Tag: Fedora Project community

Today, I’m excited to share the results of the hard work of thousands of contributors to the Fedora Project: our latest release, Fedora 33, is here! This is a big release with a lot of change, but I believe all that work will also make it a comfortable one, fulfilling our goal of bringing you the latest stable, powerful, and robust free and open source software in many easy to use offerings. 

If you just want to get to the bits without delay, head over to https://getfedora.org/ right now. For details, read on!

Find the Fedora flavor that’s right for you!

Fedora Editions are targeted outputs geared toward specific “showcase” uses on the desktop, in server and cloud environments—and now for Internet of Things as well.

Fedora Workstation focuses on the desktop, and in particular, it’s geared toward software developers who want a “just works” Linux operating system experience. This release features GNOME 3.38, which has plenty of great improvements as usual. The addition of the Tour application helps new users learn their way around. And like all of our other desktop-oriented variants, Fedora Workstation now uses BTRFS as the default filesystem. This advanced filesystem lays the foundation for bringing a lot of great enhancements in upcoming releases. For your visual enjoyment, Fedora 33 Workstation now features an animated background (based on time of day) by default.

Fedora CoreOS is an emerging Fedora Edition. It’s an automatically-updating, minimal operating system for running containerized workloads securely and at scale. It offers several update streams that can be followed for automatic updates that occur roughly every two weeks. Currently the next stream is based on Fedora 33, with the testing and stable streams to follow. You can find information about released artifacts that follow the next stream from the download page and information about how to use those artifacts in the Fedora CoreOS Documentation.

Fedora IoT, newly promoted to Edition status, provides a strong foundation for IoT ecosystems and edge computing use cases. Among many other features, Fedora 33 IoT introduces the Platform AbstRaction for SECurity (PARSEC), an open-source initiative to provide a common API to hardware security and cryptographic services in a platform-agnostic way.

Of course, we produce more than just the Editions. Fedora Spins and Labs target a variety of audiences and use cases, including Fedora CompNeuro, which brings a plethora of open source computational modelling tools for neuroscience, and desktop environments like KDE Plasma and Xfce. 

And, don’t forget our alternate architectures: ARM AArch64, Power, and S390x. New in Fedora 33, AArch64 users can use the .NET Core language for cross-platform development. We have improved support for Pine64 devices, NVidia Jetson 64 bit platforms, and the Rockchip system-on-a-chip devices including the Rock960, RockPro64, and Rock64. (However, a late-breaking note: there may be problems booting on some of these devices. Upgrading from existing Fedora 32 will be fine. More info will be on the Common Bugs page as we have it.)

We’re also excited to announce that the Fedora Cloud Base Image and Fedora CoreOS will be available in Amazon’s AWS Marketplace for the first time with Fedora 33. Fedora cloud images have been available in the Amazon cloud for over a decade, and you can launch our official images by AMI ID or with a click. The Marketplace provides an alternate way to get the same thing, with significantly wider visibility for Fedora. This will also make our cloud images available in new AWS regions more quickly. Thank you especially to David Duncan for making this happen!

General improvements

No matter what variant of Fedora you use, you’re getting the latest the open source world has to offer. Following our “First” foundation, we’ve updated key programming language and system library packages, including Python 3.9, Ruby on Rails 6.0, and Perl 5.32. In Fedora KDE, we’ve followed the work in Fedora 32 Workstation and enabled the EarlyOOM service by default to improve the user experience in low-memory situations.

To make the default Fedora experience better, we’ve set nano as the default editor. nano is a friendly editor for new users. Those of you who want the power of editors like vi can, of course, set your own default.

We’re excited for you to try out the new release! Go to https://getfedora.org/ and download it now. Or if you’re already running a Fedora operating system, follow the easy upgrade instructions. For more information on the new features in Fedora 33, see the release notes.

A note on Secure Boot

Secure Boot is a security standard which ensures that only officially-signed operating system software can load on your computer. This is important for preventing persistent malware which could hide itself in your computer’s firmware and survive even an operating system reinstallation. However, in the wake of the Boot Hole vulnerability, the cryptographic certificate used to sign Fedora bootloader software will be revoked and replaced with a new one. Because this will have a broad impact, revocation should not happen widely until the second quarter of 2021 or later.

However, some users may have received this revocation from other operating systems or firmware updates already. In that case, Fedora installations will not boot with Secure Boot enabled. To be clear, this will not affect most users. If it does affect you, you can boot with Secure Boot disabled for the time being. We will release an update signed with the new certificate to be available on all supported releases well before broad-scale certificate revocation takes place, and at that point Secure Boot should be reenabled.

In the unlikely event of a problem….

If you run into a problem, check out the Fedora 33 Common Bugs page, and if you have questions, visit our Ask Fedora user-support platform.

Thank you everyone

Thanks to the thousands of people who contributed to the Fedora Project in this release cycle, and especially to those of you who worked extra hard to make this another on-time release during a pandemic. Fedora is a community, and it’s great to see how much we’ve supported each other.

The PulseEffects app is a full-featured set of modular effects you can use to adjust sound devices. In a previous article, you learned how you can use PulseEffects to correct or enhance output devices like speakers. However, that’s not where its features stop. You can also enhance sound input devices such as microphones. This can help when recording sound for podcasts, videos, or the like.

This article assumes you’ve already installed PulseEffects as shown in the previous article. It will not cover advanced topics like recording musical instruments, but it will show you how to do better voice or spoken-word recordings.

A word on microphones

Microphones come in a variety of forms. The one almost every laptop user has at hand is the condenser microphone built into the hardware. These microphones are limited in terms of producing quality sound. They’re built to provide basic sound, and they will pick up a lot of environmental noise due to how they work. If you want better results for a voice recording, there are many choices available based on budget.

• USB headset with built-in condenser microphone: Generally budget-friendly and almost always gives better results than a laptop’s built-in mic. The resulting sound can be somewhat harsh and tinny, but this can be corrected. Manufacturers such as Logitech make units that are plug-and-play ready for Linux. They show up as USB sound devices (both input and output).
• Handheld dynamic microphone: You’ll see the singer in a live band using one of these. You have to be close to them (and maintain that distance steadily) for best results, but they sound full and well-defined. These are typically a little more expensive than a USB headset.
• Large diaphragm condenser microphone: You’ll see this type used by a singer or speaker in a broadcast or recording studio. Like other condensers they pick up a lot of the surrounding environment. By being fairly close to the mic you can essentially “turn down” the rest of the room. You can find budget friendly, good quality large condensers starting at the same price as a good dynamic mic. Prices go up from there to astronomical levels!

Most dynamic and large diaphragm condenser mics need to be plugged into a digital audio interface, using a microphone cable. This converts the signal from the mic into digital audio for the computer to use. However, you can find specialty mics made for direct connection via USB. These may be advertised as “podcaster mics,” and you can save some money using one of these, versus buying both a mic and an interface.

Making the mic sound better

Effects help you improve the recorded sound of your microphone. Whether you know it or not, you hear these effects all the time in recorded sound — in music, in TV shows and movies, on professional podcasts, and via commercial and satellite radio. Engineers apply these effects using either hardware units, or via software.

PulseEffects provides these effects in a software form, before your recording is saved on disk. Here is a list, in the order they are usually applied:

• A gate reduces or entirely mutes the microphone when sound falls below a certain level. With proper settings, when you start speaking, the gate quickly opens, unmuting the mic. When you finish, the gate closes and other environmental sound will be either silenced or much quieter.
• A compressor reduces the dynamic range of the input. Louder sounds are caught by the compressor and squashed down. You then turn the entire signal up slightly to compensate. This way, quieter and louder sounds become closer in volume, making the sound more even and less “peaky.” This results in a more professional, polished sound that’s much more enjoyable for listeners.
• An equalizer (EQ) tunes up the sound of the voice. Use it to mitigate tones in your voice that you find unflattering. In addition, when you speak close to a mic, the bass frequencies in the voice are unnaturally emphasized. Sound engineers call this the proximity effect. By using an EQ to roll off the low end frequencies, you can reduce this effect and create a more pleasant sound.
• A limiter is often the last step in a signal chain. This effect puts an absolute limit on the volume of a sound, so that unexpectedly hard sounds (such as p or b sounds, called plosives) that aren’t caught by compression don’t distort and ruin your recording.

Dive into PulseEffects

Open up the PulseEffects app. In the top left corner, choose the microphone selector icon. This lets you set up the effects chain you want for the mic as an input device. As with output devices (speakers), you can save your effects chain as well.

Use recording software that registers as a PulseAudio client to see your effects at work. The PulseCaster app is one such app, but there are many others you can choose.

Tips from a mix engineer

These guidelines may help you find the optimal sound. Remember that no two sound situations are ever the same. Use your ears, and do some test recordings, to figure out what’s best for your situation.

• When you apply the gate, use a fast response of 5-10ms. The human voice has a significant “startup time,” so this speed makes the gate unnoticeable. Give the gate some time to close, though, so you don’t cut off the end of speech. Typically 100-200ms sounds fairly natural. A gain reduction of -12 or -18dB suffices to reduce environmental noise, and sounds more natural than more extreme values.
• If you find a module is overloading when you speak, either reduce the output of the effects module before it, or the input of the module itself.
• If you like the sound of your recorded voice without an EQ, use the Filter module instead to simply apply a high pass filter. For male voices, use a roll-off frequency of 80-100 Hz. For female voices, use a higher value. If you set the filter too high, the recording may sound weak or nasal.
• Use a compressor ratio between 3 and 4 (this is actually 3:1 – 4:1) which works well with a human voice. An attack of 20ms and a release of 100-200ms is typical.
• You may want to try the Deesser module as well, to reduce the “sizzling” of s, z, t, and f sounds. Because voices vary so widely, you’ll need to tune this to taste. A split of 6kHz and a threshold of -18dB is a good place to start.
• A limiter setting of -1 to -3dB usually works well. Much lower settings result in a very “squashed” sounding track. In some cases that may be useful; in others it will sound unnatural.

Refer to the previous article to save your effects chain. Remember, you can store multiple chains, and then select the one you want for your particular needs.

Photo by Jacek Dylag on Unsplash.