Sound Quality in release 4.1

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Why would you believe that Forum posts represent some sort of absolute measure of anything? Its usually just the opposite because of cooperator bias, nonresponse bias, etc. For example, users that like moOde 4 SQ may simply not post about it and conversely users that don't like it may be more inclined to post.

I was a firm believer in the advanced kernels for 3.x but am happy with the sound quality of 4.x.

I didn’t directly compare to 3.8.4 with my preferred setup (ll + fifo) but I recently did compare 4.x to picoreplayer which has an rt kernel option and didn’t notice any substantive difference either with tidal hifi or ssd hosted flacs over usb. I don’t do any resampling though so if you have processor heavy workloads that you think are introducing latency be sure to have processor set to performance, turn off any underclocking, and maybe consider one of the new Pi 3+ models with faster processor.