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Post by Steve Forte Rio on Jan 2, 2014 19:30:58 GMT
What do you mean by "native decoder" for aac?
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IgorC
Administrator
Posts: 41
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Post by IgorC on Jan 2, 2014 19:32:48 GMT
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Post by Steve Forte Rio on Jan 2, 2014 19:37:54 GMT
Hm, interesting, why do we call it "reference" while it's standalone project, not an Apple or FhG product. If so there is no reasons of why to not use foobar2000 built-in (ffmpeg, AFAIK) decoder, as it surely supports decoding to 32-bit float for each codec.
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IgorC
Administrator
Posts: 41
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Post by IgorC on Jan 2, 2014 19:51:11 GMT
I mean standalone decoders.
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Post by kamedo2 on Jan 3, 2014 0:26:37 GMT
Both MP3, AAC and Ogg Vorbis can be decoded to float 32bit wav using the standalone decoders. (Madplay, Faad2, oggdec).
I don't know about the Opus, though.
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Post by kamedo2 on Jan 3, 2014 0:32:38 GMT
The past public listening tests and my private listening tests slightly differs in the way the normalizations are done.
Public - unweighted RMS, using the ABC/HR for Java
Private - replaygain weighted RMS, using my rawgene4
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IgorC
Administrator
Posts: 41
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Post by IgorC on Jan 3, 2014 17:00:17 GMT
Sorry. Not much activity in these days as I had no time. This weekend I will look into it and also will do a first proposition about sample selection based on what we have discussed previously on Hydrogeaudio. Should see samples those people have submited. We're rolling  |
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Post by Steve Forte Rio on Jan 3, 2014 23:19:57 GMT
kamedo2, we will use ABC/HR built-in RMS calibration. We're going to use foobar2000 only for peak normalization before encoding (I suppose -3 dBFS will be enough).
We can't be provided with enough disk space to store predecoded sample files, so we'll use pack with ABC/HR + decoders + batch file for decoding to 16 bit.
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Post by kamedo2 on Jan 4, 2014 4:30:13 GMT
kamedo2, we will use ABC/HR built-in RMS calibration. We're going to use foobar2000 only for peak normalization before encoding (I suppose -3 dBFS will be enough). normalization? You mean you tweak the wav sample before the encode? I think the encode must be done like the way it will be done in real situations. |
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IgorC
Administrator
Posts: 41
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Post by IgorC on Jan 5, 2014 18:36:43 GMT
Sample Selection.There will approx. 40-50 samples. 85% - music (equal amount of samples per genre) 15% - non-music (speech, mixed as speech+background, ambient etc) Steve Forte Rio has made a proposition hereThe samples will be picked randomly online rolz.org/groupKamedo2, Steve Forte Rio and me have something on our mind. So the final desicion will be a fusion of our contributions. My proposition to include an equal amount of samples from these sources: 1. The set of samples which was made by Chris. Link. It's well balanced set of samples. I'm in favor to include this whole set. 2. The samples from Hydrogenaudio members Link and MPEG sequences from here3. A big list from previous test. Link
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Post by kennedyb4 on Jan 6, 2014 1:46:33 GMT
The test will be open during more time. It's always possible to prolong it.
And it's not obligatory to submit all results.
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Post by kamedo2 on Jan 6, 2014 17:11:39 GMT
 Predicted from the last 2011 AAC public listening test. We can split the job into two, to avoid fatigue on each donator. Chris's set have 16 samples, and we need to include the new samples people uploaded in HA, and the MPEG sequence. |
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Post by Steve Forte Rio on Jan 6, 2014 18:50:27 GMT
My own set of 15 samples (most of them are just cut from my music library). A list with some tags for further sorting: Time.wav - Tonal/non-music (taken from Pink Floyd - Time) tiesto-do_you_feel_me.flac - transient/electronic sinatra_come_fly_with_met.wav - tonal/ vocal music/ jazz (swing) Rachmaninoff_conc3.flac - tonal (complex) / classical Queen_Keep_Yourself_Alive.wav - tonal+transient / rock pink_floyd_-_wish_you_were_here.flac - transient / rock Persona_Jesus.wav - transient/ rock on_a_good_day.flac - stereo / vocal music/ electronic night_day.wav - vocal music / jazz musorgsky_bydlo_1_.flac - transient / classical magic_flute.wav - vocal music(but almost without music) / classical LZ_ImmigrantSong.wav - tonal / rock giovanni_arioso.flac - vocal music / classical Enter_Sandman.wav - tonal / rock Break_on_Through.flac - stereo/ vocal + music / rock
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Post by kamedo2 on Jan 7, 2014 3:02:03 GMT
My proposition:
Whole set of samples from Chris ( 16 )
Whole set of samples randomly picked from the libraries of bitrate calibraters ( 12 )
7 samples randomly picked from the MPEG sequences. ( 7 )
7 samples randomly picked from the huge set of mainly hard samples, used in the last 2011 AAC test. ( 7 )
8 samples randomly picked from the new set of samples from the HA thread. ( 8 )
Total ( 50 )
Of cource, the number is debatable.
If many people agree, we can reduce them to all 8, and make it 40 in total.
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Post by Steve Forte Rio on Jan 7, 2014 11:02:52 GMT
IgorC, please, list all the sample sources we have. To make it clear.
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