Robertsonics designs high performance embedded audio players and processors, used worldwide by professionals and hobbyists alike.

  • MP3Trigger_250

    MP3 Trigger

    Keep things simple. 18 trigger inputs connect to your contact closures to fire specific MP3 Tracks (up to 192kbps stereo) on a microSD card, or to implement transport functions like next, previous, stop, random play, volume etc. Simple, ASCII-based serial protocol makes it easy to control from an Arduino. Text init file allows setting the serial baud rate and alternate trigger functions. Special trigger modes allow simple logic without the need for an external microcontroller. Firmware upgradable.

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    Carina is the only Blackfin development board designed from the ground up for audio. Everything you need for a professional stereo effects processor. Sporting a 400MHz Blackfin, 256MB of external SDRAM, balanced stereo inputs and outputs, 24-bit ADC/DAC >98dB SNR, and sample rates up to 96KHz. A 26-pin IDC connector provides plenty of general purpose I/O for user interface controls. A “plug-in” style software framework for VisualDSP lets you immediately focus on algorithm development.

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  • New_250

    WAV Trigger

    For professional and demanding applications. The worlds least expensive truly polyphonic embedded audio player – allowing you to play and layer up to 14 CD quality (16-bit, 44.1kHz, stereo) tracks independently. Additional trigger modes and settings provide pause and resume capability, specify track ranges for stop, random and sequential play. Trigger inputs support passive (contact closure) or active (3.3V / 5.0V logic) as well as inverted modes on an individual basis. MIDI serial option provides velocity-sensitive triggering of up to 999 tracks. Stereo line-level output, on-board 2W mono amplifier and speaker connector for true single-board operation. Low-power sleep mode for battery operation. Firmware upgradable.

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Latest Blog Post


WAV Trigger firmware version 1.06 adds variable sample rate conversion on the main output. This comes in the form of MIDI Pitch Bend support and a new serial control protocol message.

By default, in MIDI mode, MIDI Pitch Bend (any channel) raises and lowers the pitch of the WAV Trigger’s main output mix by plus and minus 2 semitones. The latest version of the InitMaker app allows for changing the pitch bend range to from 1 to 5 semitones using a new #BEND command in the init file.

There’s also a new samplerateOffset serial command that allows for adjusting the output sample rate between 1/2x to 2x with 16-bit resolution – while audio is playing. Documentation for this message has been added to the Online User Manual and the latest version of the Remote Control demonstration app adds a sample rate control knob to demonstrate this. I’ll add support for this feature to the Arduino Serial Control Library shortly.

The new firmware and update related apps are all on the download page.