Daily Archives: 2012/09/27

What Is a Good BitRate Guideline for MP3 Files?

MP3 files are compressed audio files that are made from audio formats such as the wave (.wav) format. Wave files replicate analog recordings and digital sound files with a high degree of accuracy at the cost of large file sizes, while MP3 files sacrifice some quality for a smaller footprint. The quality sacrificed can be mitigated by several factors in the conversion process. With the right bitrate and configuration, MP3 files can provide extremely high-quality results that make them very close to their original wave files when played on portable audio players.

The balancing act between file size and quality is a somewhat subjective. To an audiophile any difference will be discernible. Others might not be able to tell a high quality MP3 file from its original wave source at all. In many cases the difference only becomes clear if played through a high-quality stereo system where the smallest nuances of the acoustic environment become clear.

MP3 files are primarily targeted for portable audio players. In this arena quality MP3 files come through with astounding sound given their small file size. Since portable players have limited memory, it makes sense that people want their MP3 files to be as small as possible while preserving as much quality as possible.

To this end the single most important factor in the creation of MP3 files is the bitrate. Generally, the more bits preserved per second from the original file, the higher the quality of the MP3 and the larger the file size. A lower bitrate reduces size and quality. The idea is to use a bitrate that results in maximum authenticity without preserving unnecessary data, which only creates larger files without appreciable difference to the ear.

For audio voice recordings such as lectures or language lessons preserved in wave form, bitrates of 32 kilobits per second (kbps) should be acceptable, though 64kbps might provide better quality depending on the source. Voices might sound “flat” at 32kbps, though they will be understandable. A 64kbps MP3 file made from a voice recording should sound nearly identical to the original.

Non-saturated acoustic music that features simple arrangements should get good results with a bitrate of 192kbps. If the music will be played on high quality equipment, you might opt for 256kbps. Music that falls in this category would include ballads, “boy-band” songs, easy listening and folk music. Also the work of many classic artists such as James Taylor, Linda Ronstadt, Joni Mitchell, and Simon & Garfunkel.

To make quality MP3 files from classical music and jazz, the best bitrate depends on the song’s characteristics. Soft jazz can normally be replicated at 192kbps to create a good balance between file size and diminishing returns, though 256kbps might sound better on the home entertainment center. Orchestral classical should do well at 256kbps for portable players, but files of 320kbps might be a better choice if you’ll be burning to CD for the home or car.

For saturated music such as hard rock, metal, arena, pop, electronic and house music, 320kbps will give the best results. The greater number of bits per second will preserve more of the complex acoustic envelope.

When possible it is preferable that MP3 files be created using a variable bitrate. This allows the encoding program to determine if a particular frame of music requires the full bitrate. If not, the program reduces data retention for that frame resulting in a smaller file without sacrificing quality. Forcing a program to “over-sample” a frame can produce artifacts.

While this article is intended as a general guideline, one might find that he or she is just as happy with lower bitrates for specific songs or in general. Many factors affect our ability to judge the quality of music, including not just the equipment we use, but our activity when listening. For those who listen to MP3 files when exercising or walking outside, for example, exterior noise will make it more difficult to pick out qualitative differences. Conversely, audiophiles might prefer to sample everything at 320kbps, regardless of their equipment, the music’s genre, or listening habits.

If making your own MP3 files, there are also other settings that affect quality. LAME is an excellent MP3 encoder and is free, along with the many graphical interfaces that serve as a front-end for this well-known command line program. LAME allows the user to tweak many settings in order to produce high quality MP3 files in seconds. One can also try various bitrates on a source file to find the best subjective balance between quality and file size.

Source: http://www.wisegeek.com/what-is-a-good-bitrate-guideline-for-mp3-files.htm

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Windows 8

Windows 8 is the basic edition of Windows for the x86 and x86-64 architectures. This edition contains features aimed at the home market segment and provides all of the basic new, Windows 8 features including the Start screen with semantic zoom, live tiles, Windows Store, Internet Explorer 10, connected standby, Microsoft account integration, the Windows desktop and more.
Windows 8 Pro
Windows 8 Pro succeeds Windows 7 Professional and Ultimate[2][3] and is targeted towards enthusiasts and business users; it includes all the features of Windows 8. Additional features include operating as a Remote Desktop server, the ability to participate in a Windows Server domainEncrypting File SystemHyper-V, and Virtual Hard Disk Booting, Group Policy as well as BitLocker and BitLocker To Go. Windows Media Center functionality will be available only for Windows 8 Pro as a free “add-on.”[3]
Windows 8 Enterprise
Windows 8 Enterprise provides all the features in Windows 8 Pro (except the ability to install the Windows Media Center add-on), with additional features to assist with IT organization (see table below).[2]This edition is available to Software Assurance customers, as well as MSDN and Technet Professional subscribers, and was released on August 16, 2012.[4]
Windows RT
Windows RT will only be available pre-installed on ARM-based devices such as tablet PCs,[5] and was named for the Windows Runtime (WinRT) development platform that Microsoft is introducing in Windows 8.[5] It will include touch-optimized desktop versions of the basic set of Office 2013 applications to users—Microsoft WordExcelPowerPoint, and OneNote, and support device encryption capabilities. Several business-focused features such as Group Policy and domain support are not included.
Read more…

Unlock BlackBerry

– Determine if your BlackBerry is “locked or unlocked”:

A. On your BlackBerry, go to Options > Advanced Options > Sim Card.

B. At that screen type MEPD (holding Shift Key) on your keyboard. A new menu will pop up.

C. Look for Network in the list.

D. If your device is “unlocked”, it should say Disabled or Inactive. If it says Active, it’s still locked to that carrier.

 

If BB is locked, we can unlock as following:

– Get IMEI:           Type (dail) *#06#

OR       From the Home screen: select Menu > Select Options > Select Status :Your IMEI will be located on the screen with the PIN and ESN numbers.

OR       Alt _ Cap _ H

– Get MEP:

+ “ALT CAPS H” to show “Help Me” screen

+ Get BB-Key at http://www.webalice.it/zibri/escr.html

Device PIN: 226de7e1

App Version: 5.0.0.1036 (1682)

Uptime: 1083325

+ Type in BB-Key (not case sensitive)

+ Go to “OS Engineering Screens”

+ Device Info, scroll down to see MEP-xxxxx-xxx

If device is not password protected, can get MEP via software (Read Mep)

– Get free unlock code from:

http://www.freemyblackberry.com/unlockcode.php

– Unlock with code:

+ For Blackberry Bold 9000

Note: No SIM is needed to unlock the phone.

1) Turn off/Disable all connections (Bluetooth, WIFI and Network communications). The menu is located under Manage Communications.

2) Go to Settings

3) Go to Options

4) Go to Advanced Options

5) Go to SIM Card

6) Hold CAPS and type “mepd” OR hold CAPS + type “mepe”/ “mepd” (please note that you will not see what you type on the screen). A new menu should drop down. If your phone is locked you will see “Active” or “Enabled” beside “Network”.

7) Hold ALT and type “mep2” OR hold ALT + type “mep2” (Please note that you will NOT see what you type on the screen).

 

Note: On the right hand side of the prompt you will see “X left”, where X is the number of tries you have left to enter the code. NEVER let this number go below 4. Once you get to 0 your phone will be hard-locked.

8) It will ask you for the unlock code. Enter the 8 or 16 digit unlock code we provided and then press enter to confirm (only enter the unlock code once!!!!). You should get a “code accepted” message. Your phone is now unlocked!

 

*****If you get a “code error” please see the first question in our Questions and Answers section.*****

http://www.freemyblackberry.com/instructions.html

 

9) Once unlocked Turn All Connections ON.

10) Please reset your phone. You can do this in two ways: 1) remove the battery while the phone is on, insert SIM as desired and re-insert the battery. OR 2) You can press and hold ALT+RIGHT SHIFT+Backspace/Delete in that order.