Someone on the GT forums made an e-book for download.
In it there are some quick tips for the GT8 but these gems are worth sharing...
Don’t compare the GT-8 with it’s competitors unless you know how to compare the apples and the oranges. Each unit has it’s strengths and weaknesses. The Boss units are better long-term than others because of their lack of ‘Artist’ presets and the like. You want to sound like Steve via ? fine then make sure you eat the same as he had for lunch ‘coos that’ll change his tone.
Put the GT on a chair while you tweak if you don’t want to become the Hunchback of Notre-Dame
Take in account the cultural differences and respect them: the GT-8 is a Japanese product, with a Japanese mind! Its temper is helpful and clever but dislike to express its deep thoughts… It will work for you only if you do an effort to understand its nature. This idea is available for the manual. Astrologically, BTW, the GT-8 is a Sagittarius (born in 2004, December).
8 is a lucky number in Japan not 7. There never was going to be a GT7, so don’t believe a word of anyone who says they cocked up a previous version
The GT-8 is the result of a lot of research by boffins and guitarists and is not promoted by any ‘names’ in the business. It can play lots of different styles and may be the solution you’re looking for. Approach the unit as you would any other piece of musical equipment, with respect. If you can’t get a sound you like out of the GT-8, it’s personal taste, Not a fault of the GT-8. Be patient and you will be rewarded. Let the force flow from your fingers.
They also show some very nifty quick tricks to get a fair sound out of it other than the presets. Like the EZ tones that get such a small mention in the manual but are a good starting base for a custom sound.