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SamplerBox 1

Raspberry Pi Based Hardware Sampler / Synth Platform

iam
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SamplerBox 1 is a hardware sampler/synth based on Raspberry Pi.

It features MIDI DIN input port, display and control buttons, studio grade audio interface with balanced TRS line outputs and a headphone amplifier onboard. All regular RPi ports remain usable as well.

The hardware platform is designed to run SamplerBox, an amazing open source/open hardware sampler that combines features top-of-the range PC samplers, including 1GB sampler bank support and 128 voice polyphony with hardware capabilities, offering ultra-low latency, 9s startup time and USB drop'n'play.

Goal of this project is to produce best hardware sampler on the market, and share the hardware platform with makers looking to build own synth, sampler or filter.

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Heart of the SamplerBox 1 is a single PCB that plugs into Raspberry Pi GPIO connector and carries all peripherals a sampler needs onboard, including Hi-Fi I2S DAC, headphone amplifier, MIDI ports, display and controls. (See component list for full specs.)

The PCB is designed to fit stylish custom-machined off-the-shelf aluminium enclosure.

  • 1 × PCM5122 112db SNR I2S Audio DAC
  • 1 × TPA6133A2 High Fidelity Headphone Amplifier
  • 1 × Stereo 1/4" TRS Output Can be connected to balanced or unbalanced inputs
  • 1 × 1/4" Headphones Output
  • 1 × Headphone Volume Knob
  • 1 × MIDI IN/THRU Ports Using standard DIN connectors
  • 2 × Patch Change Buttons
  • 1 × 16x2 LED Display
  • 1 × GPIO Pin Header For DIY extensions
  • 1 × MicroUSB 2A power input

  • Fully Working Sampler Board

    iam02/07/2017 at 15:49 0 comments

    A year ago I set off on a journey to create a custom board that would be designed to run SamplerBox - the best open-source sampler available.

    And the great news are, this is now done. I've designed and manufactured a board that connects to Raspberry Pi and provides necessary audio interfaces: MIDI IN/THRU, onboard DAC, balanced line outputs, headphone amp, display and control buttons.

    Read more »

  • PCB Assembly and Testing

    iam02/03/2017 at 05:23 0 comments

    The sampler board assembled and after adding a couple of minor mods DAC is fully functional, as well as program change buttons.

    Read more »

  • Prototype PCBs Ready

    iam04/20/2016 at 00:03 0 comments

    SamplerBox 1 PCBs have been manufactured and it is now ready for assembly and testing. This prototype board is designed to host a Raspberry Pi board, providing MIDI interface, I2S DAC, line outputs and a headphone amplifier. Two GPIO buttons and 16x2 LCD display are placed on the opposite side of the board.

  • Prototype PCB testing is complete

    iam02/23/2016 at 13:48 5 comments

    Prototype PCB testing is complete at this point and it is being prepared for manufacturing.

    The current design is a 11x11cm PCB that holds all required peripherals and plugs into Raspberry PI GPIO socket, eliminating the need for any wiring as DAC, all peripherals and connections are placed onto one board. It is designed to fit stylish aluminium off-the-shelf 12x12x4 cm enclosure.

    A concept drawing.

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