Having received the new Raspberry Pi 2 Model B I was anxious to experience the results of the Volumio version1.55 distribution. Here are some of my quick observations and setup.
Modified the /boot/config.txt file.
By default the USB ports are limited to 600mA.
With the new option, this is increased to 1200mA.
Heartbeat pulse on the ACT LED
The setup includes the Edimax EW-7811Un wifi dongle and a USB hard drive so increased USB current was required.
Faster Music Player Daemon Database Updating as compared to the Raspberry PI Model B+ is great.
With the IQAudio Pi-Dac+ we are now able to play DSD64.dff and DSD64.dsf files 352.8kHz with no dropouts. These are Direct Stream Digital formats. Realtime on-the-fly DSD to PCM conversion is required as the IQAudio Pi-Dac+ does not support native DSD playback. MPD understands the file formats dff and dsf. This is a significant upgrade for me as it all works flawlessly over the I2S serial bus.
So far the upgrade to the Raspberry Pi2 Model B is a positive experience.