An Online Radio Station
When you want to build an online radio station, you have to know the equipment that you want to record first. It's preferable by far for broadcast quality interviews to have a Sony TCD5M or a Sony Walkman Pro or a Marantz. Dats are good also. These are all quite expensive. Marantz is the least expensive.These days a Sharp Minidisc Recorder the most commonly used because it's small, affordable and sound is good. Also you can do some editing on it. It is important to have levels you can see, but if you simply can't afford or have access to one of these recorders, use the best quality one you can. It's best to have an external microphone so you can put it close to the interviewees mouth. If you have to use a recorder with a built-in mic then hold the recorder close to the person's mouth. Also, be sure to mic yourself in the same way you mic the interviewee. If you have a choice find a quiet place for the interview. If not, even an interview in a noisy crowd can work if you have a good recorder and the correct microphone techniques – it is called "off mic". Once you record it then you have to edit it by using WavePad or some other softwares. WavePad is a sound editor program for Windows. This software lets you make and edit voice and other audio recordings. You can cut, copy and paste parts of recording and, if required, add effects like echo, amplification and noise reduction. WavePad is designed to be very easy and intuitive to use. Within minutes you will be able to open or record a file and edit it. But if you take time to explore the other features you will find many powerful tools designed with the professional sound engineer in mind.
MP3 Audio
When recording sound onto your computer, it is important to adjust the output volume of your source so that it doesn't "clip," or overload, your computer's audio input. Simple sound recording freeware such as Coaster (mac) can help you set your levels; Coaster also allows you to chop the recording into separate files as you record. For best results, MP3 audio files containing voice-only material should be encoded in Mono at a bitrate of up to 64k. Stereo and a higher bitrate of 128k can be used for files that include music. When encoding streaming MP3 files at modem-bitrates (such as 16k), choose a low sampling rate (such as 16 kHz). For best results (higher quality sound and a smaller filesize), turn on VBR (variable bit rate) encoding. You should also remember to type in the title and any other information for the "ID3" fields. On the Mac side, the free iTunes is excellent for encoding MP3s.
RealMedia
First of all, you will need an audio or video file that is compatible with RealProducer, Media Cleaner, or any other program that can encode RealMedia files. The better the quality of your source material (for example, uncompressed audio), the better the quality of your RealMedia file. RealMedia clips can be encoded as single-rate or multi-rate (SureStream). We serve RealMedia via the real time streaming protocol (RTSP), so make sure to choose SureStream; the file will be larger, but re-buffering will be reduced to a minimum, and image and sound quality vastly improved. If you are using the free version of RealProducer, you can only choose two SureStream rates. We usually recommend 28.8k and 56k, as the majority of internet users have slow connections.
Or may be you can use Sound Forge - works with any sound card that has Windows supported audio drivers. With Sound Forge 4.5, dynamic ranges as high as 24 bit and sampling frequencies as large as 96 kHz are supported. The program will also allow you to save files as low as 8 bit mono for the gaming/cd-rom producer. Once files have been recorded, edited and processed, the files can be saved in a wide variety of formats including, .WAV, AIFF, as well as MP3 and Real Audio. In fact I find saving files using Sound Forge’s codec for Real Audio to be superior to Real Audio’s own encoder.
http://sf.indymedia.org/process/resources/interviewing.php
www.digitalproducer.com/pages/ sound_forge_digital_sound_editin.htm
http://hometheater.about.com/blediting2.htm