Not strictly a NAS but i'm running Subsonic on the following setup
HP ProLiant N36L microserver default firmware and 1gb ram
I have various Samsung and WD drives in it with music and video shared
Version 0.7.2 Sabanda (revision 8191)
Built on Sun Oct 9 19:21:33 JST 2011
OS Version FreeBSD 7.3-RELEASE-p7 (revision 199506)
Platform amd64-full on AMD Athlon(tm) II Neo N36L Dual-Core Processor
Its running headless booting off a full install on a 4gb microSDHC card through usb conector with 2gb partition.
Also running on freenas is serviio and samba shares
The only issues ive encountered with subsonic is that as i'm using the am64 freenas build, the packagsite i used installed lame and wouldnt run, think it was 32bit? but the amd64 lame build downloaded from this site works a treat.
Running 4.6.beta2 (build 2566) – 16 November 2011
The ffmpeg download from a freebsd packagesite installed and works perfect with serviio and decodes perfect with subsonic but refuses to encode to mp3 with subsonic default settings, i think the amd64 build is missing an mp3 library or something but cant fix that on freenas as its a stripped down OS. All you have to do is change the subsonic default settings to use lame instead, i use the following
step 1
ffmpeg -i %s -v 0 -f wav -
step 2
lame -V 3 --tt %t --ta %a --tl %l -S --resample 44.1 - -
Hope this helps somebody