[LAU] Lossy compression quality etc. [WAS] Re: Music: Too Late for Goodbyes ?

From: Lorenzo Sutton <lorenzofsutton@email-addr-hidden>
Date: Fri Sep 29 2017 - 15:38:38 EEST

On 29/09/2017 07:27, ORL - AMMD wrote:
> Hmmm. Those links are pretty "discutable". Telling that 128kbps is OK
> for mobile and/or non critical material like rock or heavy metal seems
> to me completely false: have you never heard "swiiiiiiish" in the hi
> hats of such productions when using low bitrate mp3 (in which I include
> 128kbps)?

http://www.npr.org/sections/therecord/2015/06/02/411473508/how-well-can-you-hear-audio-quality

>
> By the way, mp3 works on psycho-acoustics, and is based on the concept
> of masking frequencies, so using a spectral view to explain that the
> frequency content is or is not there is a non-sense when the principle
> lies on the fact that those frequencies wouldn't have been "heard" in
> the real world when positionned after certain other frequencies.
>
> And I don't think "sacrifying" low and high ends means that low and high
> ends aren't present, it just means that they are altered, and that you
> can't check with a spectral view.
>
> Still, I suggest using flac, bandcamp does accept that file format.

IMHO:
- FLAC for long-term archiving / preservation (because if you are
archiving big quantities of audio even the ~ 0.5 compression counts...)
- Transparent compression [1] for online streaming / everyday listening.
Better if with an open, non-patent-encumbered format as MP3 is (ogg,
opus, ...)

Opus is pretty remarkable in terms of quality [2] vs. compression
rates... Wonder why it's not spreading faster.

Lorenzo

[1] https://en.wikipedia.org/wiki/Transparency_(data_compression)
[2] http://opus-codec.org/

>
>
> Le 29/09/2017 à 00:30, Paul Davis a écrit :
>> There is no significant effect of MP3 encoing bitrate on low end
>> frequency.
>>
>> https://www.mp3-tech.org/tests/pm/MP3-128k.htm
>> https://www.mp3-tech.org/tests/pm/MP3-160k.htm
>>
>>
>> On Thu, Sep 28, 2017 at 5:49 PM, Be <be.0@email-addr-hidden
>> <mailto:be.0@email-addr-hidden>> wrote:
>>
>> Soundcloud uses 128 kbps MP3, so extreme highs and lows will be
>> sacrificed. If you want to distribute your tracks as you hear them
>> when you're making them, make them available as lossless
>> downloads. Bandcamp is a good option for that.
>>
>>
>> On 09/27/2017 11:09 PM, jonetsu wrote:
>>
>> Hello,
>>
>> This is a fast-paced 'organic techno' (of sorts) synth track.
>> It was
>> fun to mix.
>>
>> https://soundcloud.com/nominal6/too-late-for-goodbyes
>> <https://soundcloud.com/nominal6/too-late-for-goodbyes>
>>
>> Unfortunately the bass was mostly eaten by soundcloud.  Almost
>> sounds
>> AM-like. I'll have to figure this one out when mixing: why is
>> the bass
>> largely diminished on soundcloud and how to compensate, if
>> possible,
>> for this.
>>
>> Cheers.
>> _______________________________________________
>> Linux-audio-user mailing list
>> Linux-audio-user@email-addr-hidden
>> <mailto:Linux-audio-user@email-addr-hidden>
>> https://lists.linuxaudio.org/listinfo/linux-audio-user
>> <https://lists.linuxaudio.org/listinfo/linux-audio-user>
>>
>> _______________________________________________
>> Linux-audio-user mailing list
>> Linux-audio-user@email-addr-hidden
>> <mailto:Linux-audio-user@email-addr-hidden>
>> https://lists.linuxaudio.org/listinfo/linux-audio-user
>> <https://lists.linuxaudio.org/listinfo/linux-audio-user>
>>
>>
>>
>>
>> _______________________________________________
>> Linux-audio-user mailing list
>> Linux-audio-user@email-addr-hidden
>> https://lists.linuxaudio.org/listinfo/linux-audio-user
>
>
>
> _______________________________________________
> Linux-audio-user mailing list
> Linux-audio-user@email-addr-hidden
> https://lists.linuxaudio.org/listinfo/linux-audio-user
>
_______________________________________________
Linux-audio-user mailing list
Linux-audio-user@email-addr-hidden
https://lists.linuxaudio.org/listinfo/linux-audio-user
Received on Fri Sep 29 16:15:01 2017

This archive was generated by hypermail 2.1.8 : Fri Sep 29 2017 - 16:15:01 EEST