I now have two boards, and 1 raspberry Pi.
I used toslink-connectors to get the signal in and out of the speakers, and used a microsd extension to be able to modify the software of the Pi.
But... what now? How do I get the one speaker to act as master, and send one channel through to the other speaker?
I can't install SigmaStudio on my pc, something with permissions, I think.
Do I really need this, or is there a another way to get a profile for RL6000 stereo setup?
Rop
Hi Rop,
my apologies for not getting back to you earlier. I saw your question in the earlier thread about stereo pairing, and I'm here to give you answers.
Turns out you do not actually need SigmaStudio for this anymore, you can accomplish this via SSH on the Raspberry Pi itself. Disclaimer before we begin: the stereo pairing support is experimental at this stage and hasn't been properly tested in terms of sound quality.
First the preparations. For both the master and slave speakers/boards, you should install the RL 6000 sound profile, if you haven't done so already – just plug the Raspberry Pi into the boards one at a time and do it through the setup interface. After this you won't need to connect the Pi to the slave board anymore.
You can connect the two boards through optical out/in now or later, it's up to you. From the connector with a red light on the master to the dark connector on the slave, as you probably know.
The master speaker will need two things configured: to tell it to act as a master speaker to another speaker, and to choose which channel we send to the slave speaker. We use dsptoolkit from HiFiBerry to do this, because it allows us to change settings that are not available in the setup interface. Here's how:
1. Log in to the Raspberry Pi over SSH (if you haven't done this before or otherwise need assistance, let me know).
2. First, type dsptoolkit get-meta directSlaveSelectRegister and press enter. You should get a number – it should be 454 (we check this just to verify that you have the correct program running). This is the "switch" that will set the speaker to master mode.
3. To flip this switch, type dsptoolkit write-mem 454 0 and press enter. This has two possible choices: 2 for standalone or slave mode (default) and 0 for master mode.
4. Next, type dsptoolkit get-meta slaveChannelSelectRegister and press enter. You should again get a number, 453. This is the switch that selects which channels are sent to the slave speaker. It has four possible options: 0 (stereo), 2 (left), 4 (right), and 6 (mono).
5. For example, to set the slave speaker to the left channel, type dsptoolkit write-mem 453 2 and press enter.
That should do it! Note that right now these two settings are not permanent and will reset when the system reboots – but if this works for you, we can go through saving the settings to the board so that you don't have to apply them manually.
The channel for the master speaker you can set normally through the setup interface.
Again, sorry for not responding earlier. Just reach out if you have any further questions about this or something doesn't work and let's look into it.
Best,
Tuomas from Bang & Olufsen
Hello Tuomas,
Thank you for the instructions! Works immediatly, without problems!
The only question that remains now is how to make these things permanent.
Thanks for the help so far!
Rop
Oh, and the sound is great in stereo!
Rop
Hi Rop,
good to hear that this is working for you and that the sound is good.
Let's apply the settings permanently to your board. This is actually not very difficult:
1. Log in to the Raspberry Pi via SSH.
2. To store the settings, we first need to create a text file where to put them. Type nano masterslave.txt and press enter. You can give the file whatever name you want, but remember it for the last step.
3. We should now be in the nano text editor with our new blank file open. We need to add the following two lines into it:
directSlaveSelectRegister: 0
slaveChannelSelectRegister: 2
As you can see, these are the same settings that we did manually earlier. Change the number of slaveChannelSelectRegister to select which channel you would like to use on the slave speaker – again, 0 (stereo), 2 (left), 4 (right), and 6 (mono).
4. Once done, press Ctrl-X on your keyboard to exit. Press Y to say that you want to save the file, and then enter to confirm the file name.
5. Next, we use DSPToolkit to store this settings file. Type dsptoolkit store-settings masterslave.txt and press enter.
The settings should now be stored on the board and recalled automatically at startup. If you later want to change the slave speaker channel, you can edit this file and store it again using the same steps as above.
If you hit any roadblocks or have any other questions, just let me know.
Best,
Tuomas from Bang & Olufsen
Again, no problems so far. Will put speakers where they are supposed to come, hope everything still functions then.
Thanks for the support, Tuomas, happy to get the speakers of the kitchen table at last..
:-)
Rop
I reinstalled the RL6000 profile, because I wasn't sure about something. Also made the raspberry have a fixed IP, and made sure the powermanagemnet setting was off.. After all this, the second, slave speaker isn't working anymore :-(
When I try dsptoolkit get-meta directSlaveSelectRegister again, I get 479 ??
I am absolutely clueless what do do now..
The masterslave.txt is still there, and still contains the same:
directSlaveSelectRegister: 0
slaveChannelSelectRegister: 4
??