Sony has been working with the makers of Guitar Hero World Tour, Rock Band, SingStar and Rock Revolution to ensure PS3 instrument peripherals will work across all of those titles.
"For the past several months, we have been working closely with Neversoft and Activision, Harmonix and Konami to ensure that PlayStation 3 guitars and drum-sets will all feature a basic level of gameplay compatibility," said Michael Shorrock, boss of third-party relations at Sony, on the US PlayStation blog.
"For the most part, this means that the titles with musical peripherals will work with the other's software. A few specific examples include: Guitar Hero World Tour's guitars and drums will work with Rock Band 2 and Konami's Rock Revolution software.
"And yes, you guessed it, Rock Band 2's guitar and drum-set will work with Guitar Hero World Tour and with Rock Revolution," he added.
Shorrock added that the drums from Rock Revolution will work in both Guitar Hero World Tour and Rock Band 2. The latter games will also support the SingStar microphones in the same way a loving family would.
Sony is working on ways to make previously-released music games compatible with each other, too.
Perhaps this means each developer will add more game-specific design features into their peripherals to tempt you to part with your money.
Activision Blizzard announced parallel to E3 that Guitar Hero World Tour on Xbox 360 would support instruments from Rock Band 2.
Activision Blizzard also recently told us Logitech had been given the green-light to make third-party instruments for Guitar Hero World Tour.