[PLUG] Bluetooth A2DP and audio streaming fidelity

VY vyau5678 at gmail.com
Tue Jul 4 21:35:26 UTC 2017


thanks for the input.

On Tue, Jul 4, 2017 at 3:14 AM, Tom <tomas.kuchta.lists at gmail.com> wrote:

> Well, that is different kettle of fish - you mentioned that you want to
> drive amplifier/stereo through RCA connectors.
> This thing would drive speakers directly, making your amplifier
> redundant.
> If you want to just drive your amp, then you need DAC - either one of
>  the cheap USB ones or if you like HiFiBerry - then this would do what
> you need:
> https://www.hifiberry.com/shop/boards/hifiberry-dacplus-rca-version/
> I would advise you to do some google search and see some project pages
> and videos. It will give you an idea what kind of software and GUI you
> can get and if it meets your needs.
> You can control these players/streaming devices using web interface
> from a PC or phone or add touch screen like many others.
> The moment you add a touch screen + case the total cost will go up
> significantly, depending on what you get.
> As an example , the RPi official 7" touchscreen goes for about $60-ish,
> then a case $15-ish ....
> Best luck, Tomas
> On Sun, 2017-07-02 at 08:44 -0700, VY wrote:
> > Thanks.
> >
> > I found this yesterday:
> >
> >  https://www.hifiberry.com/shop/boards/hifiberry-amp-plus/
> >
> > Which is an RPi add-on.  Is it worth trying?
> >
> > -v
> >
> >
> > On Sat, Jul 1, 2017 at 7:34 PM, Tom <tomas.kuchta.lists at gmail.com>
> > wrote:
> >
> > > Yes, even something like this will sound sound better than
> > > Bluetooth as
> > > well as better than RPi for that matter when connected to amplifier
> > > or
> > > car stereo.
> > > It works under linux without hassle.
> > > RPi uses RC circuit instead of real/active DAC that is why it does
> > > not
> > > sound too good.
> > > I have equally "bad" Plugable USB audio adapter for about the same
> > > cost
> > > to feed my car stereo and it sounds OK.
> > > I am talking about casual listening and low cost gear, but not bad
> > > gear, so please bear that in mind.
> > > For better and/or known/guaranteed quality I could not recommend
> > > anything like this.
> > > Tomas
> > > On Sat, 2017-07-01 at 09:04 -0700, VY wrote:
> > > > Thanks
> > > >
> > > > And for the suggestion of using USB dongle, is it something like
> > > > this
> > > > one:
> > > >
> > > >
> > > > https://www.amazon.com/Sabrent-External-Adapter-Windows-AU-MMSA/d
> > > > p/B0
> > > > 0IRVQ0F8
> > > >
> > > >
> > > >
> > > >
> > > > On Fri, Jun 30, 2017 at 6:33 AM, Michael Barnes <
> > > > barnmichael at gmail.com>
> > > > wrote:
> > > >
> > > > > RPI = Raspberry Pi  Small $30 credit card sized Linux computer.
> > > > > Very
> > > > > popular.
> > > > >
> > > > > On Jun 30, 2017 06:12, "VY" <vyau5678 at gmail.com> wrote:
> > > > >
> > > > > > Thanks for your input.
> > > > > >
> > > > > > What is RPI?
> > > > > >
> > > > > >
> > > > > >
> > > > > > On Jun 30, 2017 02:12, "Tomas" <tomas.kuchta.lists at gmail.com>
> > > > > > wrote:
> > > > > >
> > > > > > > Expressing audio quality opinion is pretty dangerous thing.
> > > > > > >
> > > > > > > In my experience - bluetooth music audio quality is pretty
> > > > > > > bad
> > > > > > > no
> > > > > > > matter what you use it with - be it Linux, OSX, iOS, MSWin
> > > > > > > ....
> > > > > > > I find
> > > > > > > bluetooth OK for spoken word
> > > > > > >
> > > > > > > I use cable instead you will hear clear difference with
> > > > > > > decent
> > > > > > > audio
> > > > > > > source. I find BT quite tonaly compressed (muffled)
> > > > > > > compares to
> > > > > > > cable
> > > > > > > connection even in the noisy car environment, not to
> > > > > > > mention
> > > > > > > with Hi-Fi
> > > > > > > and average speakers. Bluetooth quality is especially bad
> > > > > > > and
> > > > > > > observable with good quality BT headphones with cable
> > > > > > > input.
> > > > > > >
> > > > > > > Alternatively, one can get cheap USB audio dongle + RPi -->
> > > > > > > connect it
> > > > > > > to audio and stream to it. It will work over much longer
> > > > > > > distance and
> > > > > > > it will sound superior to bluetooth.
> > > > > > >
> > > > > > > Here are some basic BT measurement and comparison:
> > > > > > > http://www.sereneaudio.com/blog/how-good-is-bluetooth-
> > > > > audio-at-its-best
> > > > > > >
> > > > > > > Just my opinion,
> > > > > > > Tomas
> > > > > > >
> > > > > > > On Thu, 2017-06-29 at 09:14 -0700, VY wrote:
> > > > > > > > Dear All
> > > > > > > >
> > > > > > > > I am using Bluetooth to stream music (mostly MP3 but can
> > > > > > > > be
> > > > > > > > other
> > > > > > > > codecs)
> > > > > > > > from my Linux host to a bluetooth audio adapter that is
> > > > > > > > connected to
> > > > > > > > my
> > > > > > > > amplifier/receiver.   (the bluetooth adapter is RCA wired
> > > > > > > > to
> > > > > > > > my
> > > > > > > > receiver).
> > > > > > > >
> > > > > > > >
> > > > > > > > I am wondering if there is anything I can do on my Linux
> > > > > > > > end
> > > > > > > > of
> > > > > > > > improve
> > > > > > > > audio fidelity?
> > > > > > > > I am not complaining that the audio quality is bad coming
> > > > > > > > out
> > > > > > > > of my
> > > > > > > > speakers but just curious if I can further improve the
> > > > > > > > state
> > > > > > > > of the
> > > > > > > > audio.
> > > > > > > >
> > > > > > > > Any tips much appreciated!
> > > > > > > >
> > > > > > > > thanks
> > > > > > > >
> > > > > > > > -v
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