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1
Polls / Re: 2017 Format Poll (lossy codecs)
Last post by ThaCrip -
Now using opus on a clip zip with no issues. Rockbox 3.14. Grateful to all.

I think that pretty much confirms what i suspected as i think you got a noticeably faster CPU (i think it's around 240Mhz but i can't seem to find anything definitive looking around on Rockbox website) than what our e200 series v1 players do which appears to be only 80Mhz.

with that said, i would not be surprised to see Opus use noticeably more battery than AAC-LC does on your device even though Opus functions well for you and there is apparently no laggy menu's while playing Opus encoded music. but i guess as long as the battery runtime does not drop off too much then you ain't got much to lose by using Opus over AAC-LC, especially if you don't care about the whole wide compatibility aspect of which AAC-LC will always beat everything, outside of MP3 of course. but i figure at this point in time it's not likely many devices that work with MP3 but don't work with AAC-LC are still in use anyways.

but i guess when it comes to the whole Opus vs AAC-LC (Apple AAC basically)... i suspect the trade off boils down to less battery life for probably a little better sound at the lower bit rates (when choosing Opus over AAC-LC). but i am not sure how Opus compares to AAC-LC once you get into the 128kbps+ range. but i figure even if Opus wins, it's got to be very little difference to most people in the real world as i would imagine even those with the golden ears etc who can detect artifacts at the 128kbps+ ranges it's probably something they got to be really focused on(?) and when just enjoying their music it would be negligible difference(?). that's basically why i feel Apple AAC @ 128kbps (q63 TVBR) is a safe setting (considering the public ABX test link below @ 96kbps from late-2014 that i linked to below) and is a nice efficient use of the encoder to as your not using excessive bit rates to clean up tiny things.

but as far as the 96kbps range... taking a quick look on these forums i found a public listening test from late-2014 that shows Opus was #1 with Apple AAC being #2 and that was before the Opus v1.2 release earlier this year which seems to further refine the sound quality of the encoder even though, from what i have read, most of the Opus v1.2 improvements are at the really low bit rates (say 32-48kbps or so, maybe 64kbps-ish a bit etc) which i would not be surprised if it squeezed a little more out of it. but like mentioned... with modern encoders like Apple AAC or Opus in the 96kbps+ range they are quite strong to where they simply cannot sound bad, even amongst those with the golden ears. so while these modern encoders are solid, to bad they were not this way say 10 years ago when storage space was not cheap etc as back in those days really low bit rates would have been more appealing as even being able to use 128kbps, like we can today (and for at least most of this decade), would have been nice as, if i recall correctly, using higher bit rates back in those days were somewhat required to get consistently good sound basically.

hell, just last night i was trying to do a ABX test on a random song i had with Opus @ 64kbps (in comparison to the FLAC obviously) and when i started the test i was confident i was hearing a difference for the first 4-5 choices (i was attempting to do 12 rounds in the ABX test) as i made my picks fairly quickly but after that i started losing confidence again (as i was no longer confident i was hearing enough of a difference to make a choice that i was confident in making) and stopped the test. but even assuming someone gives me the benefit of the doubt (in that i was hearing a difference), during the times i was confident i was making the correct choice, the sound was not that much different in that if i was not hearing the Opus @ 64kbps file in comparison to the FLAC file i doubt i could notice any differences when listening to the song straight up as the overall sound seemed consistent but there was something you could notice (i don't know how to describe it as i don't know the technical terms), like something in the overall sound altered just a little to be able to slightly detect it. but this is why i suspect, to play it a bit safer, if i had Opus @ 80kbps i would not be surprised if i could not ABX that, at all. so if that's true, then i would be very similar to some users around here who feel Opus @ 80kbps is a fairly safe setting because even if we could notice it at that point, it would likely be in that major focusing level of concentration etc which when your at that point, or even close, it's pretty safe to say the overall sound is pretty stable/good and likely will be on a wide range of music for us.

p.s. here is the 96kbps test i was referring to above... https://hydrogenaud.io/index.php/topic,106354.msg874674.html#msg874674 ; side note: you notice MP3 seems competitive there (but still a bit worse) but it's also using noticeably higher bit rates. so it's sorta cheating to stay competitive. hence, Opus/AAC-LC are just better as they use noticeably less bit rates to achieve similar sound quality.
2
FLAC / Re: LEVEL 5 TO UNCOMPRESSED
Last post by eahm -
Ahah sorry for posting another one but this is gold: https://www.computeraudiophile.com/forums/topic/20131-flac-vs-wav/

...and this: http://forums.naimaudio.com/topic/flac-vs-wav-audio-quality, I love when they talk about cables and dynamics and fullness etc. lol
3
I'm not changing it but you can get windows 10 colours from the registry...

https://hydrogenaud.io/index.php/topic,110516.msg941430.html#msg941430
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For fun -- I have some demos that I produced and downloaded to a site.   Most are ABBA oriented, but there is some Olivia Newton John and Carpenters. I have been getting VERY GOOD reviews as to the quality.  Had lots of breakthroughs and my face has been "RED" several times with embarassment.  ANY OF MY PREVIOUS DEMOS HAS SUCKED COMPARED TO THESE.  I also have a dolbyA decoder that really works well (there were continual bugs regarding the dynamics until recently.)   You are welcome to the source if you PROMISE to try to port to MACOS, but Linux binaries reside on the site below.  Will do Win64 if told that someone will really attempt to use it.

I am a good software person, but not really a DSP expert, and even less an audio expert (I know DSP and know a little bit about audio, but dont' claim total expertise like I do software.)

REALLY!!! -- HAVE FUN LISTENING:

https://spaces.hightail.com/space/bOPBXTkeeT

There are many 10's of MB of good sounding stuff in there.

PS:  the patent that I am avoiding is a more recent Sony patent that does some things that make it better for computer DSP.   I have the code really working well now, so no biggie.  Thanks for the feedback!!!


John Dyson
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(track info + seekbar + buttons) background color can be changed to automatically get the title bar or taskbar color? Like Groove.
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Polls / Re: 2017 Format Poll (lossy codecs)
Last post by IgorC -
That's true and all but personally i don't want to use a 'phone' for playing music.
I understand.

...and i could exclusively use 128kbps AAC-LC (Apple q63 TVBR).
You can't go wrong with Apple  LC-AAC encoder for 96 kbps and higher.
It was on top of all LC-AAC encoders in every public and personal test here in HydrogenAudio. All claims about superiority of any other LC-AAC encoder is simply not true ( always speaking of  96 kbps and higher)
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FLAC / Re: LEVEL 5 TO UNCOMPRESSED
Last post by includemeout -
Quote
Play the two [compressed/uncompressed FLAC files] back to back, blind, however you want...you'll see what I'm going in about!
or:

Quote
I am happy to read about your experience as they parallel my own more or less.

An audiophool's empiricism is really something to tell the folks back home about. :o

Edit: missing '/quote' tag



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3rd Party Plugins - (fb2k) / Re: foo_onewaysync
Last post by defiler218 -
First, thank you for this awesome plugin. It is just what I was seeking in order to sync my playlist with Android phone.

Strangely I cannot make it work completely. Since I don't need any transcoding, I set my encoder to simple `copy` utility in Windows 10.

Copying to MTP storage works perfectly until the plugin tries to copy .m3u file or near that time. Then plugin freezes so do Explorer if I try to look up MTP folder. After several minutes the storage disconnects. It is very strange because the plugin perfectly copies all files before that for pretty long time. Any idea what might be the problem?
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Polls / Re: 2017 Format Poll (lossy codecs)
Last post by finphil -
Now using opus on a clip zip with no issues. Rockbox 3.14. Grateful to all.