There’s lots of interesting technical bits here that I appreciate reading, so cheers to those sharing their wisdom !
I just wanted to throw in my thoughts and make a case in general for lossless codecs like FLAC and against lossy in general - it’s really more about future proofing the files from an archival perspective with the listening experience being secondary. It’s to avoid bad decision making today when it comes to digitization / conversion workflows. That comes at a cost with larger files but harddrives are cheap. If you’re reading this and thinking “But how can I get all of music on my phone / laptop / tablet?!” or “It sounds good enough!”, well I guess that’s that and you can stop right here since convenience is the main goal and these other issues will just be hypothetical nonsense.
In the last 20-25 years since mp3 really became mainstream and ubiquitous there’s been constant conversations along the way where people would claim 128kbps is good enough, then it was 192kbps and now of course it’s 320kbps or AAC is better than mp3.
Perhaps ‘good enough’ today is finally close enough to lossless where we can truly not stress about it anymore. But ‘good enough’ in the past often seemed like the perfect solution when in reality it was far from it. I’ve experienced this first hand whether digitizing a VHS tape, scanning images, transferring records / tapes or ripping CDs. I thought I achieved good results only to realize years later that it could have been much better. Can most people be certain ‘good enough’ - 320kbps AAC - or whatever, is satisfactory for all their future needs?
A specific example that bugs me endlessly is when a demo tape, vinyl or record was shared online in mp3 format. Sometimes it might be the only version of that sound source that exists. That demo tape is impossible to find now. That vinyl might be too expensive or too complicated for most to transfer again. The quality of that lossy encoded file is forever. It was good enough 5-10-15 years ago but now you listen to and it sounds like garbage (bad playback deck, weird clipping, subpar encoder). You can remaster the files with Audacity but with lossy formats, the encoding noise just comes right out once you start playing with the frequencies or doing some noise reduction.
Another point is that the noise floor on those demo tapes, bootlegs and records (whether inherit or introduced by hardware) can be unbearably high and can take up a lot of bitrate. So sure, it’s a 192kbps encoded demo tape…but perhaps half of that bitrate went toward encoding noise which is the most demanding of any encoder. So really your signal is bit-starved. If it were a lossless / FLAC file, there’s more of chance at restoration / remastering because of the higher bitrate and less compression. This is an edge case and is not applicable to CD sourced music which is what the majority of people hear are really concerned about which brings me to…
Not every software / encoder is the same. Some do a better job than others. Average people don’t search for the best software to use, simply didn’t know about one at the time or maybe pick the first thing that ‘just works’. That mp3 / aac encoder from yesteryear seemed great but now you’ve graduated from earbuds and finally got those dream headphones or floorstanding speakers and all of sudden you hear the defects.
So why not get flac? A lossless FLAC CD file might only be 400-700Kbps depending on the music so it’s really just double a 320kbps CBR file.
A 3-4-5-10tb harddrive easily holds 1000’s of lossless albums.
I’ve got a 4TB SSD holding 1000’s of albums in FLAC - CDs, tapes, 24bit 96Khz vinyl transfers. Maybe it’s 10-20,000 albums. I don’t even count. It’s like an endless black hole of space for a minimal price. I know realistically I can’t put everything on my phone so thinking I should crush everything to AAC or mp3 for that use-case is just an unnecessary requirement for my collection. I’m perfectly fine listening to mp3s in the car where the ambient noise will negate the subtle differences I might hear between lossy and lossless. If I want to listen loud and proud at home, I’ve got the FLACs to nerd out on.
TL:DR.
- Harddrives are cheap.
- Lossless is the way to go - save that as a ‘master’ and then convert down to your use-case which will always change. You’ll save yourself time in the future trying to hunt something down again.
- If fitting all of your files on your phone (or your laptop’s SSD) is your end-goal, well sure go for it. Everything else I suggest is unnecessary and too ‘audiophile’.