My suggestion is enjoy it. If you like put on some mozart or baroque while photoreading this can help to keep the mind in the ideal state too. There are occasions when appropriate music is handy to the process. However it's pointless anchoring yourself to music since it's not always convienient to "plug yourself in".That's why the photoreading system encourages you to stay free of external attachments.
I doubt that it will adversely affect your photoreading skills unless you decide to make an issue of it. Like I said if you happen to experience that, enjoy it and put on the helpful styles of music rather than rock and roll types 
at least you don't need to worry about the batteries going flat or wiring yourself up, use baroque; mozart; or wordless music when photoreading and enjoy the benefits of putting your mind into the appropriate state using your own internal triggers.
Alex
