Re: voice-activated sound and missing initial sounds, and record volume

Roger <[email protected]> Wed, 8 Mar 2017 14:04:29 -0500
Newsgroups	gmane.comp.audio.audacity.general
Message-ID	<[email protected]>
> On Wed, Mar 08, 2017 at 06:13:01PM +0000, Gale Andrews wrote:
>On 8 March 2017 at 17:03, carrt7 . <[email protected]> wrote:
>> (Macbook Pro, OS 10.12.13, built-in mic and LS, Audacity 2.1.2)
>
>Did you mean 10.12.3?
>
>> When I set Preferences > SoundActivatedRecording on, level -50, everything
>> works but the recording misses a fraction of the first syllable spoken after
>> a pause.  I presume this reflects the time taken for the SAS to restart the
>> recording.
>>
>> Will adjusting the Latency or Latency Correction settings make any
>> difference?
>
>Possibly Audio to buffer might.  Latency correction will not.
>
>Really we need a "pre-roll duration" setting for Sound Activated Recording
>to solve this.

To help others understand or to further define this, this means when voice 
activation is utilized or enabled, the recording or audio application will 
always be recording all of the time, preferably keeping about 1-5 seconds of 
audio in a buffer.  Upon voice detection, the audio application will take the 
last 1-5 seconds of audio heard from the microphone, and append that 1-5 
seconds of preserved (or pre-buffered) stream to the beginning of the voice 
detected audio stream, hence preventing any initially clipped audio you are 
currently expereincing.

This is one of those new oblivious settings for portable recording devices, not 
readily or easily understood.

A good example of this function in use, the old motion detection video 
recording devices only recorded the thief in the room after he broke through 
the door.  With this pre-buffered data function, the thief is now recorded 
breaking through the door.

The downside to this function, latency can be significantly effected, causing a 
slight delay (depending upon hardware abilities) before playback of audio in 
addition to network latency.

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*********** ASKING FOR HELP *************

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help you properly: 

* What operating system you are using (for example, Windows XP or Mac OS X 10.5.1)   

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