The Art of Sweetened Tuning — Harp Tuning

Peterson tuners feature unique Sweetener™ presets not found in any other brand of tuner. This comes from an almost 70-year legacy that reaches back to the dawn of popular music as we know it today.

Decades of research and the experience of musicians the world over has led to the creation of the “Sweetener”, a system of preset tuning offsets designed for specific instruments, only available on Peterson tuners, and used worldwide wherever precise and professional results are expected.

Peterson strobe tuners have long been the choice of harpists, harp technicians and regulators. The current Strobo series of tuners from Peterson includes the StroboPlus®, a compact and affordable battery operated tuner which is capable of stretching octaves and features three preset stretched tunings for harps of various sizes. Three pre-set stretched tunings are included, HP1, HP2 and HP3.

Peterson StroboPlus HD


For pedal harp, use the HP1 Sweetener™ preset. This is the widest- ranging stretched tuning of the three harp presets, extending over six and a half octaves.






For lever harp, use the HP2 Sweetener preset. This stretch extends over five octaves







HP3 is an alternative stretch for medium to large sized concert harp. It extends over five octaves.





Current Peterson tuners featuring the HP1, HP2 & HP3 Sweetener settings described above:

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Suggested Peterson tuners for professional harp technicians and regulators include:


(Left to right) Peterson AutoStrobe, Peterson Strobe Center 5000-II and Node model 8001























©2013 John Norris for Peterson Electro-Musical Products, Inc. All rights reserved.