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This confirms your order of the DIFFUSION audio tool.
Please check your email for the link to download your preferred DIFFUSION audio file. You will have the choice of either an Apple-compatible (lossless file; smaller file) or non-Apple compatible (Windows or Android; larger file).
A reminder to use the file as downloaded – DO NOT convert to mp3 or other compressed format. Instead, listen to the tones directly from the downloaded file. Conversion to MP3 or other lossy/compressed formats eliminates important higher overtones recorded on the DIFFUSION audio tool. For the same reason, DO NOT use noise-cancelling headphones or ear buds.
You can click on the image below for a PDF file of DIFFUSION instructions.