User Guide
Voice Active System
RadioCatch Web Radio Recorder provides smart VAS (Voice Active System) for you to automatically distinguish silence from the signals detected.
Voice Active System
1. Launch RadioCatch Web Radio Recorder
& click "Options" to activate the options
window (
).
2. Choose "Voice Active System"
().
Check "Recording without silence" (
).
Then, you can set some parameters of VAS: Attack Time (
),
Attack Level (
)
& Release Time (
)
& Release Level(
).
If a detected signal is under the Attack Level for more
than Attack Time, beginning of that spot in the audio will
be considered the beginning of silence. If the signal is
above the Release Level for more than Release Time, beginning
of that spot in the audio will be considered the end of
silence. Click "OK" to save your settings
(
).
Silence Definition
For very quiet high quality audio, the Attack Level and Release Level value will be lower (like -60dB). For noisier audio, the value may be much higher (like -30dB).
If audio is above this given threshold for more than the number of milliseconds given, audio will be considered valid and not silence. Use higher values for Release Time to ignore short periods of audio (like clicks, static, or other noise). If this value is too high however (above 200ms), short words may be skipped.
