The only 'peace' to be found is by those who attend to the spirit of 'God' within them, for "to be spiritually minded is life and peace"
Music is a gift from the Creator,...and the skilled playing of the harp by David DID IN FACT soothe the soul of Saul, didn't it? I enjoy music as the sound of 'God' in its various tones and frequencies, for the sheer enjoyment and pleasure of it, in service to the Creator. Even John notes that some of the redeemed have the 'harps of God', and these I believer are frequency-modulators of some kind, that translates the language of God into melody - hence the sounds of heaven are usually represented by 'harps' since the full musical scale can be played by its strings. The inspiration of David (God's beloved) breathes thru all true ministers and minstrels of the Lord. I cannot deny the mystic order or legacy of the key of David, from whence springs the Messiah. The 'harp' of 'God' is 'universal', and so is the 'language' of the Spirit.
And yet those 'substances' were made by the Creator for various reasons and purposes, hence the medicinal value and properties of many herbs and plants, seeds and fruit which was made for our 'food'. Of course any 'substance' can be 'mis-used' or 'abused' but this is where wisdom and discretion guide. In this context, even as the sages and shamans of many different religious traditions employed natural substances for good,...either 'healing' or in 'religious ceremonies' which enhanced their perception of the Spirit, to receive guidance and direction. This isn't any less 'occult' or a form of 'divination' than consulting the 'Urim' and 'Thummim', casting lots, or effecting some other kind of 'oracle' that was practiced by the Hebrews, or any other ancient school. Therefore on one end of the spectrum I find it entertaining that some fundies are all worked up over anything of this kind, like its all 'satanic' or something. I think some ignorant presumption is there, besides a need for further research and consideration of the subject, understood in its proper 'context'.
The ability to make music was given to the line of Cain. Go figure...