Audacity is a free, versatile, easy-to-use software program for working with audio and is available for Windows, Macintosh, and Linux operating systems. It is full-featured and makes voice recording and editing music or other sounds easy.
The table below can help you estimate the kind of mp3 quality/compression and bit rates to use for your own applications. We also give you approximate file sizes to help you compare. For most in-class audio lectures 32 kbps will work. For supplemental recordings that are shorter in length, 64kbps-96kbps will offer better audio quality.
|Format||Bit rate||File size/minute||Notes|
|WAV||uncompressed||10 MB||If the wav file was sampled at 16 bits/44.1 kHz, you've got CD quality sound|
|MP3||160 kbps||1.5 MB||Very low compression, superior sound quality|
|MP3||128 kbps||1 MB||The standard "CD quality" bit rate|
|MP3||96 kbps||700 K||Considered "near CD quality"|
|MP3||64 kbps||400 K||Slightly lower than FM radio station|
|MP3||32 kbps||250 K||Lower quality audio, low file size. Good for recording long lectures and keeping file size small.|
Audio Recording Studio
A full-featured audio recording studio is available for students to use. To reserve the audio recording studio, contact firstname.lastname@example.org.
Another sound booth, called the Whisper Room, is available on a walk-in basis at the TLMC lab, QBB 150C.
Ripping Audio Files in Windows Media Player
This tutorial can help you to rip audio files from a CD in Windows Media player. Watch the video for valuable tips that will save you time and trouble later.
TLMC – Quentin Burdick Building 150C - Students are on duty to assist you. Visit the TLMC website for information about open lab hours and services.
Equipment – Headphones with microphones are available at the TLMC, and some are available for checkout (with NDSU ID) at the IT Help Desk in Quentin Burdick Building 150.
Technology Learning and Media Center
Quentin Burdick Building 150 C