Listening to Solfeggio Frequencies and playing them on a musical instrument could potentially provide different experiences, but not because the frequencies themselves change. The frequencies remain the same; what changes is your interaction with and perception of the sound.
When you play a frequency on a musical instrument, you are actively involved in the creation of the sound. This can provide a sense of satisfaction and engagement, and it also allows you to experience the physical vibrations of the sound as you play the instrument.
On the other hand, listening to a pre-recorded Solfeggio Frequency is a more passive experience. However, it does allow you to focus entirely on the sound and your reaction to it, without needing to concentrate on playing the instrument. This might be more suitable for meditative practices or if you don’t have the means to play the frequencies yourself.
When listening to something like a tuning fork or computer generated tones, you are hearing a pure tone. This means that there is no variation in the frequency. When playing an instrument, there may be variations in the frequencies being played. Vibrato is the technique where you play your note slightly sharp and slightly flat creating a “shaky” or “wavy” tone. Vibrato is commonly used in many different genres of music and is very pleasant to hear, however if you are trying to actively meditate and get the most of the Solfeggio Frequencies, listening to a pure tone might be more beneficial.
Regardless of the method, remember that people’s experiences with these frequencies are highly subjective, and what works best for you may depend on your individual preferences and circumstances.