pi-Stomp Core Hardware Specs:

  • Raspberry Pi 1.4 Ghz 64-bit quad-core processor
  • Dual ins/outs, 24-bit, 48 to 96kHz stereo audio (AudioInjector Zero, HiFiBerry, etc.)
  • Latency: 2.67ms (128 frames/96kHz).  5.33ms if CPU load is reduced by changing sample rate to 48kHz or frames to 256.
  • Buffered Input Impedance: 1 Meg Ohm
  • True bypass on In1/Out1 via latching relay
  • Stereo output Volume control
  • Encoder for navigation and control
  • Header to support most SPI based LCD/LED displays (recommended color TFT costs $14)
  • ADC with header for adding up to 8 Analog controls (pots, faders, expression pedal, switches, etc.)
  • Debounce with header for up to 5 momentary switches (footswitches, pushbutton, etc.)
  • UART header for serial communication or DIN MIDI In/Out (optional $12 module)
  • Header for 3 uncommitted GPIO pins for whatever (ins/outs, sensors, LED's, etc.)
  • USB MIDI support via Raspberry pi USB port
  • Small footprint!  Smallest system with color TFT LCD and two footswitches should fit in a Hammond 1590BBS enclosure: 119mm x 94 x 42 (4.7in x 3.7 x 1.66)
  • Low cost: Board + components + raspberry pi + audio card + color TFT LCD should cost less than $120.  Add two footswitches, a power supply and (bare) enclosure, and the cost would be around $150.