Category: Retropie pcm speaker master

Retropie pcm speaker master

Home Theater is populated by an abundance of connection options for sending audio and video signals to your TV or video projector, and hearing sound from your home theater audio system and speakers or soundbar. One type of connection used for audio is referred to as Digital Optical. Digital Optical is a physical connection that uses light fiber optics to transfer audio data digitally 1's and O's from a compatible source device to a compatible playback device using a specially designed cable and connector.

The audio data is converted from digitally encoded electrical pulses to light pulses on the transmission end using an LED light bulb not a Laser as many think. After the light passes through the digital optical cable to its destination, the light pulses are converted back to electrical pulses containing the audio information.

retropie pcm speaker master

The electrical sound pulses then travel further through the compatible destination device such as a home theater or stereo receiver that processes them, eventually converts them to analog signals, and amplifies them so that they can be heard through speakers or headphones.

Some Blu-ray Disc players that have eliminated digital optical as an audio connection, opting for an HDMI-only output for both audio and video. Ultra HD Blu-ray players usually include a digital optical audio output option, but it is up to the manufacturer — digital optical connectivity is not required for Blu-ray or Ultra HD Blu-ray players. If you have a home theater receiver that has digital optical connections but no HDMI connections, make sure when shopping for a Blu-ray Disc player, Ultra HD Blu-ray Disc player, media streamer or other source devices, a digital optical audio connection is included.

For video, you need to use a separate type of connection, such as HDMIcomponentor composite. Digital audio signals, such as 5. These types of audio signal formats require the use of HDMI connections. When the digital optical connection was developed, it was made to accommodate the digital audio standards at the time mainly 2-channel CD playback. In addition, it also provided enough bandwidth space for basic Dolby Digital and DTS Digital Surround but did not include the bandwidth capacity for the more advanced 5.

Toslink is short for "Toshiba Link" as Toshiba was the company that invented and introduced it into the consumer market. The development and implementation of the digital optical Toslink connection paralleled the introduction of the CD audio format, where it was first used in high-end CD players before it expanded into its current role in home theater audio. There is also another digital audio connection option that has the same specifications, including the same audio format transfer limitations, as Digital Optical, and that is Digital Coaxial.

However, instead of using light to transfer audio signals, they are transferred via traditional wire using RCA-style connectors. Tweet Share Email. Digital optical connections are typically included on the following devices:. Digital Optical connections are also referred to as Toslink connections.

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Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Already on GitHub? Sign in to your account. This doesnt allow volume control if USB Sound card is being used. For that "Speaker" is the recommended device. OMX player by default only outputs to local ie.

For a person not using USB audio, there should still be option to switch between local and hdmi.

retropie pcm speaker master

There are users like me who have the entire hardware soldered into a single box and yet switch between HDMI and Composite display. Fixes Skip to content. Dismiss Join GitHub today GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.

Sign up. New issue. Fixes for USB sound cards joolswills merged 1 commit into RetroPie : master from hex : handle-alsa-audio Jun 5, Copy link Quote reply. Fixes for USB sound cards …. This comment has been minimized. Sign in to view. Would it make sense for it to be a single option that would set the right values for both OMX and system?

Is there a use case for splitting the audio? Yes actually, there are cases where it would be different. This commit was created on GitHub. Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment. Linked issues. Add this suggestion to a batch that can be applied as a single commit. This suggestion is invalid because no changes were made to the code. Suggestions cannot be applied while the pull request is closed. Suggestions cannot be applied while viewing a subset of changes.

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Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Already on GitHub?

Sign in to your account. Hopefully this gives people the flexibility that they need in order to avoid the issues people have with unusual RPi audio setups. Added the ability to select the audio card as well, by surfacing the audio card under the Audio Card setting. It was previously forced to 'default' for all linux users, which was too restrictive in some instances.

This change now adds flexbility to support additional linux and Rpi Audio Cards. This will give advanced users enough extra configuration ability that should avoid problems with even the strangest setups.

JustBoom uses non-standard mixer names, and the one that controls volume is called "Digital". So EmulationStation wouldn't work for me. Instead I got the dreaded "lv VolumeControl ::init failed to find mixer elements", which happens when EmulationStation can find the audio card, but not the audio mixer.

Fix Low Volume on MAME games (e.g. Mortal Kombat)-RPi Quick Tips

I checked the existing code and realised that there was a way to fix the Audio Settings once and for all for all Linux and RPi users, to give people the flexibility to try custom device names and custom mixer names if needed, but also to give people a much bigger range of options for all the different RPi Audio HATs out there, as well as the different USB Audio devices available that people use.

So hopefully this pull request is merged so we can do away with all the "lv VolumeControl ::init failed to find mixer elements" errors people get, and things will just work! Hi jrassa. I've updated the file fully from spaces to tabs as per the project standard. Hope that's ok. It's ready for your review again. I merged in hissingshark Vero 4K volume mixer fix to my audio enhancements pull request. It should work without issues now for Vero4K users.

I expect the 'default' card will work fine, and the Vero4K User will be able to select the following Audio Cards:. Can you squash it down to one commit and I will get it merged. Skip to content. Dismiss Join GitHub today GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.

Sign up. New issue. Enhanced Audio settings jrassa merged 1 commit into RetroPie : master from tminit : custom-audio-rpi Aug 30, Conversation 13 Commits 1 Checks 0 Files changed. Copy link Quote reply. This comment has been minimized.

Sign in to view. It was just something I noticed.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Raspberry Pi Stack Exchange is a question and answer site for users and developers of hardware and software for Raspberry Pi. It only takes a minute to sign up. This may sound like a duplicate question, but the answers to similar questions are not solving my problem.

My aplay -l output is. I don't know if the speakers are working or the Pi is not recognizing them. Just had a similar issue and solved it like this found in this tutorial :.

Locate your speaker in the list of playback hardware devices. Write down the card number and device number. Create a new file named. Do this for pcm.

Digital Optical Connection – What It Is And How To Use It

All we have to do is tell Raspbian to look at "card 1" for the default audio. Card 0 is the built in audio, so this is fairly straightforward. The Adafruit guide for USB speaker installation that worked for the person that answered on Apr 4 '19 at did not work alone for me. Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered. Ask Question. Asked 3 years, 11 months ago.

Active 1 month ago. Viewed 11k times. I issued wget goo. HTTP request sent, awaiting responseOn my RetroPie machine I wanted a hardware volume knob — the games I play use a handful of emulators, and there's no unified software interface for controlling the volume.

The speakers I got for my cabinet are great, but don't have their own hardware volume knob. So with a bunch of googling and trial and error, I figured out what I need to pull this off: a rotary encoder and a daemon that listens for the signals it sends. A rotary encoder is like the standard potentiometer i. I picked up this one from Adafruit, but there are plenty others available. This rotary encoder also lets you push the knob in and treats that like a button press, so I figured that would be useful for toggling mute on and off.

So we've got 5 wires to hook up: three for the knob part A, B, and groundand two for the button part common and ground. Here's how I hooked them up reference :. Since the GPIO pins are just for arbitrary signals, you need a script on the Pi that knows what to do with them.

Switching audio output between jack and HDMI on RetroPie

You'll see the script below, but here's how it works: it listens on the specified pins, and when the knob is turned one way or another, it uses the states of the A and B pins to figure out whether the knob was turned to the left or to the right. That way it knows whether to increase or decrease the system volume in response, which it does with the command-line program amixer.

Create a bin directory in your pi folder if it doesn't exist already, then drop the script below into it. You can run this script in the foreground just to test it out.

Edit the script and temporarily change DEBUG to True so that you can see what's going on, then simply run it with monitor-volume. When you turn or press the knob, the script should report what it's doing. Make sure that the volume increases rather than decreases when you turn it to the right, and if it doesn't, swap your A and B pins, or just swap their numbers in the script.

You should also play around with the constants defined at the top of the script. Naturally, if you picked other pins, you'll want to tell the script which GPIO pins to use. If it's working the way you want, you can proceed to the next step: running monitor-volume automatically in the background whenever your Pi starts.

Hopefully someone can pipe up with a version of this for init. Because it's new, there's not much RPi-specific documentation on it, and to find out how to use it you have to sift through a bunch of Google results from people who hate systemd and wish it didn't exist. After much trial and error, here's what worked for me:.

If that worked right, then you just told Raspbian to start up that script in the background on every boot enableand also to start it right now start. At this point, and on every boot after this, your volume knob should Just Work. I got this working on an RPi3 running RetroPie 3. I've heard that in earlier versions of Raspbian, the pi user isn't automatically allowed to access the GPIO pins, so you need to run scripts like this as root.

If you're running into permissions errors when you try to run the script from your shell, then that's your problem, most likely.RetroPie is a great multi-emulator project for the Raspberry Pi, but I noticed that its auto-detect for which audio device to use seems a bit erratic.

retropie pcm speaker master

Firstly, you can change the audio output for the current session i. To run this command, either switch to another terminal session e.

Alternatively, from another machine, you can SSH into your Pi and run the command in the shell there. To make this a permanent change, you need to run RetroPie-Setup. I have built an arcade table and I put an extension socket on the side to extend one of the USB sockets and the 3. I would like to run the sound through HDMI to the speakers in the monitor but have the ability to plug in external speakers to my extension socket.

I tried extending from the headphone socket on the TV but it stops the sound from the inbuilt speakers and when plugged o to the Pi I get nothing. Skip to content RetroPie is a great multi-emulator project for the Raspberry Pi, but I noticed that its auto-detect for which audio device to use seems a bit erratic.

Then choose either Headphones for the 3. Choose OK, then reboot! Like this: Like Loading Thanks was also looking for how to boot to setup double Thanks. Is there any way to have both?

The guide above is great and allows me to switch but would like both to work simultaneously. Pingback: Happy Friday! Leave a Reply Cancel reply. Previous Previous post: Finally! Next Next post: Questioning my gaming credentials. Sorry, your blog cannot share posts by email.


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