[SoX-users] acoustic-marks in audio-file

[Rainer M. E. <en...@en...>]

Hello everyone,

I'm new to SoX and although I don't know why I read this type of opening
sentence so often in other lists, I'd simply like to ask a certain question.

I want to create a soundfile in which I hear at certain time positions a
very short peep-sound. This file should be mixed over the audio track of
a movie to mark some positions in an acoustic manner.

Layout:
|-silent----------------|peep|-silent------------| ....
 mixed with..
|-original-audio---------------------------------| ....


What would be the best way to achieve this?

Given is a wav-file 48KHz Stereo of ~2hours length and there would be a
few or several hundred peep marks to make.

First Approach:
Opening original audio file and mix peep at certain positions. How could
this be done incremental or in one step?
Is it possible to create a reference level tone as beep?


Second Approach:
1. create all silent fragments in their desired length
2. create peep-wave segment (perhaps: reference level tone)
3. concatenate these fragments: silent1+peep+silent2+peep ...
4. mix this wav with a matching length over original wave



Any thoughts, help appreciated.

Best Regards,
Rainer