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In other words if a 1611 (EU) converter failed, it must be replaced by a 1636 (EU)
Sounds a bit strange. In the 1636 schematic you provided the circuit does not contain the typical ML power supply for the data lines. So in no case it could act as a ML master.
SL-config is not connected to ML-sense
You can see in the schematic that SL_Config is actually an output. The “CPU CARD” can set it’s SL_CONFIG pin low which will then provide a logic high signal (5V) on PC pin 1.
SL probably stands for slave. Maybe to tell a peripheral connected to the PC socket that the PC source was activated?That’s interesting ! Any insight on the mechanism that lowers the THD here ? Too much drop through the resistors ?
Only noticed when measuring a PCM5122 on the audio analyzer (pretty much the same chip on the analog output). Never made much assumptions why this is actually the case. In-field you will either see the 470R from the datasheet / EVK being used or a value around 100 … 75R. The ones with a lower value were likely be tuned with a proper analyzer, the others are probably just copy-paste. Just make sure you have proper ESD protection. Also sometimes they don’t like a ferrite bead (FB3?) in front of the analog power input. Better to have the whole system powered by a buck converter and only have a small LDO for the analog part of the DAC.
With exception of the PCM5242 (convenient if you need symmetrical output) I stopped using those TI DACs a while ago because they also seem to have a higher variability in quality than usual. E.g. ESS has a part that is pretty similar to the PCM5102 and has no such issues.
Not that all that would make any difference when connected to vintage Beo gear… 😉and the recommended output cap is a 10µF tantalum
You mean 100 uF, right? Which is likely also the reason why they are recommending tantalum caps. Ceramics in that range are quite a bit more expensive (and probably weren’t even available back when that LDO was designed – same goes for low-ESR electrolytics).
Personally I don’t like tantalum much. Only use it if there is no way around. Although they still have the highest density with lowest ESR they also really dislike repetitive and excessive in-rush current. They tend to go up in flames if they are unhappy with their environment. Then there is also the fact that it’s a conflict resource…
Alu-Poly is a great alternative if normal electrolytics or ceramics won’t cut it.While I work on those last details, here are a few up-to-date picture :
Someone in love with tantalum caps? 😉
You could evaluate lowering the series resistance of the RC filter on the PCM5102 output a little. Otherwise you won’t be able to hit the THD+N value they are mentioning in the datasheet. Some TI reference designs are….
The Non-B&O Monitor setting are Generic and Panasonic Screen. Do you knoe if thast can be updated to include LG Screen? Is that a possibility?
Can’t tell for sure if there is a matching code for your LG but, yes – the projector PUC table in general should be updatable by your dealer.
That may be just fine because I’m really using the LG TV as a monitor. My needs are modest. I just need power on and power off for the TV. Volume and input control is all handled by the BS3. I know there is some video manipulation, but my wife and I both like the effect and I plan to go through a full calibration soon to bring everything up to HD standard. I’d like to use the remote to turn on TV, my cable box, and the BS3. Channel control would be on the cable box, volume on the BS3.
Had no luck directly turning it on with the BR1. Just OFF.
As Tignum already wrote, easiest would be to use a projector PUC that matches the LG TV. It would turn it on/off automatically over IR. I think they all still have IR.
Using a source PUC wouldn’t work in your case if you use the BS3 for video as well.Everything else requires some advanced tinkering.
I was going to ask if I could control the TV just using the BeoRemote One directly. Is that even an option?
You can pair it over BT with the LG TV but it won’t be of much use. I think only the cursor, volume and power off works. No enter, no back, no home key. Pretty much useless.
In my setup it’s working fine but you have to build a little converter box.
https://forum.beoworld.org/forums/topic/beoremote-1-with-generic-lg-tv-or-any-other/
Having a similar setup although I’m using the BS3 for audio only.
Used to have exactly like you are describing it but the video output of BS3 wasn’t looking good. Even in game mode where it should be more or less pass-through. Not about the resolution but it does some image post-processing just not looking good on modern screens.Anyway, what you are looking for is possible but requires some advanced “tinkering” skills.
You could use the projector control output for switching on the LG. You would have to build some kind of IR translator or IR receiver -> LG IP protocol converter.
But *absolutely* one should be able to play a stream proffered by a content provider, without having to use some web browser and then divert its audio output using Airplay or Chromecast.
A little off-topic for this thread but technically you can do so using the Mozart platform API that is available to public. Not convenient but it works.
https://bang-olufsen.github.io/mozart-open-api/
E.g. from command line with cURL. Replace the IP with the one of your speaker and string with a URL to a radio station.
curl --request POST \
--url http://0.0.0.0/api/v1/playback/uri \
--header 'Accept: application/json' \
--header 'Content-Type: application/json' \
--data '{
"location": "string"
}'Sure. I’m using this handy python lib.
https://github.com/supersaiyanmode/PyWebOSTV
system.screen_off() is what you are looking for.
values from 10nF to 10µF
Had to use a good 100 uF electrolytic cap combined with 3x 22 uF and fine tuning of the buck converter feedback loop to get the ripple on that rail to an acceptable level. Anyway, as you said not of much interest here.
Somehow DL can only be bit banged. Of course offloading realtime tasks to a dedicated MCU would give best results. Nevertheless DL is so slow and looking to be tolerant enough that you can abuse it quite a lot. For me it works 100% reliable.
From what I know there are no connectivity issues with ESP32. Actually its reception quality is pretty good for what it is. For stable operation it requires some external low ESR bulk capacitance. Also some supply rail filtering between ESP and the remaining system is good practice here. All the low cost dev boards you can get are a little short on this end…
Probably let’s not talk about compliance here. It will certainly vanish any fun on such projects. 😉
BlueZ is… well often there is just no way around it when using linux. Although for audio streaming bluez-alsa works pretty nice.
For that other project I was actually thinking about implementing the whole DL communication on the same FTDI chip that already handles the ML communication. It has some nice GPIOs that are more than fast enough to bit bang it. So that could be a nice single chip solution that entirely runs over USB…
I did a proof of concept about 2 years ago using an ESP32, but couldn’t get a reliable sound stream with anything other than the default SBC codec (which really isnt that good). I then attempted to pivot to Qualcomm chips, but they are really interested in small volume orders. I ended up using the Microchip BM83 module, which works quite well for my use case, except for its really arcane documentation !
Ah, interesting that it wasn’t reliable for you with an ESP32. Been using it myself for a couple of projects already and was always happy. Did you use their IDF SDK or the Arduino stuff?
Yes, I know those BM83 modules. Around for ages I think and come with a hefty price tag for what they are.
Was there a particular reason you just didn’t go with a Linux system? Things tend to be a lot easier then.
Nice, congrats!
Which BT chip are you using?Just got me thinking of this thread https://forum.beoworld.org/forums/topic/beolink-passive-ir-eye/page/3/#post-20843 where I tested an MCL IR eye connected to the AUX connector of a Beomaster 5500 and was able to control it via the IR eye. So based on that volume control via datalink should be possible. I don’t have the Beomaster 5500 anymore, but can try to do the test with a Beocenter 9300 and Beomaster 4500 and see if it works the same.
Ah, thanks. That is some good input again.
I made the assumption that local volume control through the AAL / DL port should be possible because I saw that the IR protocol is very similar to the DL one. I would have tested it by just sending a Beo 4 IR command for volume up/down without the carrier enabled.Perfect that you already tested that! So most likely they are even identical.
If the music system is in option 0 and you request a source through datalink it will start up in “muted” state. In that case volume commands are not transmitted through DL as this usually happens in the option 2 master device.
Volume on the DL / ML port is always at fixed level.On the 1611 PL socket only pin 4 is used. Likely as a wake up signal. No PL data signals are used in the 1611.
Regarding that volume issue was more thinking of a stand-alone scenario where you are using the AAL port to feed an external source into the music system. Then you would have to deal with two independent volume controls – unless you could send a certain local volume command via DL before playback starts.
But also very interesting if it actually is possible to send such things as datalink commands. @B3OHACK3R do you have some kind of overview of what actually is possible to do with datalink commands besides the obvies like play/pause, stop, standby, fw/rw and so on?
Obviously you can do everything that is also possible in an option 2:0 setup with a (2-way) video master.
What I currently don’t exactly know is if it’s possible to send local control commands like volume, treble, bass etc. via datalink in an option 1 setup. Haven’t looked into that yet.
You would have two independent controls but could probably work if you also send a DL command to set a fixed volume.
Most Beocenters/Beomasters have the ability to store a preset start-up volume, which should alleviate this problem.
Good luck then to remember that high preset volume next time you’d like to listen to a CD 😉
I guess you don’t have many David Lewis era speakers then. Converting the existing 8-pin DIN to RJ45 would be ideal – although as the audio isn’t balanced, the choice of cable would be important – maybe CAT6E wouldn’t be good enough..
I do – and exactly this also makes me worry about the length increase of the stiff part on the cable. Even if you would come up with a similar adapter like the ML one I made – the length would easily increase 2 to 3 cm. Probably too much for the tight space on several speakers.
Also those DIN plugs are easily available everywhere. So you will be able to manually solder PL cables probably close to eternity. Not so with the ML connectors.
Another use case that came to mind is an interface to activate the Aux input on a Beomaster/Beocenter with datalink when sound is detected from analog audio input (Airport Express, Chromecast audio etc.). This way source like CD, tape and phone can be controlled with normal operation, but when you wan’t to start music from your phone you don’t need to use both the phone and a B&O remote.
Good idea! Only having a simple audio input then would probably make the volume control a bit difficult. You would have two independent controls but could probably work if you also send a DL command to set a fixed volume.
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