Audacity Forum

Hi,

re.
Adaptive signal drops repair in audio material by c&p


Hi, please let me know what is your technology when you work with audio material with signal drops (total 0 dB).

In case of prerecorded DTMF signal my approach was to select, copy, paste a part of a track to fill the gap.
Ok. DTMF is 2 frequency signal

so results can be seen in Plot Spectrum sub menu

http://www.filedropper.com/dtmf1113s


The same file played by Asterisk + Celliax
and recorded by Audacity

http://www.filedropper.com/dtmf111s3asterisk


But I am looking for much more state-of-the-art based approach, to build an adaptive filter to repair broken audio stream on-the-fly.

If you are aware of any such solution, please let me know.

What is bad with broken audio signal in prerecorded audio material are cracks heard in headset,
as a result of 0 - 1 audio signal amplitude fluctuactions.

follow-up
another test


First audio file is 10 s chirp generated by Audacity and saved as 8000 Hz, 16 bits wav PCM file
to be played as Asterisk's MusicOnHold file

The second audio file is the 1st file played by Asterisk + Celliax and recorded by Audacity.

Look at signal drops

http://www.filedropper.com/chirp10s

http://www.filedropper.com/chirp10sasterisk