Howto:convert aac/mp4 to wav/mp3/ogg on Linux
From Linux Multimedia Wiki
m4a is the file extension for the proprietary audio format mostly used by that iTunes thingy. A conversion to more player friendly (usb mp3player for example) formats like mp3 or ogg only works, if the aac’s aren’t DRM protected.
According to the project home page, dmidecode’s purpose is to report “information about your system’s hardware as described in your system BIOS according to the SMBIOS/DMI standard… This information typically includes system manufacturer, model name, serial number, BIOS version, asset tag as well as a lot of other details of varying level of interest and reliability depending on the manufacturer. This will often include usage status for the CPU sockets, expansion slots (e.g. AGP, PCI, ISA) and memory module slots, and the list of I/O ports (e.g. serial, parallel, USB).”
lshw (Hardware Lister) is a small tool to provide detailed information on the hardware configuration of the machine. It can report exact memory configuration, firmware version, mainboard configuration, CPU version and speed, cache configuration, bus speed, etc. on DMI-capable x86 or EFI (IA-64) systems and on some PowerPC machines (PowerMac G4 is known to work).
Recently, Free Pascal (FPC) version 2.2.0 was released. This open source Pascal compiler has – since its initial release in 1993 – grown to be one of the most sophisticated open source compilers available today. Daily, more programmers discover FPC and develop their applications in Object Pascal. Specifically, the development of Lazarus has contributed to this phenomenon: Lazarus is a graphical open source IDE for FPC, with an extensive tool kit to design graphical (GUI) applications.
Schifra is a very robust, highly optimized and extremely configurable Reed-Solomon error correcting code library for both software and IP core based applications with implementations in C++ and VHDL.
Starting with version 2.5, linux kernel introduced a new system call entry mechanism on Pentium II+ processors. Why this new mechanism? Well, somebody reported performances issues with system calls on Pentium IV processors. Apparently, the system call mechanism based on software interrupts was responsible for this performance lag. Linux, or Linus more specifically, responded by implementing an alternative system call mechanism.