[sdiy] Transporting line level audio in home / buzz-free USB wall warts?

Chromatest J. Pantsmaker chromatest at azburners.org
Thu Jul 20 19:33:19 CEST 2023


How many outputs does your media PC have?  Can you add outputs to that and
just run line-level to regular computer speakers in each room?

On Wed, Jul 19, 2023 at 10:24 PM cheater cheater via Synth-diy <
synth-diy at synth-diy.org> wrote:

> I really really don't want a digital solution. Much less a cloud based
> solution.
>
> 10 meters doesn't seem like that much of a deal. I wonder if I could
> run it unbalanced straight into the speaker's input. I should try
> that. I was thinking of using one of those 1 input, 4 output headphone
> amplifiers as the distribution / levels box. Like this:
>
> https://www.thomann.de/intl/millenium_ha4.htm
>
> but maybe a /tiny/ bit higher end.
>
> On Wed, Jul 19, 2023 at 10:31 AM NT <nathan at idmclassics.net> wrote:
> >
> > I agree that Sonos or some other networked home audio system is probably
> the most elegant solution for this. The engineering is already done, most
> are readily available and there's a bunch of different options.There are
> many "best Sonos alternatives" lists to explore.
> >
> > DIY option - If you search "DIY sonos raspberry pi" there should be a
> handful of results giving info on using Pi Musicbox or other software, but
> you'd still have to add a speaker per unit, and RPi's aren't as cheap as
> they used to be.
> >
> > other DIY zero latency option with decent audio quality... get a small
> FM transmitter and some radios :)
> >
> > Nathan
> >
> > On Wed, Jul 19, 2023 at 3:57 AM Phil Macphail <
> phil.macphail at liivatera.com> wrote:
> >>
> >> Have you considered first gen Sonos equipment? It’s pretty cheap on
> eBay, easy to install and synchronisation between units is what they do
> well. You won’t be able to make anything using any of the SBCs, Bluetooth
> or whatever a cheaply. Most importantly, you will spend time listening to
> it, rather than trying to get a number of general-purpose items to not
> quite work the way you want,
> >>
> >> Phil.
> >>
> >> > On 18. Jul 2023, at 13:48, cheater cheater via Synth-diy <
> synth-diy at synth-diy.org> wrote:
> >> >
> >> > Hey all, I wanted to move audio from my media pc to rooms in my home
> >> > and I was wondering if anyone had suggestions on an inexpensive piece
> >> > of gear that'll do that. I just want to listen to podcasts and some
> >> > music while i'm doing stuff around the house, nothing high quality,
> >> > but I'd prefer not to have hum and static and strong high freq
> >> > rolloff. I'd prefer to do this in analog so that I can turn on
> >> > multiple speakers and they're in phase. I'll be moving the audio over
> >> > a distance of ~ 10-15 meters to 4 different zones. In the target rooms
> >> > I'm going to hook up inexpensive bluetooth speakers with aux input
> >> > running off of a usb wall wart.
> >> >
> >> > Also looking for inexpensive European (Schuko-style) USB wall warts
> >> > that don't have a lot of ripple. I have tried a bunch (~10?) of
> >> > different usb power supplies over the years and almost all of them
> >> > make the speakers buzz audibly. The only one that I have that doesn't
> >> > do that is an ancient Samsung one that I got with I think my Galaxy
> >> > S3. I hope it never dies to be honest.
> >> >
> >> > Obviously a better power supply circuit in the bluetooth speakers
> >> > would make them not buzz, but I tried two different ones (starting
> >> > with Anker Soundcore 2 and most recently Earfun UBoom L) and they all
> >> > do that so... it is what it is.
> >> >
> >> > Best regards
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