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Record Skype easily Extra tool : Offline audio Recorder < Record Skype, You Can >
PowerGramo Offline Recorder is an easy-to-use audio recorder you can use to record all kinds of sound on your computer into MP3 / WMA / OGG / WAV files with high quality. It's able to record audio from microphones, line-in, phone line, cassette tape, video tape and more other input devices. The audio recorder also supports recording from other windows applications, like winamp, media player, etc. This makes it very easy to record online radio, broadcast and other internet sound. It simply makes a complete audio recording studio of your computer!




1. Understand some basic concept of sound recording.
2. Configurations before recording.
    2.1 Select an audio device.
    2.2 Select output format.
    2.3 Select an audio line according your recording task.
    2.4 Select encoding method.
    2.5 Select a folder for saving records.
3. Operations
    3.1 Recording.
    3.2 Playing during pause of recording.
    3.3 Saving recorded data.
    3.4 Manage records.
4. Understand mixer and record audio line (inside learning).

1. Understand some basic concept of sound recording.
Record sound on a PC is through a sound card, convert analog signal to digital. it controlled by the following parameters:
Bit rate:
Bit rate (or bit depth) describes how many binary digits a digital audio file uses to describe the amplitude of the audio it is recreating. Each bit doubles the accuracy with which an amplitude level can be described (16 bit = 65,536 possible levels). Record on a PC , it can be 16 bit or 8 bit. Obviously using 16 bit will create higher quality sound but need more storage.

Sampling rate (frequency):
Sampling rate is the number of values (samples) measured per second in the conversion of audio from analog to digital. The standard CD digital rate of 44.1 KHz restricts the maximum sampled frequency to 22.05KHz. For a point of comparison, Human hearing is usually said to be 20Hz to 20KHz. PowerGramo Offline Recorder support following frequencies: 8000, 11025, 16000, 22050, 32000, 44100, 48000. The higher the frequency, a higher sound quality can be produced.
Channel number:
It can be either stereo or mono. Stereophonic sound, commonly called stereo, is the reproduction of sound, using two independent audio channels, through a pair of widely separated speaker systems, in such a way as to create a pleasant and natural impression of sound heard from various directions as in natural hearing. Monaural (often shortened to mono) sound reproduction is single-channel. Typically there is only one microphone, one loudspeaker, or, in the case of headphones or multiple loudspeakers, they are fed from a common signal path, and in the case of multiple microphones, mixed into a signal path at some stage.


2. Configurations before recording.
2.1 Select an audio device.
All audio devices (sound cards) are listed in the device pull-down list window. There you can select one of them. But usually you have only one sound card installed on your computer.

2.2 Select output format.
Selecting output format means selecting the combination of bit rate, channel number and sample rate (frequency). All combinations PowerGramo Offline Recorder supports are listed in the second pull down list window.

2.3 Select an audio line according your recording task.
This is the most subtle configuring task. Which audio line to be selected depends on what are you going to record.
Record Streaming Audio
A) Find audio line for streaming audio recording
Usually the audio line for streaming audio recording has the name of Stereo Mix or Wave out .But its name may be different for different sound card. If you know the name of stream audio line, you just click on the checkbox shown at left side of the name of the line.
B) Open other media player to play audio.
C) Click the record button to start recording, sound played by the media player will be recorded.
Record from microphone
A) Connect microphone to your PC on jack of the sound card.
B) Activate the audio line of microphone by checking the box on the left-side of the line name.
C) Speak to microphone.
D) Click the record button to start recording.
Record from audio cassette player or DVD player
A) Connect audio cassette player or DVD player to your PC. Use a single stereo audio cable to connect audio cassette player to the line in jack of the sound card:

Use a stereo audio cable which one end has two single channel plugs to connect audio cassette player to the line in jack of the sound card:

B) Select the audio line of Line In by click the check box on left-side of it.
C) Play the audio cassette player or DVD player.
D) Click the record button to start recording.

2.4 Select encoding method.
Click button "Settings" to bring forth the Settings window. There you can select one from the two encoding methods. One is PCM encoding, which stores uncompressed raw audio data (.wav files). Another is MPEG encoding that enables you to compress audio data into MP3 files. But please note: if you choose sample rate lower than 16000 or bit rate other than 16, even you select MPEG encoding method, audio data will be saved in .wav files rather than in MP3 files.

2.5 Select a folder for saving records.
Click button "Settings". This will bring forth the Settings window. The folder can be set there. If you didn't set the folder or the folder you selected does not exist, the program will prompt for saving location as you go to save a record.


3. Operations.
3.1 Recording.
Press start button to start recording and press stop button to stop recording. Be careful to note where the thumb of the progress slider locates when you begin recording. The position the thumb indicates is where new data will be written. So data behind this position will be overwritten while recording continues.

3.2 Playing during pause of recording.
When recording is paused, the play button is enabled. Then you can press it to play sound that has been recorded. Press stop button to stop playing.

3.3 Saving recorded data.
After recording, or when recording is paused, click save button to save data. Depending on your settings, data maybe save in raw format or compressed into mp3 format. After saving a file, a new record will be added into the playlist.
You can also choose to pack audio data into a VEA file. To do this, click "Save as VEA" button to save data. VEA files enable you to save some comments together with the audio data for further reference. For details about VEA file, click here.

3.4 Manage records.
All saved records will be displayed in the playlist window at right side of the user interface. Beneath the playlist window, buttons and a progress slider are provided for record replaying. Clicking right mouse button in the playlist window will bring forth a popup menu. By using it you can add audio files into the list or remove items from the list.


4. Understand mixer and record audio line(inside learning).
A sound card mixer is the part of a sound card that can mix the sound input from different sources.

The following schematic shows how a sound card's mixer manipulates sound from different sources:




Play controls on a typical sound mixer:
Control channels Controlled source
Wave* stereo Sound generated by the computer when playing MP3, WAV,...
Also the sound when playing a CD-DA in some programs (Windows Media Player, Media Player Classic) or playing a MIDI in certain programs (JetAudio)
MIDI/SW Synth stereo Sound generated from a MIDI device or synthesizer (electronic keyboard, Windows Media Player, IrfanView, Media Player Classic, ...)
CD playback stereo Sound generated when playing a CD-DA in most programs (JetAudio, IrfanView, ...)
Microphone mono Sound entering through an internal microphone, or the microphone jack
Line in/Aux stereo Sound from an external source (iPod, television, etc.)
SPDIF mono Uncommon digital interface of some devices
PC speaker mono Sound generated in the old internal PC speaker. This is the sound heard in old MS-DOS programs and on boot (on PC's)
Volume control stereo Mixed sound sent to the speakers (output)

TV tuner cards and other similar devices output their sound via the Wave channel.

Record controls: 
Control Channels Source
Stereo mix stereo Mixed sound sent to the recorder
Mono mix mono Mixed sound converted into mono, sent to the recorder
Microphone mono Sound from the microphone that is directly going to be recorded

Record streaming sound
As this sound is controlled through wave control, you have to set this volume in the playing control (maybe it's convenient to mute all others, except volume control if you want to hear it meanwhile). In recording, selecting stereo mix or mono mix will enable you to record any other internal sound of your PC, i.e. voices of TTS engines, sounds of the operating system.

User testimonials
"The Skype Recorder software works so beautifully! So easy and elegant to use, with a very simple interface.
Well done!"
                     --- Chris Betcher

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