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Thank you very much indeed.

I am going to try to apply some filtering over that signal

FYI: Apparently g729 (http://www.moviecodec.com/download-audio-codecs/voiceage-open-g729-26/) gives back...

I do not fully understand what you are trying to achieve but a simple solution is just

ls "SS_101_123.zip" "SS_123_890.zip"


Do you want to search only those two files or all files which...

So you are suggesting to use another codec for ADPCM 3bit?

I clearly distinguish the difference between pauses and voice but I cannot hear anything clearly.

I feel really close but I do not...

Thanks a lot. I have converted it, using this decoder. The solution seems a bit closer. I need to use this tool very carefully. I will let you know how it goes

Thanks again

I have already used Nice Media player and it didn't work. How can I use sox to convert these chunks of data in a not proprietary audio format?

As I wrote before the logger was set using the...

I have some configuration file that tell me the following about the logger settings:

I just discovered that these tapes may use CRC- based framing

When you say stream, do you mean the audio blocks or the metadata?

The logger was sold years ago and I just joined the company. I was asked to extract the data from these tapes

The logger I was told was a normal computer with two tape drivers.
I cannot tell more...

The audio data come from tapes (DDS)

Yes you are right there are many of these block and their size is fixed at 524288 bytes

I do not get how the audio data should be decrypted each this data...

I am extremely sorry mate.

I uploaded the wrong file

https://www.dropbox.com/s/1l041xgxb1yucd9/input

I am really sorry indeed

I have tried to open it with audacity (raw data) manyyyyyyyy manyyyyy times. However, I cannot get anything except noise. I have already listened at this data using its logger, and its quality is...

This audio come out from a voice logger. The logger apparently (not totally sure) was set to compress the data in a-law. So there could be two solutions. First, the logger was not properly set (very...

Hi guys

Here there is an example of audio data
After having tried a lot any form of audio codec I need to ask your help

https://www.dropbox.com/s/1l041xgxb1yucd9/input

It should be encoded...

Sorry you are not the man, you are the KING

Thanks, this is what I was looking for, You are THE MAN.

I need just a final tip but it is off-topic (so feel free to answer). I know the audio data in encoded in G729.
My question is, how this...

I know exactly what there is inside the tape because I have the tape and its content on my disk.

However, the problem is that I have other 10 tapes that were produced with the some machine that...

Thank you for your reply

I have heard many times that this job cannot be done without knowing the source of my data and how it has been written on the tape and I agree with you. Unfortunately, I...

The hardware configuration should be:
CPU Pentium II 400 MHz
Internal memory 128 Mb

Operating System: Windows 2000 server

Do you suggest any particular parameter?

It returns that that file is a normal data stream (Very Useful :confused:)
The magic file cannot be found and the data is in a proprietary format.

I have extracted a raw data file from a magnetic tape using the dd command

Afterwards, I managed to read the extracted data with Bless HexEditor and I found out that at offset 0x200000 there is a...

Thank you Corona for your reply,

I have extracted some calls using the original software but it was a very long job. I cannot extract more than one call per time. Given the fact that the tape...

Hi Everyone,

Apologise if this is not the right section where to post the following:

I have worked for some weeks on a system which records audio calls coming from various channels of a TDM...