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Step 3: Pulse audio volume control (pavucontrol)

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Pulse always respects the choices made at lower levels (and ALSA is about as low as you can get in the sound system, drivers notwithstanding). Pulse doesn't "steal" your audio, so you don't have to worry about Pulse intercepting your signal and re-routing it some place else. Pulse has an ALSA plug-in, so even if your first choice as a destination is ALSA, you'll still have some ability to manage that sound from Pulse.

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This may be important if you're using pro apps, like a soft synth and an effects rack and a DAW, and you need absolute control over channel routing (with JACK or Patchage, for instance) and processing order. Send sound to ALSA if you want direct control. You can send it to Pulse and manage it from Pulse's control panel-Pulse's job is to manage sound dynamically. Send sound to Pulse to benefit from Pulse's simplified worldview. If you're confused by all the choices, it's usually safe to send sound to Pulse. The point is, you need to decide where your sound is headed once it leaves its parent application. While an application like Google Hangouts gives you a simplified view: VLC, for example, gives you lots of choices: Not all applications give you much of a choice, but there's usually has some kind of menu somewhere governing what the application does with its sound. Similar to checking cables and knobs, check the settings of the sound application you're using on your computer. If you left your headphones plugged in, or you forgot to power on your speakers, or turned the volume down on your speaker or the application playing sound, then spending time and effort configuring your system is pointless. You've done this once or twice yourself, too. You're living in the "turn it off, and then on again" school of audio engineering.Īdmit it.

Manage your targets from Pulse Audio Control ( pavucontrol)Ĭheck your cables.

Set sound input or output from source of sound.

Check your cables (virtual and physical).

To get comfortable with Pulse, you need to remember three things: It adds several bonus features, too, such as the ability to send audio to a different computer and invisibly changing the sample format or channel count. Pulse sits patiently between the thing that is generating sound and the thing meant to receive that sound, making sure everything plays nicely with one another.

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Audio output used to be either a speaker or headphones, but now we want our computer to beam audio across the room to the screen we use as a TV and to pick up audio from a Bluetooth mic in a phone. The thing is, we're demanding a lot more of our computers now than ever before. Your box was still "broken" until you could swap out config files and restart the service. Sometimes it was the fault of the application itself, but that doesn't change the end result. Using ALSA could result in some pretty convoluted configs and wrapper-scripts, and you still never get one configuration to serve your every use case.

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However, dealing directly with ALSA can require a lot of manual hacking. ALSA works so well that some distributions are just starting to integrate Pulse by default. This article is about getting comfortable with the sound controls of a modern Linux system. If you want to know more about that level of sound configuration, visit support forums such as Linux Questions and documentation sites such as Slackermedia to help you.

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This is not an article about how to install drivers or set sound defaults. If you have sound working on your Linux machine on a daily basis, but you get thrown off balance when you need to get specific about sound inputs and outputs, read on. Instead, they can use tools sitting on top of ALSA, like Pulse Audio. The difference is that on modern Linux, users don't generally need to deal directly with ALSA to route sound. Without going too far back in history, Advanced Linux Sound Architecture (ALSA) traditionally managed Linux audio. Sound is generated by one thing and sent to another.īetween those two end points exists a Linux sound system, because, after all, something needs to route the sound. No matter what, the model is always the same. Free online course: RHEL Technical Overview.Running Kubernetes on your Raspberry Pi.A practical guide to home automation using open source tools.6 open source tools for staying organized.An introduction to programming with Bash.A guide to building a video game with Python.