Re: What is the bitrate of your Opus files?
Reply #24 –
Looking through the comments in here etc etc, it seems the following four choices are best, especially if one has some concern for efficiency...
-48kbps = Usable, especially if storage space is of higher concern and you don't mind sacrificing some sound quality. hell, even 32kbps is respectable in the overall quality of the sound for such a low bit rate but I can't imagine most people going under 48kbps unless they heavily favor storage space over sound quality.
-64kbps = This is what I would suggest as a minimum for music in general as overall sound quality is 'good enough' and file size is minimal. I suspect this would be 'good enough' for many people.
-80kbps = This is probably a good choice for those who don't mind the 64kbps setting but want to play it a bit safer in sound quality and are still looking for solid efficiency.
-96kbps = It seems many agree this setting is quite good in sound quality and is still efficient. any higher and Opus starts to lose it's appeal as I figure 128kbps would be the limit I would consider for Opus since beyond that seems overkill and efficiency would be mostly shot beyond 128kbps.
all-in-all... I voted for the 64kbps setting for now since I tend to view Opus as trying to get maximum efficiency without sound quality taking any obvious drop offs on a typical song when just listening to your music and enjoying it without having to focus too much to spot artifacts. I suspect 64kbps would please many people. also, I basically see Opus as a slightly more efficient version of AAC and to get those benefits it seem to be 96kbps-ish and lower as once you get into the 128kbps+ ranges your probably better off using Apple AAC for compatibility sake.
NOTE: I don't really use Opus much, but when I do, it pretty much boils down to the above comments. if Opus was more standardized, and especially if my old Sandisk Sansa e250 v1 player (2GB internal memory, with a 16GB MicroSD card = 18GB total storage space) worked well with it(it seems it's a bit too CPU intensive on Rockbox), there is a pretty good chance I would be using it over Apple AAC @ 128kbps (lowest I would use on Apple AAC would be 96kbps).
p.s. I use Opus for speech @ 14-16kbps as I feel the 14kbps setting is about the lowest I would suggest before the quality starts to take a decent hit.