Harmonic Spectrum & Otto Tuning Forks Set

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Harmonic Spectrum and Otto sets. Two set of tuning forks with cases.

These are the two sets required for the Sound Healing Academy’s Level 2 Diploma in Integral Sound Healing (for working with individual clients) and also for the Level 1 Foundation in Integral Sound Healing with Tuning forks. Bought together these sets are discounted. 

Please note the Om weighted is also covered in both courses mentioned above. This fork is optional. If you do not have this fork you may use the Otto 128Hz instead, however,  there is one exercise where you can use both the Om and Otto 128 together so it is useful to have both. If you wish to have the Om weighted as well, please add it to cart. 

Harmonic spectrum unweighted tuning forks set of 8 with velveteen case 

Harmonic spectrum tuning forks (unweighted) with case

The Harmonic Spectrum 8 piece set contains a full octave of tuning forks (C, D, E, F, G, A, B, C).

They create a series of musical intervals to help you relax, centre yourself and release stuck, blocked energy.

Each interval affects your nervous system in a different way by activating specific healing qualities. This is done by tapping two forks together.

It is also possible to balance the energy in the chakras with this tuning fork set.

This table shows the association between chakras and tuning forks:

Root Red C 256 Hz
Sacral Orange D 288 Hz
Solar Plexus Yellow E 320 Hz
Heart Green F 341.3 Hz
Throat Blue G 384 Hz
3rd Eye Indigo A 426.7 Hz
Crown Violet B 480 Hz
Higher octave of Root White  C 512 Hz


Otto Set of tuning forks

Set of 3 weighted Otto forks (osteopathic forks) with cases.

Otto tuning forks are used for relaxation, and for sending vibrations into the bones. The forks are tuned to the frequencies of 32hz, 64hz and 128hz. They vibrate at a low pitch due to their weighted prongs. These forks are especially effective when placed on the sternum, vertebra and meridian points. These frequencies project sound into the physical body, especially in the bones.

Otto 32 Hz weighted Tuning fork

C-32Hz is helpful for the following:-

  • Good for stimulating the flow of lymph
  • Boosting immune system
  • Repair and regeneration of peripheral nerves
  • Enabling greater mobility of cranial bones and helping to relieve migraines, headaches, mood swings.
  • Stimulus hair growth
  • Good for grounding.

The Otto Tuner is the note of C in the diatonic scale.

Otto 64 Hz  weighted tuning fork

C-64Hz – helps loosen sacral ligaments and stimulate and balance between the sympathetic and parasympathetic nervous systems. Useful in emotional trauma and grounding.

Otto 64 Hz is very effective when used around the sacrum as it aids balancing the autonomic nervous system.

It assists in the following:-

• Better sleep

• Reduced aches and pains

• Lifting depression

• Overcoming sexual and menstrual dysfunctions

• Improved immune system

Otto 128 Hz  weighted tuning fork

Otto 128 Hz  reduces pain in joints and can but used on, or around stiff or painful joints, on the sacrum and Chakras points.

Benefits include:-

• Increases joint mobility

• Spikes nitric oxide

• Stimulates endocrine glands

• Releases psoas muscle

• Relaxes organs within pelvis

An excellent fork to use alongside the weighted Om as the combination with the notes being so close creates a dissonance that assists in breaking up stuck energy.

These instruments are made from special grade aluminium alloy and frequency is guaranteed to be tuned to an accuracy of +/- 0.25%. Tuning forks all come in a velveteen carry bag . They are made in India and they are cut (not moulded) and are of good quality and great value.



We sell 4 different types of activators:

  1. Wooden mallet with a rubber ball end - good for both unweighted and weighted tuning forks
  2. Red rubber activator - best for weighted tuning forks
  3. Black rubber activator - best for unweighted tuning forks
  4. Leg activator with strap - good for both unweighted and weighted tuning forks

Interested in learning more about Tuning Forks? You can see all our online Tuning Forks courses here.