The MIDI Replay Stomp Box (fondly shortened to ‘the Box’) is born from this very experience and more
than delivers on the dream. It is both a MIDI configuration
tool for applying a song’s keyboard settings, plus a four-track recorder providing accompaniment for songs. Other
features include foot-switch control, looping, transpose,
keyboard splits and layers, a metronome, plus syncing data
with its own PC desktop app and writing to standard MIDI
Figure 1 shows the Box in Performance mode; Figure
2 in Edit mode; and Figure 3 looks inside the Box.
At the heart of the system is a PIC16F648A
microcontroller, with its main job being to process MIDI
messages. Data is stored in an external battery-backed
Build the MIDI Replay
As the last notes of the song ring out, it’s only seconds before the next song
starts. You’re the band’s keyboard player and a bead of sweat is on your brow
as you quickly glance at the set list, pick the instrument settings, remember to
transpose, tweak the volume, set the keyboard splits, and then begin to play.
You make it but only just!
A look from the impatient
drummer says it all! As the
song continues, your mind
wanders to how you wish it
was all easier ... how you’ve
always wanted to add some
strings and bass to the song
but can’t ... the frustration
of only having two hands ...
(cue dream sequence).
BUILD IT YOURSELF
By Jeremy Leach
; FIGURE 1. The MIDI Replay Stompbox.
; FIGURE 2. The Box being used in Edit mode.
26 September/October 2018