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

grant musictechnologiesgroup.com grant at musictechnologiesgroup.com
Thu Jul 20 15:03:01 CEST 2023

Consider maybe a new of used AVR. They pretty much all support 
multi-room, multi-channel audio at speaker level.

------ Original Message ------
>From "cheater cheater via Synth-diy" <synth-diy at synth-diy.org>
To "NT" <nathan at idmclassics.net>
Cc "synth-diy" <synth-diy at synth-diy.org>
Date 7/19/2023 10:22:26 PM
Subject Re: [sdiy] Transporting line level audio in home / buzz-free USB 
wall warts?

>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:
>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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