Language Selection

English French German Italian Portuguese Spanish

Sound filtering... with the Gimp!

Filed under
GIMP

Gimp is universally used for image manipulation. However, with a bit of creativity and a couple of tricks, it can also be used as an audio filter! Here is how…

Sound filters

If you are familiar with sound filters, you can skip this introduction. For those of you who don’t know about filters, here is a brief explanation.

A sound, like all signals, is measured in Hz (Hertz). That measure expresses the signal frequency. The lower the measure, the lower the frequency. A filter is a tool that enhances one or more signal frequencies, according to a criterion. In an ideal world, a filter completely suppresses undesired frequencies. Unfortunately, we don’t live in an ideal world.

I will concentrate on a single filter: low-pass. A real low-pass filter is something that receives an input signal and outputs its low frequency components. To be more precise, it attenuates those frequencies higher than a set one (the cut-off frenquency). As you see in figure 1, it just approximates theoretical behavior.

More here




More in Tux Machines

Python 3 Support Added To The GNOME Shell

The GNOME Shell 3.15.2 release fixes some visual glitching, improves the layout of the extension installation dialog, supports the CSS margin property, and offers other bug fixes and minor enhancements. Most notable to GNOME Shell 3.15.2 though is there's finally Python 3 support. Many GNOME components have long ported their Python 2 code to Python 3 while GNOME Shell's Python support has just received the Py3 treatment. Details on GNOME's overall Python 3 porting work can be found via this Wiki page. Read more

Clonezilla Live 2.3.1-15 Now Available with Check for 32-bit Libraries

Clonezilla Live is a Linux distribution based on DRBL, Partclone, and udpcast that lets users perform bare metal backup and recovery with ease. The developers have just upgraded the system and it's now at version 2.3.1-15. Read more

Workaround Found for Annoying Workspace Switcher Bug in Ubuntu 14.10

The virtual desktops on Ubuntu systems have been working very well in the last few editions, but it looks like there is a problem in Ubuntu 14.10, at least for the system I'm running. The desktop locks up with the workspace switcher activated. Read more

Inside Cisco's OpenStack Cloud Strategy

Cisco first got involved with the open-source OpenStack cloud platform in 2011 with the Bexar release and initially was focused mostly on networking. Over the last several years, Cisco's OpenStack involvement and product portfolio have grown beyond just networking. Read more