Viewing 15 posts - 1 through 15 (of 16 total)
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  • #973
    Guillou
    Member

    Hi,

    What is your opinion about streaming in mono with a low bitrate (48k or less) ?
    What kind of codec would you prefer (AAC+ ?) ?
    To help you, the low bitrate would be for mobile, martphones…
    Please help me to make a good choice…
    Experts comments from LeeXS and JesseG are welcome ! 🙂

    #11523
    timmywa
    Participant

    For music, AAC+ is pretty much the way to go for lower bitrate. Down to 24kbps is still really good sounding.

    Compatibility is hardly an issue anymore as for the past year or so, iTunes has supported AAC+ streams. So you have Winamp, iTunes and a number of flash-based players that can all play aac+ streams.

    Good luck!

    #11524
    JesseG
    Member

    for mobile devices, HE and PS profiles of AAC have a pretty broad support in hardware over the last 5 years. most J2ME/Brew included, and of course any of the newer "soft" models with decent CPUs basically all have support for most of MPEG4 that’s used right now.

    for mono, HE profile AAC is decent, and depending on the sample rate & the content you can get down below 16kbps (not including transmission protocol overhead).

    but with PS profile AAC you can get a pretty darn good sounding stereo 44.1kHz at rates of 24kbps area (without overhead) so… and combine that with the probability of people plugging headphones of some kind into their phones these days… that’s an option that would be silly to ignore – more and more as we progress along the current path.

    not to mention 24kbps 44kHz stereo PS-AAC sounding pretty great in cars too. 8)

    if you want low bitrate mono for mostly speech only… XIPH’s Speex codec is the way to rock.
    http://www.speex.org/

    #11525
    sneradio
    Member

    AAC+ @ 24kbps 32kHz stereo sounds fairly decent as my station will demonstrate. Check it out at http://loudcity.com/stations/soft-n-eas … isten.html

    #11526
    JesseG
    Member

    [quote author=”sneradio”]AAC+ @ 24kbps 32kHz stereo sounds fairly decent as my station will demonstrate. Check it out at http://loudcity.com/stations/soft-n-eas … isten.html[/quote]

    HE or PS profile? That’s an important factor at those bitrates.

    #11527
    Guillou
    Member

    Same question as JesseG : HE or PS ?

    An other question. Have you tested the modified version of edcast ?
    http://users.tpg.com.au/radiorio/
    This version would improve PS… I haven’t tested it yet.
    Edcast doesn’t seems to be developped by his autor…

    #11528
    JesseG
    Member

    I’ll poke Ed about setting EdCast up on sf.net or something. I don’t know how many people would be interested (or capable) of making it better, but it’s worth a shot I guess. Ed’s pretty crazy busy working for Ando over the last 5+ years.

    For 99% of use though, the presets that CT put into its codec (use the newest version possible) that the regular EdCast uses is as good a quality as you can get anyways. Only in specialized situations does that other version offer any advantage. In my opinion.

    #11529
    sgeirk
    Member

    Here’s a 44.1khz 48kbps AAC+ stream using Live, unfortunately, due to the wide varying levels, there’s a compellor in front of it doing level work only.

    #11530
    sneradio
    Member

    [quote author=”JesseG”]HE or PS profile? That’s an important factor at those bitrates.[/quote]
    According to my Edcast config it is "AAC+V2 parametric stereo". I believe AAC+V2 implies both HE and PS profiles. Is that right?

    #11531
    timmywa
    Participant

    [quote author=”Guillou”]Same question as JesseG : HE or PS ?

    An other question. Have you tested the modified version of edcast ?
    http://users.tpg.com.au/radiorio/
    This version would improve PS… I haven’t tested it yet.
    Edcast doesn’t seems to be developped by his autor…[/quote]

    What is "custom" about this version of EdCast??

    #11532
    Guillou
    Member

    Just simply click on the link that you have quoted…
    All is explained.

    #11533
    knigget
    Member

    Where are people getting their codecs from?

    I think a sticky for ‘get your codecs here’ would be a great idea also :mrgreen:

    #11534
    timmywa
    Participant

    [quote author=”knigget”]Where are people getting their codecs from?

    I think a sticky for ‘get your codecs here’ would be a great idea also :mrgreen:[/quote]

    Except for the latest versions of Winamp, you could pull the enc_accplus.dll from the winamp folder. The Lame encoder is posted up on a sticky by Leif and Jesse called something like Best for Streaming MP3 something-something.

    By the bye… now that winamp has somehow embedded the aac+ encoder, where’s a good place to find newer ones as they are made available?

    #11535
    JesseG
    Member

    http://stashbox.org/1025842/enc_aacplus.zip

    From the latest Winamp, v5.581. Not sure if it’s newer than anything past, but… yeah. It’s still in the installer. Not sure where you heard it wasn’t.

    #11536
    timmywa
    Participant

    Thanks, Jesse. I don’t know what I was thinking. I swear I looked around and couldn’t see any actual DLL files. I see them now in the plugins folder.

    Guess I was high or something!

    Thanks!

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