Peterson StroboPlus HD Owners Manual - Manual (Page 17)

TUNING BY STRING NUMBERS
GTn Displays string numbers instead of note names for 6 & 7 string guitars (7654321 instead of BEADGBE)
BSn Displays string numbers instead of note names for 4 and 5 string bass guitars 54321 instead of BEADG)
HARP
HP1 Peterson Pedal Harp Stretch Sweetener
HP2 Peterson Lever Harp Stretch Sweetener
HP3 Peterson Costanzi Harp Stretch Sweetener
MALLET INSTRUMENTS
MBA Peterson Marimba Stretch Sweetener
VIB Peterson Xylophone Stretch Sweetener
ELECTRIC & ACOUSTIC PIANO
RHO Rhodes Electric Piano Stretch
SMG Acoustic Grand Piano (SMGD). Stretched tuning for acoustic grand piano
UPR Acoustic Upright Piano (UPRT). Stretched tuning for acoustic upright piano
HARMONICA
This collection of harmonica tunings comes from Hohner
OMB Original Marine Band Tuning for Harmonica in C
MMB Modern Marine Band Tuning for Harmonica in C
MSR MS Richter Tuning for Harmonica in C
S20 1896 Marine Band/Special 20 Tuning for Harmonica in C
MSM MS Models Tuning for Harmonica in C
CYT Country Tuning for Harmonica in C
NMT Natural Minor Tuning for Harmonica in C
HMT Harmonic Minor Tuning for Harmonica in C
GMT Golden Melody Tuning for Harmonica in C
CHT Chromatics Tuning for Harmonica