*sound science series # 7
Recording a new audio file !!
(RAW, WMA or WAV data file)
Sample rate (frequency):
(frequency may be chosen from 8000 Hz to 96000 Hz)
# 11025 Hz suitable for voice recording,
# 22050 Hz suitable for tape quality recording, # 44100 Hz suitable for CD quality recording.
Sampling size:
8 bit cassette tape quality (lower sound quality),
16 bit CD quality,
24 bit higher sound quality.
Channel
Mono/Stereo options* a Wave file with better sound quality requires a larger storage space because of it's higher sampling rate and size.
Mixing:
When mixing 8 bit data with 16 bit wave data, convert attributes via status bar.
Recording a new audio file:
Menu > File > NewSelect: sampling rate, bit depth, recording device, playback device.
Menu > Audio > Record
File > Save
Enter the new file name and then click Save button
Using Direct X audio plug ins:
are software components that let you apply special effects to your audio files. You must install the plug-ins on your computer before you can use this feature.
Audio clean-up:
Menu> Audio Clean-upHiss removal 30 %
Click removal
Original Hiss level
Reverse:
Menu > Task > Reverse > Channels (select) > OK*tips: unusual sound effects, if you mix a wave with it's reversed form.
Normalize:
Menu > Task > Normalize
Echo:
Task > Echo > Add Echo ( Echo Magnitude and Echo Delay) > OKFade-in and fade-out:
fading in (soft to loud)
fading out (loud to soft)
*effect to your entire audio file.
Invert Waveform:
Task > Invert Waveform > (select channels) > OKThis specific effect inverts the Waveform along it's horizontal axis.
*tips: you can create an unusual effect if you invert only one channel of a Stereo file.
Pan Left-to-Right or Pan Right-to-Left:
this effect applies to the Stereo files only.*tips: This feature is useful if you want to simulate movement of a sound source from one end of the sound stage to the other.
Phase shift:
*tips: You can convert a Mono audio file to a Stereo audio file and apply this phase shift-effect. This will give the converted Mono file a 'pseudo-stereo effect'.
Volume:
Task > Volumemagnitude greater than 100 %, increase the Volume.
magnitude less than 100 %, decrease the Volume.
(Stereo = effects both the channels).
Adding markers:
on the Time > Ruler
right click the location, add Marker
or
Removal of markers
Menu > Edit > Markers > Drop markers
Monitoring Volume:
peak indicator - how loud sound is valley indicator - how soft it is
five scales representing different volume range
( - 90 db to Infinity, - 24 db to Infinity etc.)
Options > Volume Meter
- 90 db to infinity,
- 78 db to infinity,
- 60 db to infinity,
- 42 db to infinity,
- 24 db to infinity.
Specifying Indicators:
Right click on the volume meter, lists all the indicators.
Changing Audio Set Up:
Menu > Options > Preferences > Audio: select your required audio devices for both Recording device and Play back device, click OK.
Changing Editing options (undo operations):
Options > Preferences > Editing tab.
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