Here are some suggested donation amounts:

5€ - bach looks cool, might give it a try

25€ - thanks guys, bach is very useful!

50€ - bach has changed the way I work (includes mention in the Max window when the "donors" message is sent to bach, by clicking a [; bach donors] message box, starting from the following release — please state your full name in the donation comment)

100€ - bach has changed my life (includes the above, a mention in the website, and maybe an item of bach merchandising... someday! 🙂

1000€ - without bach my life has no meaning (includes the above and a personal bach tuition via Skype).