x 88 x 28 mm
Bela + Audio Expander Capelet Adds 4 I/O at 44.1kHz, or 8 at 22.05kHz to the stereo I/O of the Bela See below* 16 yes (2) no (up to 8) < 200┬Ás with expander channels 54 x 88 x 43 mm
Bela + Multiplexer Capelet 2 in, 2 out (44.1kHz, 16-bit) 64 inputs, 8 outputs** 16 yes < 1ms 54 x 88 x 43 mm
Bela Mini 2 in, 2 out (44.1kHz, 16-bit) 8 inputs 16 yes < 1ms 35 x 64 x 34 mm
Bela Mini + Multichannel Expander 8 in, 8 out (44.1kHz, 16-bit) 8 inputs 16 yes < 1ms 35 x 64 x 34 mm
CTAG FACE 4 in, 8 out (48kHz, 16-bit) 0 16 yes < 1ms 54 x 88 x 28 mm
CTAG FACE + Bela Cape 4 in, 8 out (48kHz, 16-bit) 8 inputs, 8 outputs 16 yes < 1ms 54 x 88 x 43 mm
CTAG BEAST 8 in, 16 out (48kHz, 16-bit) 0 16 yes < 1ms 54 x 88 x 43 mm
CTAG BEAST + Bela Cape 8 in, 16 out (48kHz, 16-bit) 8 inputs, 8 outputs 16 yes < 1ms 54 x 88 x 72 mm

* When using the audio capelet the extra audio channels are at the expense of the analog channels. 10x gain is configurable via jumpers on the board.

** 64 channels at 2.75kHz, 32 channels at 5.5kHz or 16 channels at 11kHz.

Trill sensors

Trill is a family of touch sensors that comes in a variety of different shapes and with different capabilities. The below table summarises and compares the functionality of the different sensors.

Sensor name Sensing Mode Multitouch Dimensions
Bar 1-axis slider Yes 101 x 22mm
Ring 1-axis slider Yes 52mm (outer diameter); 28mm (inner diameter)
Square 2-axis pad No* 69 x 69mm
Hex 2-axis pad No* 46.5 (edge to edge); 52mm (corner to corner)
Craft** 30-channel breakout Yes 52 x 21mm
Flex*** 1-axis slider (included) Yes Sensor dimensions: 117 x 22mm

* Pseudo-multi-touch is possible on these sensors but due to the matrix arrangement of pads it is not possible to reliably track the position of individual touches when there is more than one present.

** Trill Craft is a 30-channel breakout board for creating custom touch interfaces out of any conductive material.

*** Trill Flex comes with a single-axis, multi-touch sensor printed on flex PCB. Since the sensor is detachable you can create your own sensors for use with Trill Flex. See the tutorial at