check out this unregulated power supply

[sidmonster]

A worthy candidate for MBSID? I already built the c64 optimized PSU, but always looking for a modern solution:

http://www.paia.com/proddetail.asp?prod=K114&cat=50

[m00dawg]

That is basically just the start of a bipolar power supply, which makes sense since that is part of the PAiA kit stuff and bipolar supplies seem to be common in analog synths. It's super basic - you still need to regulate the voltage down to what you need (+5V and +9 or +12V depending on your SIDs) as well as the extra filtering caps. Basically if you're going to go that far, might as well go all the way. I don't know what your design plans are though so not knowing that makes it hard to suggest a specific PSU options (of which there are many).

If you're interested in building your own PSU, or wanting to go with a modern solution, check out thread. It's a rather long thread but covers both linear and high frequency switchmode supplies that should be suitable for audio applications. The debate will probably never end over linear versus switchmode so form your own opinion is the best advice I can give :) Note that messing around with PSUs suggests you are knowledgable enough to know how to safely deal with mains voltages. If that is not the case, I would steer clear of custom PSU options and stick with the standard solutions. Depending on your design, that's probably a C64 PSU or a linear regulated wall-wart.

And actually you probably can get away with a wall-wart in most cases unless you're going with something fairly fancy (external filters, fully stuffed MB-6582, custom chassis, etc.).