It is my understanding that Ramplay creates a virtual drive within RAM. Therefore you can upload files to this ‘drive’ that’s actually in RAM. This cuts out the bottleneck of playing from a disk drive. Supposedly it provides super clean playback of files. This is what I’ve gathered from the info on RaspyFi.
If I’m correct, the amount of music that could be uploaded depends on the amount of RAM. The RPi only has 512MB of RAM so you would only be able to load a few high quality audio files. What would be nice is if it had the functionality to take a playlist and load several songs into ram as a sort of buffer. Like loading the next few songs actively into ram if you were listening to an album, or even if you were doing shuffle it could go ahead and load the next few songs into ram instead of having to search the drive for the next song wasting precious milliseconds as well as being able to provide the clean audio quickly.
My UDOO arrived today, but still waiting on a card reader. Soon I will be able to start testing the full functionality of this software.