Как я осовременивал двадцатилетний домашний кинотеатр, или как упасть в глазах аудиофилов
О приключениях с доставшимся мне по наследству Philips LX8300SA , как я его пытался осовременить для использования с моим Mac, используя не совсем предназначенные для этого костыли.
https://habr.com/ru/articles/861748/
#pipewire #blackhole #mac #linux #звук #spdif #51 #пространственный_звук
Необычный случай с ремонтом китайского декодера аудио 5.1
Год назад я приобрёл на Авито по символической цене в 300 р. неисправный китайский девайс под названием «ЦАП 5.1 Bluetooth декодер» модели HD920Pro. Это универсальная приставка аудио, выполняющая роль mp3-плеера с USB флешки, плеера через Bluetooth (Bluetooth ресивер), звуковой карты, декодера 5.1 звука с SPDIF (коаксиала или оптики Toslink) и прочее. В данной статье я решил поделиться с читателями, пожалуй, как я считаю, необычным случаем моей ремонтной практики. Хотя, всякое может быть. Может для кого-то, кто занимается ремонтом глубже, этот случай покажется совершенно обычным.
Hello #audio #engineering bubble!
I'm searching a way to change volume on a 5.1 #spdif signal by digital means (aka: serial, spi, network, ...)
Can be a device i could buy, but i'm also not afraid of soldering if necessary.
Anyone got some pointets for me?
I've learnt that #TOSLINK and S/PDIF while #digital don't provide the same bandwidth for #audio than #HDMI 1.0. It feels weird though to connect any non-video media player to my #amp through... HDMI. Is there some digital standard that basically is HDMI sans #video?
This would be especially useful since while my amp does have HDMI input it is a bit... picky and despite pass-through enabled it reduces the video quality to FHD only in a setup like [source]->[amp]->[sink]. So currently I'm splitting the HDMI into video (HDMI again) and audio (TOSLINK or S/PDIF) and feed only the latter to the amp.
I acknowledge that the difference b/w S/PDIF and HDMI audio is probably not audible to me, but it annoys me in great detail nonetheless, that there seems to be no non-video connector for digital audio on par of HDMI. I wonder when we'll be connecting computer speakers to the PC via HDMI...
Adding Optical Audio to the Raspberry Pi with One Chip
In the home theater space most people would tell you the age of optical audio, known officially as TOSLINK, is over. While at one time they were the standard for surround sound systems, the fiber cables with their glowing red tips have now been largely supplanted by the all-in-one capabilities of HDMI on new TVs and audio receivers. But of course, that doesn't mean all that TOSLINK-compatible hardware that's in the field simply disappears.
If you're looking to connect a Raspberry Pi to the optical port of your AV system, [Nick Sayer] has you covered. His "TOSLINK Transceiver Hat" utilizes a WM8804 chip from Cirrus Logic to go from the Pi's I2S audio output to S/PDIF. From there the signal goes directly into the TOSLINK input and output modules, which have the appropriate fiber optic hardware and drivers built-in. All you have to do from a software standpoint is enable a boot overlay intended for a digital-to-analog converter (DAC) from HiFiBerry.
The WM8804 is joined by a handful of passives.
Speaking of which, comparing this project with commercial offerings from companies like HiFiBerry is somewhat unavoidable. While we can't say for sure how the simple design [Nick] has come up with compares to more expensive (or even cheaper) options on the commercial market, obviously going the DIY route always nets you extra points here at Hackaday. Plus, we've always been fascinated with projects that tackle this relativity rare example of consumer-grade fiber optic technology.
[Nick] is offering his assembled TOSLINK hat for $40 USD on Tindie, but he's also made all the necessary files available for anyone who wants to build one themselves.
#homeentertainmenthacks #raspberrypi #i2s #opticalaudio #spdif #toslink
